031 FZUS51 KBUF 182003 NSHBUF Nearshore Marine Forecast National Weather Service Buffalo NY 403 PM EDT Mon May 18 2026 For waters within five nautical miles of shore Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. LEZ020-LOZ030-190300- Upper Niagara River and Buffalo Harbor-Lower Niagara River- 403 PM EDT Mon May 18 2026 .TONIGHT...Southwest winds 5 to 10 knots. A chance of showers late. .TUESDAY...Southwest winds 10 to 15 knots increasing to 15 to 20 knots. Partly to mostly sunny. .TUESDAY NIGHT...Southwest winds 10 to 15 knots becoming west. Showers with a chance of thunderstorms. .WEDNESDAY...Northwest winds 5 to 10 knots. Showers in the morning. .WEDNESDAY NIGHT...Northwest winds 10 knots or less becoming north. Partly cloudy. .THURSDAY...Northeast winds 10 knots or less becoming east. Partly cloudy. .FRIDAY...East winds 5 to 15 knots. Showers likely Friday night. .SATURDAY...East winds 5 to 15 knots becoming southeast. Showers likely during the day, then a chance of showers Saturday night. Winds and waves higher in and near thunderstorms. The water temperature off Buffalo is 52 degrees. $$ LEZ040-041-190300- Buffalo to Ripley along Lake Erie- 403 PM EDT Mon May 18 2026 .TONIGHT...Southwest winds 5 to 10 knots. Partly cloudy this evening, then becoming mostly cloudy. Waves 1 foot or less. .TUESDAY...Southwest winds 5 to 15 knots. A chance of showers in the afternoon. Waves 2 feet or less. .TUESDAY NIGHT...Southwest winds 10 to 15 knots becoming west. Showers with a chance of thunderstorms. Waves 1 to 3 feet. .WEDNESDAY...West winds 5 to 10 knots. Showers in the morning. Waves 1 to 3 feet. .WEDNESDAY NIGHT...Northwest winds 5 to 10 knots becoming northeast. Partly to mostly cloudy. Waves 2 feet or less. .THURSDAY...Northeast winds 5 to 10 knots becoming east. Partly cloudy. Waves 2 feet or less. .FRIDAY...East winds 5 to 15 knots. A chance of showers during the day, then showers likely Friday night. Waves 1 foot or less. .SATURDAY...Southeast winds 5 to 15 knots. Showers likely with a chance of thunderstorms. Waves 1 foot or less. Winds and waves higher in and near thunderstorms. $$ LOZ042-190300- Niagara River to Hamlin Beach along Lake Ontario- 403 PM EDT Mon May 18 2026 .TONIGHT...Southwest winds 10 to 15 knots. A chance of showers late. Waves 1 to 3 feet. .TUESDAY...Southwest winds 10 to 15 knots increasing to 15 to 20 knots. Partly to mostly sunny. Waves 1 to 3 feet building to 2 to 4 feet. .TUESDAY NIGHT...Southwest winds 15 to 20 knots becoming west. Showers with a chance of thunderstorms in the evening, then showers likely overnight. Waves 3 to 5 feet subsiding to 2 to 4 feet. Waves occasionally around 6 feet. .WEDNESDAY...West winds 15 to 20 knots. Showers likely in the morning. Waves 2 to 4 feet subsiding to 1 to 3 feet. .WEDNESDAY NIGHT...Northwest winds 5 to 15 knots becoming north. Partly cloudy. Waves 1 to 3 feet. .THURSDAY...Northeast winds 10 knots or less becoming east. Partly cloudy. Waves 2 feet or less. .FRIDAY...East winds 10 to 15 knots increasing to 15 to 20 knots. Showers likely Friday night. Waves 1 to 3 feet. .SATURDAY...East winds 15 to 20 knots diminishing to 10 to 15 knots. Showers likely during the day, then a chance of showers Saturday night. Waves 2 to 4 feet subsiding to 1 to 3 feet. Winds and waves higher in and near thunderstorms. $$ LOZ043-044-190300- Hamlin Beach to Mexico Bay along Lake Ontario including Irondequoit Bay- 403 PM EDT Mon May 18 2026 .TONIGHT...South winds 5 to 10 knots becoming southwest. A chance of showers. Waves 1 foot or less. .TUESDAY...Southwest winds 5 to 15 knots increasing to 15 to 20 knots. Partly to mostly sunny. Waves 1 to 3 feet. .TUESDAY NIGHT...Southwest winds 10 to 15 knots becoming west 15 to 20 knots. Showers likely with a chance of thunderstorms in the evening, then showers likely overnight. Waves 1 to 3 feet building to 2 to 4 feet. .WEDNESDAY...West winds 15 to 20 knots. A chance of showers in the morning. Waves 2 to 4 feet building to 4 to 7 feet. Waves occasionally around 9 feet. .WEDNESDAY NIGHT...West winds 15 to 20 knots becoming north 10 to 15 knots. Partly cloudy. Waves 4 to 7 feet subsiding to 2 to 4 feet. Waves occasionally around 9 feet. .THURSDAY...North winds 5 to 15 knots becoming east less than 10 knots. Partly cloudy. Waves 1 to 3 feet subsiding to 1 foot or less. .FRIDAY...East winds 5 to 15 knots. A chance of showers Friday night. Waves 2 feet or less. .SATURDAY...Southeast winds 15 to 20 knots diminishing to 10 to 15 knots. Showers likely. Waves 2 to 4 feet subsiding to 1 to 3 feet. Winds and waves higher in and near thunderstorms. The water temperature off Rochester is 49 degrees. $$ LOZ045-190300- Mexico Bay to the Saint Lawrence River along Lake Ontario- 403 PM EDT Mon May 18 2026 .TONIGHT...South winds 5 to 10 knots becoming southwest. A chance of showers and thunderstorms. A chance of showers late. Waves 2 feet or less. .TUESDAY...Southwest winds 5 to 15 knots. A chance of showers in the morning. Waves 2 feet or less. .TUESDAY NIGHT...Southwest winds 10 to 15 knots increasing to 15 to 20 knots. Showers with a chance of thunderstorms in the evening, then showers overnight. Waves 1 to 3 feet building to 2 to 4 feet. .WEDNESDAY...West winds 10 to 15 knots becoming southwest 15 to 20 knots. Showers likely in the morning. Waves 2 to 4 feet building to 3 to 6 feet. Waves occasionally around 7 feet. .WEDNESDAY NIGHT...West winds 15 to 20 knots becoming north 10 to 15 knots. Partly cloudy. Waves 3 to 6 feet subsiding to 1 to 3 feet. Waves occasionally around 7 feet. .THURSDAY...North winds 10 to 15 knots becoming light and variable. Mainly clear, then becoming partly cloudy. Waves 2 feet or less. .FRIDAY...East winds 10 knots or less. A chance of showers Friday night. Waves 1 foot or less. .SATURDAY...Southeast winds 10 to 15 knots. Showers likely. Waves 2 feet or less. Winds and waves higher in and near thunderstorms. $$  635 FZUS53 KMKX 182010 NSHMKX Nearshore Marine Forecast National Weather Service Milwaukee/Sullivan WI 310 PM CDT Mon May 18 2026 For waters within five nautical miles of shore on Lake Michigan LMZ643-190900- Sheboygan to Port Washington WI- 310 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .THROUGH EARLY EVENING...South wind 10 to 15 knots. Partly sunny. Waves 3 to 4 feet. .TONIGHT...South wind 10 to 15 knots rising to 15 to 20 knots late in the evening, then becoming south 15 to 20 knots after midnight. Chance of showers and thunderstorms in the late evening and overnight. patchy fog after midnight. Waves 3 to 4 feet building to 4 to 6 feet early in the morning. .TUESDAY...South wind 15 to 20 knots veering west late in the afternoon. Gusts up to 25 knots. Patchy fog in the morning. slight chance of thunderstorms in the morning. Chance of showers through the day. Waves 4 to 6 feet subsiding to 3 to 4 feet in the late morning and afternoon. .TUESDAY NIGHT...Northwest wind 15 to 20 knots easing to 10 to 15 knots with gusts to around 20 knots late in the evening, then becoming northwest 10 to 15 knots with gusts to around 20 knots after midnight veering north early in the morning. Partly cloudy. Waves 2 to 4 feet subsiding to 1 to 2 feet in the late evening and overnight. .WEDNESDAY...North wind 10 to 15 knots veering northeast late in the afternoon. Mostly sunny. Waves 1 to 2 feet. $$ LMZ644-190900- Port Washington to North Point Light WI- 310 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY AFTERNOON... .THROUGH EARLY EVENING...South wind 5 to 10 knots rising to 10 to 15 knots late in the afternoon. Partly sunny. Waves 2 to 4 feet. .TONIGHT...South wind 10 to 15 knots rising to 15 to 20 knots late in the evening, then becoming south 15 to 20 knots after midnight. Chance of showers and thunderstorms in the late evening and overnight. Waves 1 to 3 feet building to 3 to 4 feet in the late evening and overnight. .TUESDAY...South wind 15 to 20 knots veering west late in the afternoon. Gusts up to 25 knots. Slight chance of thunderstorms in the morning. Chance of showers through the day. Waves 3 to 4 feet subsiding to 1 to 2 feet late in the afternoon. .TUESDAY NIGHT...Northwest wind 15 to 20 knots easing to 10 to 15 knots late in the evening, then becoming northwest 10 to 15 knots with gusts to around 20 knots after midnight veering north early in the morning. Partly cloudy. Waves 1 to 2 feet. .WEDNESDAY...North wind 10 to 15 knots veering northeast late in the afternoon. Mostly sunny. Waves 1 to 2 feet building to 2 to 4 feet in the afternoon. $$ LMZ645-190900- North Point Light to Wind Point WI- 310 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY AFTERNOON... .THROUGH EARLY EVENING...South wind 10 to 15 knots. Partly sunny. Waves 2 to 4 feet subsiding to 1 to 3 feet late in the afternoon. .TONIGHT...South wind 10 to 15 knots rising to 15 to 20 knots. Slight chance of showers and thunderstorms in the evening, then chance of showers and thunderstorms in the late evening and overnight. Waves 1 to 2 feet building to 2 to 4 feet in the late evening and overnight. .TUESDAY...Southwest wind 15 to 20 knots veering west late in the afternoon. Gusts up to 25 knots. Slight chance of showers in the morning. Slight chance of thunderstorms through the day. Chance of showers in the afternoon. Waves 2 to 4 feet subsiding to 1 to 2 feet late in the afternoon. .TUESDAY NIGHT...Northwest wind 10 to 15 knots with gusts to around 20 knots veering north early in the morning. Partly cloudy. Waves 1 to 2 feet. .WEDNESDAY...North wind 10 to 15 knots veering northeast late in the afternoon. Mostly sunny. Waves 2 to 4 feet. $$ LMZ646-190900- Wind Point WI to Winthrop Harbor IL- 310 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY AFTERNOON... .THROUGH EARLY EVENING...South wind 5 to 10 knots rising to 10 to 15 knots late in the afternoon. Mostly cloudy. Waves 2 to 4 feet subsiding to 1 to 3 feet late in the afternoon. .TONIGHT...South wind 10 to 15 knots rising to 15 to 20 knots after midnight, then becoming south 15 to 20 knots early in the morning. Slight chance of showers and thunderstorms in the evening, then chance of showers and thunderstorms in the late evening and overnight. Waves 1 to 3 feet building to 2 to 4 feet in the late evening and overnight. .TUESDAY...South wind 15 to 20 knots veering southwest late in the morning, then becoming southwest 15 to 20 knots early in the afternoon becoming west 10 to 15 knots late in the afternoon. Gusts up to 25 knots. Slight chance of showers in the morning. Slight chance of thunderstorms through the day. Chance of showers in the afternoon. Waves 2 to 4 feet subsiding to 1 to 2 feet late in the afternoon. .TUESDAY NIGHT...Northwest wind 10 to 15 knots with gusts to around 20 knots veering north early in the morning. Partly cloudy. Waves 1 to 2 feet. .WEDNESDAY...North wind 10 to 15 knots veering northeast late in the afternoon. Mostly sunny. Waves 2 to 4 feet. $$ See Lake Michigan Open Waters Forecast for Thursday through Saturday.  879 FZUS53 KGRB 182013 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 313 PM CDT Mon May 18 2026 For waters within five nautical miles of shore on Lake Michigan LMZ521-522-190400- Green Bay south of line from Cedar River to Rock Island Passage and north of a line from Oconto WI to Little Sturgeon Bay WI- Green Bay south of line from Oconto WI to Little Sturgeon Bay WI- 313 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY EVENING... .LATE THIS AFTERNOON...SE wind 10 to 15 kts. Waves 2 ft or less. A slight chance of showers and thunderstorms. .TONIGHT...SE wind 10 to 15 kts veering S after midnight. Waves 2 ft or less. Patchy fog. a chance of showers and thunderstorms. .TUESDAY...SW wind 15 to 25 kts veering NW 10 to 15 kts early in the afternoon. Waves 1 to 3 ft. A chance of showers in the morning. .TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 2 ft or less. Mostly cloudy in the evening then becoming partly cloudy. .WEDNESDAY...N wind 10 to 15 kts veering E 5 to 10 kts early in the afternoon. Waves 2 ft or less. Mostly sunny. $$ LMZ541-190400- Rock Island Passage to Sturgeon Bay WI- 313 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 AM CDT TUESDAY THROUGH LATE TUESDAY NIGHT... .LATE THIS AFTERNOON...SE wind 5 to 10 kts. Waves 3 to 5 ft. Patchy fog. .TONIGHT...S wind 10 to 15 kts. Waves 2 to 4 ft building to 4 to 7 ft after midnight. Patchy dense fog in the evening. Areas of dense fog after midnight. a chance of showers in the evening. A chance of thunderstorms. Rain showers after midnight. .TUESDAY...SW wind 15 to 25 kts veering NW 10 to 20 kts early in the afternoon. Waves 4 to 7 ft. Patchy fog in the morning. a chance of showers. .TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 2 to 4 ft subsiding to 1 to 3 ft after midnight. Mostly cloudy in the evening then becoming partly cloudy. .WEDNESDAY...N wind 10 to 15 kts veering E 5 to 10 kts early in the afternoon. Waves 2 ft or less. Mostly sunny. $$ LMZ542-543-190400- Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI- 313 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 AM CDT TUESDAY THROUGH LATE TUESDAY NIGHT... .LATE THIS AFTERNOON...SE wind 5 to 10 kts. Waves 2 to 4 ft. Patchy fog. a slight chance of showers and thunderstorms. .TONIGHT...S wind 10 to 15 kts. Waves 2 to 4 ft building to 4 to 7 ft after midnight. Patchy fog. a chance of showers and thunderstorms. .TUESDAY...SW wind 15 to 25 kts veering W early in the afternoon. Waves 4 to 7 ft. Patchy fog in the morning. a chance of showers in the morning. .TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 2 to 4 ft. Mostly cloudy in the evening then becoming partly cloudy. .WEDNESDAY...N wind 10 to 15 kts veering NE in the late morning and afternoon. Waves 2 ft or less. Mostly sunny. $$ See Lake Michigan Open Lake Forecast for Thursday through Saturday. Wave height forecast is for ice free areas.  455 FZUS53 KDLH 182043 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 343 PM CDT Mon May 18 2026 For waters within five nautical miles of shore on Lake Superior. Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. LSZ140-190400- Grand Portage to Grand Marais MN- 343 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM CDT THIS EVENING THROUGH TUESDAY AFTERNOON... .TONIGHT...Northeast wind 15 to 20 knots. Gusts up to 20 knots increasing to 25 knots late in the evening, then increasing to 30 knots after midnight decreasing to 25 knots late in the night. Slight chance of rain showers in the evening. Slight chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 2 feet building to 2 to 4 feet in the late evening and overnight. .TUESDAY...Northwest wind 10 to 15 knots with gusts to around 25 knots easing to 5 to 10 knots with gusts to around 20 knots in the afternoon. Chance of rain showers in the morning. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late morning and afternoon. .TUESDAY NIGHT...Northwest wind 10 to 15 knots. Gusts up to 20 knots early in the evening. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 2 feet. .WEDNESDAY...Northwest wind 5 to 10 knots becoming south 10 to 15 knots with gusts to around 20 knots in the afternoon. Sunny. Waves 1 to 2 feet. $$ LSZ141-190400- Grand Marais to Taconite Harbor MN- 343 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM CDT THIS EVENING THROUGH TUESDAY AFTERNOON... .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 25 knots in the late evening and early morning decreasing to 20 knots. Chance of rain showers in the evening. Slight chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 3 feet building to 2 to 4 feet after midnight. .TUESDAY...Northwest wind 5 to 10 knots. Gusts up to 20 knots in the afternoon. Chance of rain showers in the morning. Chance of sprinkles in the afternoon. Waves 1 to 3 feet subsiding to 1 to 2 feet in the late morning and afternoon. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Gusts up to 20 knots early in the evening. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 2 feet. .WEDNESDAY...West wind 5 knots becoming south in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ142-190400- Taconite Harbor to Silver Bay Harbor MN- 343 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM CDT THIS EVENING THROUGH TUESDAY AFTERNOON... .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots increasing to 25 knots after midnight. Chance of rain showers in the evening. Slight chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 2 feet building to 2 to 4 feet after midnight. .TUESDAY...West wind 5 to 10 knots. Gusts up to 20 knots in the afternoon. Chance of rain showers in the morning. Chance of sprinkles in the afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Gusts up to 20 knots early in the evening. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 2 feet. .WEDNESDAY...Northwest wind 5 knots becoming west late in the morning, then becoming south in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ143-190400- Silver Bay Harbor to Two Harbors MN- 343 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM CDT THIS EVENING THROUGH TUESDAY AFTERNOON... .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots late in the evening increasing to 25 knots, then decreasing to 20 knots late in the night. Chance of rain showers in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 2 feet building to 2 to 4 feet after midnight. .TUESDAY...West wind 5 to 10 knots. Gusts up to 20 knots in the afternoon. Chance of rain showers in the morning. Chance of sprinkles in the afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Mostly cloudy in the evening then clearing. Waves 1 to 2 feet. .WEDNESDAY...Northwest wind 5 knots becoming southeast in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ144-190400- Two Harbors to Duluth MN- 343 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM CDT THIS EVENING THROUGH TUESDAY MORNING... .