FZUS53 KDLH 181836 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 136 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. LSZ140-182200- Grand Portage to Grand Marais MN- 136 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM CDT THIS EVENING THROUGH TUESDAY AFTERNOON... .REST OF TODAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots early in the afternoon. 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 2 feet building to 3 to 5 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. $$ LSZ141-182200- Grand Marais to Taconite Harbor MN- 136 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM CDT THIS EVENING THROUGH TUESDAY AFTERNOON... .REST OF TODAY...Southwest wind 5 knots becoming northeast late. Mostly cloudy. Waves 1 to 3 feet. .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 25 knots in the late evening and early morning decreasing to 20 knots. Chance of rain showers in the evening. Slight chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 3 feet building to 2 to 4 feet after midnight. .TUESDAY...Northwest wind 5 to 10 knots. Gusts up to 20 knots in the afternoon. Chance of rain showers in the morning. Chance of sprinkles in the afternoon. Waves 1 to 3 feet subsiding to 1 to 2 feet in the late morning and afternoon. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Gusts up to 20 knots early in the evening. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 2 feet. $$ LSZ142-182200- Taconite Harbor to Silver Bay Harbor MN- 136 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM CDT THIS EVENING THROUGH TUESDAY AFTERNOON... .REST OF TODAY...East wind 5 knots becoming northeast late. 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. .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. $$ LSZ143-182200- Silver Bay Harbor to Two Harbors MN- 136 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM CDT THIS EVENING THROUGH TUESDAY AFTERNOON... .REST OF TODAY...Southwest wind 5 knots becoming northeast late. Mostly cloudy. Waves 1 to 3 feet. .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots late in the evening increasing to 25 knots, then decreasing to 20 knots early in the morning. Chance of rain showers in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 2 feet building to 2 to 4 feet after midnight. .TUESDAY...West wind 5 to 10 knots. Gusts up to 20 knots in the afternoon. Chance of rain showers in the morning. Chance of sprinkles in the afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Mostly cloudy in the evening then clearing. Waves 1 to 2 feet. $$ LSZ144-182200- Two Harbors to Duluth MN- 136 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM CDT THIS EVENING THROUGH TUESDAY MORNING... .REST OF TODAY...Northwest wind 5 knots becoming northeast late. Mostly cloudy. Waves 1 to 2 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 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. $$ LSZ145-182200- Duluth MN to Port Wing WI- 136 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM CDT THIS EVENING THROUGH TUESDAY MORNING... .REST OF TODAY...North wind 5 knots becoming northeast late. Mostly cloudy. Waves 1 to 2 feet. .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots late in the evening increasing to 25 knots, then decreasing to 20 knots early in the morning. Rain showers likely in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 3 feet building to 2 to 4 feet after midnight. .TUESDAY...West wind 10 to 15 knots. Gusts up to 20 knots in the late morning and afternoon. Chance of rain showers in the morning. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .TUESDAY NIGHT...Northwest wind 10 to 15 knots with gusts to around 20 knots becoming west 5 knots after midnight. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 2 feet. $$ LSZ146-182200- Port Wing to Sand Island WI- 136 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM CDT THIS EVENING THROUGH TUESDAY MORNING... .REST OF TODAY...North wind 5 knots becoming northeast late. Mostly cloudy. Waves 1 to 2 feet. .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. .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. $$ LSZ147-182200- Sand Island to Bayfield WI- 136 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM CDT THIS EVENING THROUGH TUESDAY MORNING... .REST OF TODAY...Northeast wind 5 to 10 knots. Mostly cloudy. Waves 1 to 2 feet. .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 25 knots in the late evening and early morning decreasing to 20 knots. Rain showers likely in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 2 feet building to 3 to 5 feet after midnight. .TUESDAY...North wind 5 to 10 knots becoming west with gusts to around 20 knots in the late morning and afternoon. Chance of rain showers in the morning. Chance of sprinkles in the afternoon. Waves 2 to 4 feet. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 3 feet. $$ LSZ150-182200- Outer Apostle Islands Beyond 5 NM from Mainland- 136 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM CDT THIS EVENING THROUGH TUESDAY AFTERNOON... .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 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. $$ LSZ121-182200- Chequamegon Bay-Bayfield to Oak Point WI- 136 PM CDT Mon May 18 2026 .REST OF TODAY...Northeast wind 5 to 10 knots. Mostly cloudy. Waves 1 foot or less. .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the late evening and overnight. Rain showers likely in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 2 feet. .TUESDAY...Northwest wind 5 to 10 knots becoming west 10 to 15 knots with gusts to around 20 knots in the late morning and afternoon. Chance of rain showers in the morning. Chance of sprinkles in the afternoon. Waves 1 foot or less. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Gusts up to 20 knots early in the evening. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 foot or less. $$ LSZ148-182200- Oak Point to Saxon Harbor WI- 136 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM CDT THIS EVENING THROUGH TUESDAY AFTERNOON... .REST OF TODAY...East wind 5 knots becoming northeast late. 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. .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. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH