607 FZUS53 KLOT 181503 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 1003 AM 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>742-182115- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 1003 AM CDT Mon May 18 2026 ...SEVERE THUNDERSTORM WATCH 220 IN EFFECT UNTIL 5 PM CDT THIS AFTERNOON... .REST OF TODAY...Southwest winds 20 to 25 kt becoming south. Showers thunderstorms likely until early afternoon. Waves 2 to 4 ft. .TONIGHT...South winds 15 to 25 kt. Slight chance of showers and thunderstorms in the evening, then chance of showers and thunderstorms overnight. Waves 2 to 4 ft. .TUESDAY...Southwest winds 20 to 25 kt becoming west 15 to 25 kt in the afternoon. Chance of showers and thunderstorms. Waves 3 to 5 ft subsiding to 2 to 4 ft. A small craft advisory may be needed. .TUESDAY NIGHT...Northwest winds 15 to 20 kt becoming north overnight. Slight chance of showers in the evening. Waves 2 to 4 ft. $$ LMZ743>745-182115- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 1003 AM CDT Mon May 18 2026 ...SEVERE THUNDERSTORM WATCH 220 IN EFFECT UNTIL 5 PM CDT THIS AFTERNOON... .REST OF TODAY...Southwest winds 20 to 25 kt. Showers and thunderstorms ending early in the afternoon. Waves 2 to 4 ft. .TONIGHT...South winds 15 to 25 kt. Slight chance of showers and thunderstorms in the evening, then chance of showers and thunderstorms overnight. Waves 2 to 4 ft. .TUESDAY...Southwest winds 20 to 25 kt becoming west in the afternoon. Chance of showers and thunderstorms in the morning, then showers likely and a chance of thunderstorms in the afternoon. Waves 2 to 4 ft. A small craft advisory may be needed. .TUESDAY NIGHT...Northwest winds 15 to 20 kt becoming north overnight. Chance of showers and slight chance of thunderstorms in the evening. Waves 2 to 4 ft. $$ - Izzi  553 FZUS53 KMQT 181502 NSHMQT Nearshore Marine Forecast National Weather Service Marquette MI 1102 AM 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. LMZ221-182000- Green Bay North of line from Cedar River MI to Rock Island Passage- 1102 AM EDT Mon May 18 2026 .REST OF TODAY...South wind 10 to 15 knots with gusts up to 22 knots. Mostly cloudy. A slight chance of showers and thunderstorms by late morning, then a chance of showers and a slight chance of thunderstorms late. Patchy fog through the day. Waves 2 to 3 feet. .TONIGHT...South wind 10 to 20 knots. Gusts up to 28 knots after midnight. Cloudy. A chance of showers and a slight chance of thunderstorms through late evening, then a chance of showers and thunderstorms by midnight. Patchy fog through late evening. Areas of dense fog by midnight. Waves subsiding to 1 to 2 feet, then building to 2 to 4 feet. .TUESDAY...Southwest wind 15 to 20 knots veering northwest in the afternoon. Patchy dense fog in the morning. Cloudy with a chance of showers in the morning, then partly cloudy with a slight chance of showers in the afternoon. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .TUESDAY NIGHT...Northwest wind 10 to 20 knots. Mostly cloudy. Waves subsiding to 1 to 2 feet. $$ LMZ248-250-182000- Seul Choix Point to Point Detour MI- 5NM East of a line from Fairport MI to Rock Island Passage- 1102 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .REST OF TODAY...South wind 15 to 20 knots. Cloudy with a slight chance of showers and thunderstorms. Patchy fog. Waves 2 to 4 feet. .TONIGHT...South wind 10 to 15 knots with gusts up to 30 knots increasing to 15 to 25 knots late. Cloudy. Areas of dense fog through the night. A chance of showers in the evening. A chance of thunderstorms through the night. Showers likely after midnight. Waves building to 4 to 7 feet occasionally to 9 feet. .TUESDAY...Southwest wind 20 to 25 knots veering northwest 15 to 20 knots in the afternoon. Cloudy in the morning then becoming partly cloudy. Areas of dense fog in the morning. A chance of showers. Waves building to 5 to 8 feet occasionally to 10 feet, then subsiding to 3 to 5 feet occasionally to 7 feet. .TUESDAY NIGHT...Northwest wind 15 to 20 knots. Mostly cloudy. Waves subsiding to 1 to 2 feet. $$ LSZ240-241-182000- Saxon Harbor WI to Black River MI- Black River to Ontonagon MI- 1102 AM EDT Mon May 18 2026 /1002 AM CDT Mon May 18 2026/ .REST OF TODAY...North wind less than 10 knots veering northeast late. Cloudy with a slight chance of rain showers. Patchy fog. Waves 1 to 2 feet. .TONIGHT...Northeast wind 10 to 20 knots. A chance of rain showers and a slight chance of thunderstorms through late evening, then rain showers and a slight chance of thunderstorms by midnight. Patchy fog through the night. Waves building to 4 to 7 feet occasionally to 9 feet. .TUESDAY...Northwest wind 10 to 20 knots backing west 10 to 15 knots in the afternoon. Cloudy. A chance of rain showers in the morning. Waves subsiding to 2 to 3 feet. .TUESDAY NIGHT...Northwest wind less than 10 knots with gusts up to 18 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves subsiding to 1 to 2 feet. $$ LSZ242-243-182000- Ontonagon to Upper Entrance of Portage Canal MI- Upper Entrance of Portage Canal to Eagle River MI- 1102 AM EDT Mon May 18 2026 .REST OF TODAY...Northwest wind less than 10 knots veering northeast 10 to 15 knots late. Cloudy. Patchy fog through the day. A slight chance of rain showers late. Waves 1 to 2 feet. .TONIGHT...Northeast wind 10to 20 knots. A chance of rain showers and a slight chance of thunderstorms through late evening, then rain showers and a slight chance of thunderstorms by midnight. Patchy fog through the night. Waves building to 3 to 6 feet occasionally to 8 feet. .TUESDAY...Northwest wind 20 to 25 knots backing west 15 to 20 knots in the afternoon. Cloudy. Rain showers likely in the morning. Patchy fog in the morning. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 2 to 4 feet. .TUESDAY NIGHT...Northwest wind 10 to 20 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves subsiding to 1 to 2 feet. $$ LSZ245-182000- Manitou Island to Point Isabelle MI- 1102 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... .REST OF TODAY...West wind less than 10 knots veering north 10 to 15 knots late. Cloudy. Patchy fog through the day. A slight chance of rain showers late. Waves 2 to 4 feet subsiding to 1 to 2 feet. .TONIGHT...Northeast wind 10 to 15 knots. Patchy fog through late evening. Areas of dense fog by midnight. Patchy fog late. A slight chance of thunderstorms in the evening. Rain showers through the night. A chance of thunderstorms after midnight. Waves building to 2 to 4 feet. .TUESDAY...Northwest wind 15 to 25 knots becoming 20 to 25 knots in the afternoon. Cloudy. A chance of rain showers in the morning. Patchy fog in the morning. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 3 to 5 feet occasionally to 7 feet. .TUESDAY NIGHT...Northwest wind 10 to 20 knots with gusts up to 27 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves subsiding to 2 to 3 feet. $$ LSZ244-182000- Eagle River to Manitou Island MI- 1102 AM EDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON... ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... .REST OF TODAY...Northwest wind less than 10 knots veering north 10 to 15 knots late. Cloudy. Patchy dense fog through the day. A slight chance of rain showers late. Waves 2 to 4 feet subsiding to 2 to 3 feet. .TONIGHT...Northeast wind 15 to 20 knots veering east 10 to 15 knots late. A chance of rain showers and a slight chance of thunderstorms through late evening, then rain showers and a slight chance of thunderstorms by midnight. Patchy dense fog through the night. Waves building to 3 to 5 feet occasionally to 7 feet. .TUESDAY...North wind 15 to 25 knots backing northwest 20 to 25 knots in the afternoon. Cloudy. Rain showers likely in the morning. Patchy fog in the morning. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .TUESDAY NIGHT...Northwest wind 10 to 20 knots with gusts up to 27 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves subsiding to 2 to 4 feet. $$ LSZ246-182000- Point Isabelle to Lower Entrance of Portage Canal MI- 1102 AM EDT Mon May 18 2026 .REST OF TODAY...West wind less than 10 knots veering north late. Cloudy. Patchy fog through the day. A slight chance of rain showers late. Waves 2 to 4 feet subsiding to 1 to 2 feet. .TONIGHT...Northeast wind 10 to 15 knots. A chance of rain showers and a slight chance of thunderstorms through midnight, then rain showers and a slight chance of thunderstorms late. Patchy fog through the night. Waves 1 to 2 feet. .TUESDAY...Northwest wind 10 to 20 knots becoming 15 to 20 knots in the afternoon. Cloudy. Patchy fog in the morning. Rain showers likely in the morning, then a slight chance of rain showers in the afternoon. Waves building to 2 to 4 feet, then subsiding to 2 to 3 feet. .TUESDAY NIGHT...Northwest wind 10 to 20 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves subsiding to 1 to 2 feet. $$ LSZ247-182000- Lower Entrance of Portage Canal To Huron Islands MI Including Keweenaw and Huron Bays- 1102 AM EDT Mon May 18 2026 .REST OF TODAY...Northwest wind less than 10 knots veering northeast late. Cloudy. A slight chance of rain showers by late morning, then a chance of rain showers late. Patchy fog late. Waves 2 to 3 feet subsiding to 1 to 2 feet. .TONIGHT...Northeast wind 5 to 15 knots. A chance of rain showers and a slight chance of thunderstorms through late evening, then rain showers and a slight chance of thunderstorms by midnight. Patchy fog through the night. Waves 1 to 2 feet. .TUESDAY...Northwest wind 10 to 20 knots. Cloudy. A chance of rain showers in the morning. Patchy fog in the morning. Waves building to 2 to 4 feet. .TUESDAY NIGHT...Northwest wind 10 to 20 knots. Mostly cloudy. Waves subsiding to 1 to 2 feet. $$ LSZ248-182000- Huron Islands to Marquette MI- 1102 AM EDT Mon May 18 2026 .REST OF TODAY...West wind 10 to 15 knots veering north late. Cloudy. A slight chance of rain showers by late morning, then a chance of rain showers late. Patchy fog through the day. Waves 2 to 3 feet subsiding to 1 to 2 feet. .TONIGHT...North wind less than 10 knots veering southeast late. Gusts up to 18 knots. Patchy fog through the night. A slight chance of thunderstorms in the evening. Rain showers likely through the night. A chance of thunderstorms after midnight. Waves building to 2 to 3 feet. .TUESDAY...Northwest wind 15 to 25 knots. Mostly cloudy. A chance of rain showers and a slight chance of thunderstorms in the morning. Patchy fog in the morning. Waves building to 4 to 7 feet occasionally to 9 feet. .TUESDAY NIGHT...Northwest wind 15 to 25 knots. Mostly cloudy. Waves subsiding to 3 to 5 feet occasionally to 7 feet. $$ LSZ249-182000- Marquette to Munising MI- 1102 AM EDT Mon May 18 2026 .REST OF TODAY...Southwest wind 10 to 15 knots veering northwest late. Mostly cloudy. A slight chance of showers by late morning, then a chance of showers late. Patchy fog through the day. Waves 1 to 2 feet. .TONIGHT...Northwest wind less than 10 knots backing west by midnight, then backing south 5 to 15 knots late. Cloudy. A chance of rain showers and a slight chance of thunderstorms through midnight, then a chance of showers and thunderstorms late. Patchy fog through the night. Waves 1 to 2 feet. .TUESDAY...West wind up to 30 knots veering northwest in the afternoon. Mostly cloudy. Patchy fog in the morning. A chance of rain showers and a slight chance of thunderstorms in the morning, then a slight chance of rain showers in the afternoon. Waves building to 7 to 10 feet occasionally to 13 feet, then subsiding to 6 to 9 feet occasionally to 11 feet. .TUESDAY NIGHT...Northwest wind up to 30 knots. Mostly cloudy. Waves subsiding to 4 to 7 feet occasionally to 9 feet. $$ LSZ250-182000- Munising to Grand Marais MI- 1102 AM EDT Mon May 18 2026 .REST OF TODAY...Southwest wind 10 to 15 knots veering northwest less than 10 knots late. Mostly cloudy with a slight chance of showers. Patchy fog. Waves 1 to 2 feet. .TONIGHT...Northeast wind less than 10 knots veering south 5 to 15 knots by midnight. Cloudy. Patchy fog through the night. A chance of rain showers and a slight chance of thunderstorms in the evening. Rain showers likely and a chance of thunderstorms after midnight. Waves building to 1 to 2 feet. .TUESDAY...Southwest wind 15 to 25 knots veering northwest up to 30 knots in the afternoon. Mostly cloudy. Patchy fog in the morning. Rain showers likely and a slight chance of thunderstorms in the morning, then a slight chance of rain showers in the afternoon. Waves building to 7 to 10 feet occasionally to 13 feet. .TUESDAY NIGHT...Northwest wind 20 to 25 knots. Mostly cloudy. Waves subsiding to 4 to 7 feet occasionally to 9 feet. $$ LSZ251-182000- Grand Marais to Whitefish Point MI- 1102 AM EDT Mon May 18 2026 .REST OF TODAY...Southwest wind 10 to 15 knots veering west less than 10 knots late. Cloudy with a slight chance of showers. Patchy fog. Waves 2 to 3 feet subsiding to 1 to 2 feet. .TONIGHT...Southeast wind 5 to 15 knots. Cloudy. Patchy fog through the night. A slight chance of thunderstorms in the evening. A chance of rain showers through the night. A chance of thunderstorms after midnight. Waves calm to 1 foot. .TUESDAY...South wind 15 to 25 knots veering west up to 30 knots in the afternoon. Mostly cloudy. Patchy fog in the morning. Rain showers likely and a slight chance of thunderstorms in the morning, then a slight chance of rain showers in the afternoon. Waves building to 7 to 10 feet occasionally to 13 feet. .TUESDAY NIGHT...Northwest wind 20 to 25 knots. Mostly cloudy. Waves subsiding to 4 to 7 feet occasionally to 9 feet. $$ WFO MQT  750 FZUS53 KGRB 181507 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 1007 AM CDT Mon May 18 2026 For waters within five nautical miles of shore on Lake Michigan LMZ521-522-182200- 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- 1007 AM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY EVENING... .THIS AFTERNOON...S wind 10 to 15 kts. Waves 1 to 3 ft. A chance of showers and a slight chance of thunderstorms. .TONIGHT...S wind 10 to 15 kts. Waves 1 to 3 ft. Patchy fog. a chance of showers and thunderstorms. .TUESDAY...SW wind 15 to 25 kts veering NW early in the afternoon. Waves 2 to 4 ft. A chance of showers in the morning. .TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 1 to 3 ft. Mostly cloudy in the evening then becoming partly cloudy. $$ LMZ541-182200- Rock Island Passage to Sturgeon Bay WI- 1007 AM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TUESDAY NIGHT... .THIS AFTERNOON...S wind 10 to 20 kts. Waves 3 to 5 ft. Patchy fog. a chance of showers and a slight chance of thunderstorms. .TONIGHT...S wind 10 to 15 kts increasing to 15 to 25 kts after midnight. Waves 2 to 4 ft building to 4 to 7 ft after midnight. Patchy fog in the evening. Areas of dense fog after midnight. a chance of showers in the evening. A chance of thunderstorms. Rain showers likely after midnight. .TUESDAY...SW wind 15 to 25 kts veering NW early in the afternoon. Waves 4 to 7 ft. Patchy fog in the morning. a chance of showers in the morning. .TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 2 to 4 ft subsiding to 1 to 3 ft after midnight. Mostly cloudy in the evening then becoming partly cloudy. $$ LMZ542-543-182200- Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI- 1007 AM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TUESDAY NIGHT... .THIS AFTERNOON...S wind 15 to 25 kts decreasing to 10 to 15 kts early in the afternoon. Waves 3 to 5 ft. Patchy fog. a chance of showers and a slight chance of thunderstorms. .TONIGHT...S wind 10 to 15 kts increasing to 15 to 25 kts in the late evening and overnight. Waves 2 to 4 ft building to 3 to 5 ft after midnight. Patchy fog. a chance of showers and thunderstorms. .TUESDAY...SW wind 15 to 25 kts veering W in the late morning and 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. Partly cloudy. $$ See Lake Michigan Open Lake Forecast for Wednesday through Friday. Wave height forecast is for ice free areas.  915 FZUS53 KGRR 181531 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 1131 AM EDT Mon May 18 2026 For waters within five nautical miles of shore on Lake Michigan LMZ849-182100- Pentwater to Manistee MI- 1131 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .REST OF TODAY...South winds to 30 knots. Mostly cloudy with a chance of showers and thunderstorms. Waves 3 to 5 feet. .TONIGHT...South winds to 30 knots. Rain showers likely and a chance of thunderstorms. Patchy fog. Waves 4 to 6 feet. .TUESDAY...South winds to 30 knots veering southwest early in the afternoon. Rain showers likely and a chance of thunderstorms. Patchy fog. Waves 5 to 7 feet. .TUESDAY NIGHT...Northwest winds 15 to 25 knots veering north after midnight. Partly cloudy. Waves 3 to 5 feet. .WEDNESDAY...North winds 15 to 20 knots. Mostly sunny. Waves 2 to 3 feet. .THURSDAY...Northeast winds 5 to 10 knots backing north 10 to 15 knots early in the afternoon. Mostly sunny. Waves around 1 foot. .FRIDAY...East winds 10 to 15 knots. Mostly cloudy. Waves 1 foot or less. $$ LMZ848-182100- Whitehall to Pentwater MI- 1131 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .REST OF TODAY...South winds to 30 knots. Mostly cloudy with a chance of showers and thunderstorms. Waves 4 to 6 feet. .TONIGHT...South winds to 30 knots. Mostly cloudy with a chance of showers and thunderstorms. Patchy fog. Waves 4 to 6 feet. .TUESDAY...South winds to 30 knots veering southwest early in the afternoon. Rain showers likely and a chance of thunderstorms. Patchy fog. Waves 5 to 7 feet. .TUESDAY NIGHT...Northwest winds 20 to 25 knots veering north 15 to 20 knots after midnight. Partly cloudy. Waves 3 to 5 feet. .WEDNESDAY...North winds 15 to 25 knots. Mostly sunny. Waves 2 to 4 feet. .THURSDAY...Northeast winds 10 to 15 knots backing north early in the afternoon. Mostly sunny. Waves around 1 foot. .FRIDAY...East winds 10 to 15 knots. Mostly cloudy. Waves around 1 foot. $$ LMZ847-182100- Grand Haven to Whitehall MI- 1131 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .REST OF TODAY...South winds to 30 knots. Rain showers likely and a chance of thunderstorms. Waves 4 to 6 feet. .TONIGHT...South winds to 30 knots. Mostly cloudy with a chance of showers and thunderstorms. Waves 4 to 6 feet. .TUESDAY...South winds to 30 knots veering southwest early in the afternoon. Rain showers likely and a chance of thunderstorms. Patchy fog. Waves 5 to 7 feet. .TUESDAY NIGHT...Northwest winds 20 to 25 knots veering north after midnight. Partly cloudy. Waves 3 to 5 feet. .WEDNESDAY...North winds 15 to 25 knots. Mostly sunny. Waves 2 to 4 feet. .THURSDAY...East winds 10 to 15 knots backing north early in the afternoon. Mostly sunny. Waves 1 foot or less. .FRIDAY...East winds 10 to 20 knots. Mostly cloudy. Waves around 1 foot. $$ LMZ846-182100- Holland to Grand Haven MI- 1131 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .REST OF TODAY...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. Waves 3 to 5 feet. .TUESDAY...South winds to 30 knots veering southwest 20 to 25 knots early in the afternoon. Rain showers likely and a chance of thunderstorms. Patchy fog. Waves 5 to 7 feet. .TUESDAY NIGHT...Northwest winds around 20 knots. Partly cloudy. Waves 2 to 4 feet. .WEDNESDAY...North winds 15 to 25 knots. Mostly sunny. Waves 3 to 5 feet. .THURSDAY...Northeast winds 10 to 15 knots. Mostly sunny. Waves around 1 foot. .FRIDAY...East winds 15 to 20 knots. Mostly cloudy. Wavesaround 1 foot. $$ LMZ845-182100- South Haven to Holland MI- 1131 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY EVENING... .REST OF TODAY...South winds 20 to 25 knots. Rain showers likely and a chance of thunderstorms. Waves 2 to 4 feet. .TONIGHT...South winds 15 to 25 knots. Mostly cloudy with a chance of showers and thunderstorms. Waves 2 to 4 feet. .TUESDAY...Southwest winds to 30 knots. Partly sunny with a chance of showers and thunderstorms. Waves 4 to 6 feet. .TUESDAY NIGHT...West winds 15 to 20 knots veering northwest in the late evening and overnight. Partly cloudy with rain showers likely and a slight chance of thunderstorms. Waves 2 to 4 feet. .WEDNESDAY...North winds 15 to 25 knots. Mostly sunny. Waves 3 to 5 feet. .THURSDAY...Northeast winds 10 to 15 knots. Mostly sunny. Waves around 1 foot. .FRIDAY...East winds 10 to 15 knots. Mostly cloudy. Waves 1 foot or less. $$ LMZ844-182100- St Joseph to South Haven MI- 1131 AM EDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY EVENING... .REST OF TODAY...South 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 15 to 20 knots becoming around 20 knots after midnight. Mostly cloudy with a slight chance of showers and thunderstorms. Waves 2 to 4 feet. .WEDNESDAY...North winds 15 to 20 knots. Mostly sunny. Waves 3 to 5 feet. .THURSDAY...Northeast winds 10 to 15 knots. Mostly sunny. Waves 1 to 2 feet. .FRIDAY...East winds 10 to 15 knots. Mostly cloudy with a chance of rain showers. Waves around 1 foot. $$  610 FZUS53 KDLH 181548 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 1048 AM CDT Mon May 18 2026 For waters within five nautical miles of shore on Lake Superior. Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. LSZ140-182200- Grand Portage to Grand Marais MN- 1048 AM CDT Mon May 18 2026 .REST OF TODAY...East wind 5 to 10 knots. Mostly cloudy. Waves 1 to 3 feet. .TONIGHT...Northeast wind 15 to 20 knots. Gusts up to 20 knots increasing to 25 knots late in the evening, then increasing to 30 knots after midnight decreasing to 25 knots early in the morning. Slight chance of rain showers in the evening. Slight chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 3 feet building to 4 to 6 feet in the late evening and overnight. Waves occasionally to 8 feet. A small craft advisory may be needed. .TUESDAY...Northwest wind 10 to 15 knots with gusts to around 25 knots easing to 5 to 10 knots with gusts to around 20 knots in the afternoon. Chance of rain showers in the morning. Waves 4 to 6 feet subsiding to 1 to 2 feet. Waves occasionally to 8 feet. A small craft advisory may be needed. .TUESDAY NIGHT...Northwest wind 10 to 15 knots. Gusts up to 20 knots early in the evening. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 2 feet. $$ LSZ141-182200- Grand Marais to Taconite Harbor MN- 1048 AM CDT Mon May 18 2026 .REST OF TODAY...Southeast wind 5 knots becoming east in the afternoon. Mostly cloudy. Waves 1 to 3 feet. .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. 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. $$ LSZ142-182200- Taconite Harbor to Silver Bay Harbor MN- 1048 AM CDT Mon May 18 2026 .REST OF TODAY...West wind 5 knots becoming northeast in the afternoon. Mostly cloudy. Waves 1 to 3 feet. .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots increasing to 25 knots after midnight. Chance of rain showers in the evening. Slight chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 2 feet building to 2 to 4 feet after midnight. A small craft advisory may be needed. .TUESDAY...West wind 5 to 10 knots. Gusts up to 20 knots in the afternoon. Chance of rain showers in the morning. Waves 2 to 4 feet subsiding to 1 to 3 feet late in the afternoon. A small craft advisory may be needed. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Gusts up to 20 knots early in the evening. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 2 feet. $$ LSZ143-182200- Silver Bay Harbor to Two Harbors MN- 1048 AM CDT Mon May 18 2026 .REST OF TODAY...Northwest wind 5 knots becoming northeast in the afternoon. Mostly cloudy. Waves 1 to 3 feet. .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 early in the morning. 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. A small craft advisory may be needed. .TUESDAY...West wind 5 to 10 knots. Gusts up to 20 knots in the afternoon. Chance of rain showers in the morning. Waves 2 to 4 feet. A small craft advisory may be needed. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Mostly cloudy in the evening then clearing. Waves 1 to 2 feet. $$ LSZ144-182200- Two Harbors to Duluth MN- 1048 AM CDT Mon May 18 2026 .REST OF TODAY...North wind 5 knots becoming east in the afternoon. Mostly cloudy. Waves 1 to 3 feet. .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots increasing to 25 knots after midnight, then decreasing to 20 knots early in the morning. Rain showers likely in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 2 feet building to 2 to 4 feet in the late evening and overnight. A small craft advisory may be needed. .TUESDAY...West wind 10 to 15 knots. Gusts up to 20 knots in the late morning and afternoon. Chance of rain showers in the morning. Waves 2 to 4 feet. .TUESDAY NIGHT...Northwest wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots after midnight. Mostly cloudy in the evening then clearing. Waves 1 to 2 feet. $$ LSZ145-182200- Duluth MN to Port Wing WI- 1048 AM CDT Mon May 18 2026 .REST OF TODAY...Northeast wind 5 to 10 knots. Mostly cloudy. Waves 1 to 3 feet. .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 early in the morning. 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 in the late evening and overnight. A small craft advisory may be needed. .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. .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 3 feet. $$ LSZ146-182200- Port Wing to Sand Island WI- 1048 AM CDT Mon May 18 2026 .REST OF TODAY...North wind 5 knots becoming northeast in the afternoon. Mostly cloudy. Waves 1 to 3 feet subsiding to 1 to 2 feet in the afternoon. .TONIGHT...Northeast wind 10 to 15 knots easing to 10 knots early in the morning. Gusts up to 20 knots late in the evening increasing to 25 knots, then decreasing to 20 knots early in the morning. Rain showers likely in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 2 feet building to 3 to 5 feet after midnight. A small craft advisory may be needed. .TUESDAY...Northwest wind 5 to 10 knots becoming west with gusts to around 20 knots in the late morning and afternoon. Chance of rain showers in the morning. Waves 3 to 5 feet subsiding to 1 to 3 feet late in the afternoon. A small craft advisory may be needed. .TUESDAY NIGHT...West wind 5 to 10 knots. Mostly cloudy in the evening then clearing. Waves 1 to 2 feet. $$ LSZ147-182200- Sand Island to Bayfield WI- 1048 AM CDT Mon May 18 2026 .REST OF TODAY...North wind 5 to 10 knots becoming northeast in the afternoon. Mostly cloudy. Waves 1 to 3 feet. .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 3 to 5 feet after midnight. A small craft advisory may be needed. .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. Waves 3 to 5 feet subsiding to 1 to 3 feet late in the afternoon. A small craft advisory may be needed. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 2 feet. $$ LSZ150-182200- Outer Apostle Islands Beyond 5 NM from Mainland- 1048 AM CDT Mon May 18 2026 .REST OF TODAY...Northeast wind 5 to 10 knots. Mostly cloudy. Waves 1 to 3 feet. .TONIGHT...Northeast wind 15 to 20 knots. Gusts up to 20 knots increasing to 25 knots late in the evening, then increasing to 30 knots after midnight decreasing to 25 knots early in the morning. Chance of rain showers in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 3 feet building to 5 to 8 feet. Waves occasionally to 10 feet. A small craft advisory may be needed. .TUESDAY...North wind 5 to 10 knots with gusts to around 20 knots becoming west 10 to 15 knots with gusts to around 20 knots in the late morning and afternoon. Chance of rain showers in the morning. Waves 4 to 7 feet subsiding to 2 to 4 feet late in the afternoon. Waves occasionally to 9 feet. A small craft advisory may be needed. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 3 feet. $$ LSZ121-182200- Chequamegon Bay-Bayfield to Oak Point WI- 1048 AM CDT Mon May 18 2026 .REST OF TODAY...Northeast wind 5 to 10 knots. Mostly cloudy. Waves 1 to 3 feet. .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 3 feet building to 4 to 7 feet. Waves occasionally to 10 feet. A small craft advisory may be needed. .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. Waves 1 to 2 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 foot or less. $$ LSZ148-182200- Oak Point to Saxon Harbor WI- 1048 AM CDT Mon May 18 2026 .REST OF TODAY...Northeast wind 5 to 10 knots. Mostly cloudy. Waves 1 to 3 feet. .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 25 knots in the late evening and early morning decreasing to 20 knots. Rain showers likely in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 3 feet building to 5 to 8 feet. Waves occasionally to 10 feet. A small craft advisory may be needed. .TUESDAY...Northwest wind 5 to 10 knots becoming west 10 to 15 knots with gusts to around 20 knots in the afternoon. Chance of rain showers in the morning. Waves 4 to 6 feet. Waves occasionally to 8 feet. A small craft advisory may be needed. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Gusts up to 20 knots early in the evening. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 3 feet subsiding to 1 to 2 feet in the late evening and overnight. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH  919 FZUS53 KGRB 181556 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 1056 AM CDT Mon May 18 2026 For waters within five nautical miles of shore on Lake Michigan LMZ521-522-182200- 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- 1056 AM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY EVENING... .THIS AFTERNOON...SW wind 5 to 10 kts backing SE early in the afternoon. Waves 1 to 3 ft. A chance of showers and thunderstorms. .TONIGHT...S wind 10 to 15 kts. Waves 1 to 3 ft. 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 2 to 4 ft. A chance of showers in the morning. .TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 1 to 3 ft. Mostly cloudy in the evening then becoming partly cloudy. $$ LMZ541-182200- Rock Island Passage to Sturgeon Bay WI- 1056 AM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TUESDAY NIGHT... .THIS AFTERNOON...S wind 5 to 10 kts. Waves 3 to 5 ft. Patchy fog. a chance of showers and thunderstorms. .TONIGHT...S wind 10 to 15 kts. Waves 2 to 4 ft building to 4 to 7 ft after midnight. Patchy dense fog in the evening. Areas of dense fog after midnight. a chance of showers in the evening. A chance of thunderstorms. Rain showers after midnight. .TUESDAY...SW wind 15 to 25 kts veering NW 10 to 20 kts early in the afternoon. Waves 4 to 7 ft. Patchy fog in the morning. a chance of showers. .TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 2 to 4 ft subsiding to 1 to 3 ft after midnight. Mostly cloudy in the evening then becoming partly cloudy. $$ LMZ542-543-182200- Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI- 1056 AM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TUESDAY NIGHT... .THIS AFTERNOON...S wind 10 to 15 kts. Waves 3 to 5 ft. Patchy fog. a chance of showers and a slight chance of thunderstorms. .TONIGHT...S wind 10 to 15 kts. Waves 2 to 4 ft building to 3 to 5 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. $$ See Lake Michigan Open Lake Forecast for Wednesday through Friday. Wave height forecast is for ice free areas.