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots increasing to 25 knots after midnight, then decreasing to 20 knots late in the night. Rain showers likely in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 2 feet building to 2 to 4 feet after midnight. .TUESDAY...West wind 10 to 15 knots. Gusts up to 20 knots in the late morning and afternoon. Chance of rain showers in the morning. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .TUESDAY NIGHT...Northwest wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots after midnight. Mostly cloudy in the evening then clearing. Waves 1 to 2 feet. .WEDNESDAY...West wind 5 knots becoming southeast in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ145-190400- Duluth MN to Port Wing WI- 343 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM CDT THIS EVENING THROUGH TUESDAY MORNING... .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots late in the evening increasing to 25 knots, then decreasing to 20 knots late in the night. Rain showers likely in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 3 feet building to 2 to 4 feet after midnight. .TUESDAY...West wind 10 to 15 knots. Gusts up to 20 knots in the late morning and afternoon. Chance of rain showers in the morning. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .TUESDAY NIGHT...Northwest wind 10 to 15 knots with gusts to around 20 knots becoming west 5 knots after midnight. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 2 feet. .WEDNESDAY...West wind 5 knots becoming southeast in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ146-190400- Port Wing to Sand Island WI- 343 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM CDT THIS EVENING THROUGH TUESDAY MORNING... .TONIGHT...Northeast wind 10 to 15 knots easing to 10 knots late in the night. Gusts up to 20 knots late in the evening increasing to 25 knots, then decreasing to 20 knots late in the night. Rain showers likely in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 2 feet building to 3 to 5 feet after midnight. .TUESDAY...Northwest wind 5 to 10 knots becoming west with gusts to around 20 knots in the late morning and afternoon. Chance of rain showers in the morning. Chance of sprinkles in the afternoon. Waves 2 to 4 feet. .TUESDAY NIGHT...West wind 5 to 10 knots. Mostly cloudy in the evening then clearing. Waves 1 to 2 feet. .WEDNESDAY...West wind 5 knots early in the morning becoming variable 10 knots or less, then becoming southeast 5 knots late in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ147-190400- Sand Island to Bayfield WI- 343 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM CDT THIS EVENING THROUGH TUESDAY MORNING... .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 25 knots in the late evening and early morning decreasing to 20 knots. Rain showers likely in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 2 feet building to 3 to 5 feet after midnight. .TUESDAY...North wind 5 to 10 knots becoming west with gusts to around 20 knots in the late morning and afternoon. Chance of rain showers in the morning. Chance of sprinkles in the afternoon. Waves 2 to 4 feet. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 3 feet. .WEDNESDAY...Northwest wind 5 knots becoming southeast in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ150-190400- Outer Apostle Islands Beyond 5 NM from Mainland- 343 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM CDT THIS EVENING THROUGH TUESDAY AFTERNOON... .TONIGHT...Northeast wind 15 to 20 knots. Gusts up to 20 knots increasing to 25 knots late in the evening, then increasing to 30 knots after midnight decreasing to 25 knots late in the night. Chance of rain showers in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 2 feet building to 4 to 6 feet. Waves occasionally to 8 feet. .TUESDAY...North wind 5 to 10 knots with gusts to around 20 knots becoming west 10 to 15 knots with gusts to around 20 knots in the late morning and afternoon. Chance of rain showers in the morning. Chance of sprinkles in the afternoon. Waves 4 to 6 feet subsiding to 2 to 4 feet late in the afternoon. Waves occasionally to 7 feet. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 3 feet subsiding to 1 to 2 feet in the late evening and overnight. .WEDNESDAY...Northwest wind 5 knots becoming southeast in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ121-190400- Chequamegon Bay-Bayfield to Oak Point WI- 343 PM CDT Mon May 18 2026 .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the late evening and overnight. Rain showers likely in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 2 feet. .TUESDAY...Northwest wind 5 to 10 knots becoming west 10 to 15 knots with gusts to around 20 knots in the late morning and afternoon. Chance of rain showers in the morning. Chance of sprinkles in the afternoon. Waves 1 foot or less. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Gusts up to 20 knots early in the evening. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 foot or less. .WEDNESDAY...Northwest wind 5 knots becoming east in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ148-190400- Oak Point to Saxon Harbor WI- 343 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM CDT THIS EVENING THROUGH TUESDAY AFTERNOON... .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 25 knots in the late evening and early morning decreasing to 20 knots. Rain showers likely in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 3 feet building to 5 to 8 feet. Waves occasionally to 10 feet. .TUESDAY...Northwest wind 5 to 10 knots becoming west 10 to 15 knots with gusts to around 20 knots in the afternoon. Chance of rain showers in the morning. Chance of sprinkles in the afternoon. Waves 2 to 4 feet. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Gusts up to 20 knots early in the evening. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 3 feet. .WEDNESDAY...Northwest wind 5 knots becoming north late in the morning, then becoming east in the afternoon. Sunny. Waves 1 foot or less. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH  506 FZUS53 KGRR 182044 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 444 PM EDT Mon May 18 2026 For waters within five nautical miles of shore on Lake Michigan LMZ849-190800- Pentwater to Manistee MI- 444 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .THROUGH EARLY EVENING...South winds 20 to 25 knots. Mostly cloudy with a chance of showers and thunderstorms. Waves 3 to 5 feet. .TONIGHT...South winds to 30 knots. Partly cloudy in the evening, then rain showers likely and a chance of thunderstorms after midnight. Patchy fog after midnight. Waves 4 to 6 feet. .TUESDAY...South winds to 30 knots. Rain showers likely and a chance of thunderstorms. Patchy fog. Waves 5 to 7 feet. .TUESDAY NIGHT...West winds 10 to 20 knots veering north in the late evening and overnight. Partly cloudy. Waves 3 to 5 feet. .WEDNESDAY...North winds 15 to 25 knots. Sunny. Waves 2 to 3 feet. .WEDNESDAY NIGHT...Northeast winds 10 to 20 knots decreasing to 5 to 10 knots after midnight. Partly cloudy. Waves 2 to 3 feet. .THURSDAY...Northeast winds 5 to 10 knots backing north 10 to 15 knots early in the afternoon. Mostly sunny. Waves around 1 foot. .FRIDAY...East winds 10 to 20 knots. Mostly cloudy. Waves 1 foot or less. .SATURDAY...Northeast winds 10 to 15 knots. Mostly cloudy with a chance of rain showers. Waves 1 foot or less. $$ LMZ848-190800- Whitehall to Pentwater MI- 444 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .THROUGH EARLY EVENING...South winds 20 to 25 knots. Mostly cloudy with a chance of thunderstorms and a slight chance of rain showers. Waves 4 to 6 feet. .TONIGHT...South winds to 30 knots. Mostly cloudy with a chance of showers and thunderstorms. Patchy fog after midnight. Waves 4 to 6 feet. .TUESDAY...South winds to 30 knots. Rain showers likely and a chance of thunderstorms. Patchy fog. Waves 5 to 7 feet. .TUESDAY NIGHT...West winds 20 to 25 knots veering north 15 to 20 knots in the late evening and overnight. Partly cloudy. Waves 3 to 5 feet. .WEDNESDAY...North winds 15 to 25 knots. Sunny. Waves 2 to 4 feet. .WEDNESDAY NIGHT...North winds 15 to 25 knots veering northeast 10 to 15 knots in the late evening and overnight. Partly cloudy. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late evening and overnight. .THURSDAY...Northeast winds 10 to 15 knots backing north early in the afternoon. Mostly sunny. Waves around 1 foot. .FRIDAY...East winds 15 to 20 knots. Mostly cloudy. Waves around 1 foot. .SATURDAY...Northeast winds 15 to 20 knots. Mostly cloudy. Waves around 1 foot. $$ LMZ847-190800- Grand Haven to Whitehall MI- 444 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .THROUGH EARLY EVENING...South winds 20 to 25 knots. Rain showers likely and a chance of thunderstorms. Waves 3 to 5 feet. .TONIGHT...South winds to 30 knots. Mostly cloudy with a chance of showers and thunderstorms. Patchy fog after midnight. Waves 4 to 6 feet. .TUESDAY...Southwest winds to 30 knots. Rain showers likely and a chance of thunderstorms. Patchy fog. Waves 5 to 7 feet. .TUESDAY NIGHT...Northwest winds 15 to 25 knots veering north after midnight. Mostly cloudy. Waves 3 to 5 feet. .WEDNESDAY...North winds 15 to 25 knots. Sunny. Waves 2 to 4 feet. .WEDNESDAY NIGHT...North winds 15 to 25 knots veering northeast 10 to 15 knots after midnight. Partly cloudy. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late evening and overnight. .THURSDAY...East winds 10 to 15 knots backing north early in the afternoon. Mostly sunny. Waves 1 foot or less. .FRIDAY...East winds 15 to 20 knots. Mostly cloudy. Waves around 1 foot. .SATURDAY...East winds 15 to 20 knots backing northeast 10 to 15 knots early in the afternoon. Mostly cloudy with a chance of rain showers. Waves around 1 foot. $$ LMZ846-190800- Holland to Grand Haven MI- 444 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .THROUGH EARLY EVENING...South winds 20 to 25 knots. Mostly cloudy with a chance of showers and thunderstorms. Waves 3 to 5 feet. .TONIGHT...South winds to 30 knots. Mostly cloudy with a chance of showers and thunderstorms. Patchy fog after midnight. Waves 3 to 5 feet. .TUESDAY...Southwest winds to 30 knots. Rain showers likely and a chance of thunderstorms. Patchy fog. Waves 5 to 7 feet. .TUESDAY NIGHT...Northwest winds 15 to 20 knots veering north after midnight. Mostly cloudy. Waves 2 to 4 feet. .WEDNESDAY...North winds 15 to 25 knots. Mostly sunny. Waves 3 to 5 feet. .WEDNESDAY NIGHT...North winds 15 to 25 knots veering northeast around 15 knots after midnight. Partly cloudy. Waves 3 to 5 feet subsiding to 1 to 2 feet after midnight. .THURSDAY...Northeast winds 10 to 15 knots. Mostly sunny. Waves around 1 foot. .FRIDAY...East winds 15 to 20 knots. Mostly cloudy. Waves 1 to 2 feet. .SATURDAY...East winds 15 to 20 knots backing north 10 to 15 knots early in the afternoon. Mostly cloudy with a chance of rain showers. Waves around 1 foot. $$ LMZ845-190800- South Haven to Holland MI- 444 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT TUESDAY THROUGH TUESDAY EVENING... .THROUGH EARLY EVENING...South winds around 20 knots. Rain showers likely and a chance of thunderstorms. Waves 2 to 4 feet. .TONIGHT...South winds 15 to 25 knots. Mostly cloudy with a chance of showers and thunderstorms. Waves 2 to 4 feet. .TUESDAY...Southwest winds to 30 knots. Partly sunny with a chance of showers and thunderstorms. Waves 4 to 6 feet. .TUESDAY NIGHT...Northwest winds 15 to 20 knots veering north after midnight. Mostly cloudy. Waves 2 to 4 feet. .WEDNESDAY...North winds 15 to 25 knots. Mostly sunny. Waves 3 to 5 feet. .WEDNESDAY NIGHT...North winds 15 to 25 knots veering northeast around 15 knots after midnight. Partly cloudy. Waves 3 to 5 feet subsiding to 1 to 3 feet after midnight. .THURSDAY...Northeast winds 10 to 15 knots. Mostly sunny. Waves around 1 foot. .FRIDAY...East winds 15 to 20 knots. Mostly cloudy. Waves around 1 foot. .SATURDAY...Northeast winds 10 to 15 knots backing northwest early in the afternoon. Mostly cloudy with a chance of rain showers. Waves around 1 foot. $$ LMZ844-190800- St Joseph to South Haven MI- 444 PM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM EDT TUESDAY THROUGH TUESDAY EVENING... .THROUGH EARLY EVENING...Southwest winds around 20 knots. Rain showers likely and a chance of thunderstorms. Waves 2 to 3 feet. .TONIGHT...South winds 15 to 25 knots. Mostly cloudy with a chance of showers and thunderstorms. Waves 2 to 4 feet. .TUESDAY...Southwest winds 20 to 25 knots. Partly sunny with a chance of showers and thunderstorms. Waves 3 to 5 feet. .TUESDAY NIGHT...Northwest winds around 15 knots veering north after midnight. Mostly cloudy with rain showers likely and a chance of thunderstorms. Waves 2 to 4 feet. .WEDNESDAY...North winds 15 to 25 knots. Mostly sunny. Waves 3 to 5 feet. .WEDNESDAY NIGHT...North winds 15 to 25 knots veering northeast 10 to 15 knots in the late evening and overnight. Partly cloudy. Waves 3 to 5 feet. .THURSDAY...Northeast winds 10 to 15 knots. Mostly sunny. Waves 1 to 3 feet. .FRIDAY...East winds 15 to 20 knots. Mostly cloudy with a chance of rain showers. Waves around 1 foot. .SATURDAY...East winds 10 to 15 knots backing northwest early in the afternoon. Mostly cloudy. Waves 1 foot or less. $$  729 FZUS53 KLOT 182046 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 346 PM CDT Mon May 18 2026 For waters within five nautical miles of shore on Lake Michigan Waves are provided as a range of significant wave heights, which is the average of the highest 1/3 of the waves, along with the average height of the highest 10 percent of the waves which will occasionally be encountered. LMZ740>742-190345- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 346 PM CDT Mon May 18 2026 .TONIGHT...Southwest winds 15 to 25 kt becoming south. Chance of showers and slight chance of thunderstorms after midnight. Waves 2 to 4 ft. .TUESDAY...Southwest winds 15 to 25 kt becoming west in the afternoon. Chance of showers and slight chance of thunderstorms in the morning, then chance of showers and thunderstorms in the afternoon. Waves 3 to 5 ft subsiding to 2 to 4 ft. .TUESDAY NIGHT...Northwest winds 15 to 20 kt becoming north. Slight chance of showers and thunderstorms in the evening. Waves 1 to 3 ft building to 2 to 4 ft. .WEDNESDAY...North winds 15 to 20 kt becoming northeast. Partly cloudy. Waves 2 to 4 ft building to 3 to 5 ft. $$ LMZ743>745-190345- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 346 PM CDT Mon May 18 2026 .TONIGHT...South winds 15 to 25 kt. Chance of showers and slight chance of thunderstorms after midnight. Waves 2 to 4 ft. .TUESDAY...Southwest winds 15 to 25 kt. Slight chance of showers and thunderstorms in the morning, then chance of showers and thunderstorms in the afternoon. Waves 2 to 4 ft. .TUESDAY NIGHT...Northwest winds 15 to 20 kt becoming north. Showers likely and a chance of thunderstorms in the evening. Waves 2 to 4 ft. .WEDNESDAY...North winds 15 to 20 kt. Mostly cloudy in the morning, then becoming partly cloudy. Waves 3 to 5 ft. $$ KMD  196 FZUS53 KGRB 182056 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 356 PM CDT Mon May 18 2026 For waters within five nautical miles of shore on Lake Michigan LMZ521-522-190400- Green Bay south of line from Cedar River to Rock Island Passage and north of a line from Oconto WI to Little Sturgeon Bay WI- Green Bay south of line from Oconto WI to Little Sturgeon Bay WI- 356 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY EVENING... .LATE THIS AFTERNOON...SE wind 10 to 15 kts. Waves 2 ft or less. A slight chance of showers and thunderstorms. .TONIGHT...SE wind 10 to 15 kts veering S after midnight. Waves 2 ft or less. Patchy fog. a chance of showers and thunderstorms. .TUESDAY...SW wind 15 to 25 kts veering NW 10 to 15 kts early in the afternoon. Waves 1 to 3 ft. A chance of showers in the morning. .TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 2 ft or less. Mostly cloudy in the evening then becoming partly cloudy. .WEDNESDAY...N wind 10 to 15 kts veering E 5 to 10 kts early in the afternoon. Waves 2 ft or less. Mostly sunny. $$ LMZ541-190400- Rock Island Passage to Sturgeon Bay WI- 356 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 AM CDT TUESDAY THROUGH LATE TUESDAY NIGHT... .LATE THIS AFTERNOON...SE wind 5 to 10 kts. Waves 3 to 5 ft. Patchy fog. .TONIGHT...S wind 10 to 15 kts. Waves 2 to 4 ft building to 4 to 7 ft after midnight. Patchy dense fog in the evening. Areas of dense fog after midnight. a chance of showers in the evening. A chance of thunderstorms. Rain showers after midnight. .TUESDAY...SW wind 15 to 25 kts veering NW 10 to 20 kts early in the afternoon. Waves 4 to 7 ft. Patchy fog in the morning. a chance of showers. .TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 2 to 4 ft subsiding to 1 to 3 ft after midnight. Mostly cloudy in the evening then becoming partly cloudy. .WEDNESDAY...N wind 10 to 15 kts veering E 5 to 10 kts early in the afternoon. Waves 2 ft or less. Mostly sunny. $$ LMZ542-543-190400- Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI- 356 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 AM CDT TUESDAY THROUGH LATE TUESDAY NIGHT... .LATE THIS AFTERNOON...SE wind 5 to 10 kts. Waves 2 to 4 ft. Patchy fog. a slight chance of showers and thunderstorms. .TONIGHT...S wind 10 to 15 kts. Waves 2 to 4 ft building to 4 to 7 ft after midnight. Patchy fog. a chance of showers and thunderstorms. .TUESDAY...SW wind 15 to 25 kts veering W early in the afternoon. Waves 4 to 7 ft. Patchy fog in the morning. a chance of showers in the morning. .TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 2 to 4 ft. Mostly cloudy in the evening then becoming partly cloudy. .WEDNESDAY...N wind 10 to 15 kts veering NE in the late morning and afternoon. Waves 2 ft or less. Mostly sunny. $$ See Lake Michigan Open Lake Forecast for Thursday through Saturday. Wave height forecast is for ice free areas.