FZUS53 KDLH 212322 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 622 PM CDT Thu May 21 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. LSZ140-221000- Grand Portage to Grand Marais MN- 622 PM CDT Thu May 21 2026 .REST OF TONIGHT...Northeast wind 5 to 10 knots. Mostly clear early in the evening then becoming mostly cloudy. Waves 1 to 2 feet. .FRIDAY...Northeast wind 15 to 20 knots with gusts to around 25 knots. Mostly sunny. Waves 1 to 2 feet building to 1 to 3 feet late in the afternoon. .FRIDAY NIGHT...East wind 15 to 20 knots. Gusts up to 30 knots decreasing to 20 knots. Chance of rain showers after midnight. Waves 3 to 5 feet. A small craft advisory may be needed. .SATURDAY...East wind 10 to 15 knots. Gusts up to 20 knots in the morning. Rain showers. Waves 2 to 4 feet. $$ LSZ141-221000- Grand Marais to Taconite Harbor MN- 622 PM CDT Thu May 21 2026 .REST OF TONIGHT...Northeast wind 5 to 10 knots. Partly cloudy then becoming mostly cloudy in the late evening and early morning then becoming partly cloudy. Waves 1 to 2 feet. .FRIDAY...East wind 15 to 20 knots with gusts to around 25 knots. Mostly sunny. Waves 1 to 3 feet building to 2 to 4 feet late in the afternoon. A small craft advisory may be needed. .FRIDAY NIGHT...East wind 15 to 20 knots. Gusts up to 30 knots decreasing to 20 knots after midnight. Rain showers likely after midnight. Waves 3 to 5 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. .SATURDAY...East wind 10 to 15 knots. Gusts up to 20 knots until late afternoon. Rain showers. Waves 2 to 4 feet subsiding to 1 to 3 feet late in the afternoon. $$ LSZ142-221000- Taconite Harbor to Silver Bay Harbor MN- 622 PM CDT Thu May 21 2026 .REST OF TONIGHT...Northeast wind 5 to 10 knots. Partly cloudy then becoming mostly cloudy in the late evening and early morning then becoming partly cloudy. Waves 1 to 2 feet. .FRIDAY...Northeast wind 15 to 20 knots with gusts to around 25 knots. Mostly sunny. Waves 1 to 3 feet building to 2 to 4 feet late in the afternoon. A small craft advisory may be needed. .FRIDAY NIGHT...Northeast wind 15 to 20 knots with gusts to around 25 knots becoming east 5 to 10 knots with gusts to around 20 knots early in the morning. Rain showers after midnight. Waves 3 to 5 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. .SATURDAY...Northeast wind 5 to 10 knots. Gusts up to 20 knots in the morning. Rain showers. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. $$ LSZ143-221000- Silver Bay Harbor to Two Harbors MN- 622 PM CDT Thu May 21 2026 .REST OF TONIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots toward daybreak. Mostly cloudy until early morning then becoming partly cloudy. Waves 1 to 3 feet. .FRIDAY...Northeast wind 15 to 20 knots with gusts to around 25 knots. Mostly sunny. Waves 1 to 2 feet building to 2 to 4 feet in the afternoon. A small craft advisory may be needed. .FRIDAY NIGHT...Northeast wind 15 to 20 knots with gusts to around 25 knots easing to 10 to 15 knots with gusts to around 20 knots after midnight. Chance of rain showers in the evening, then rain showers after midnight. Waves 3 to 5 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. .SATURDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots early in the morning. Rain showers likely in the morning, then chance of rain showers in the afternoon. Waves 1 to 3 feet. $$ LSZ144-221000- Two Harbors to Duluth MN- 622 PM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING... .REST OF TONIGHT...Northeast wind 10 to 15 knots with gusts to around 25 knots easing to 5 knots toward daybreak. Mostly cloudy. Waves 2 to 4 feet subsiding to 1 to 2 feet after midnight. .FRIDAY...Northeast wind 15 to 20 knots with gusts to around 25 knots. Mostly sunny. Waves 1 to 2 feet building to 3 to 5 feet in the afternoon. A small craft advisory may be needed. .FRIDAY NIGHT...Northeast wind 20 to 25 knots with gusts to around 30 knots easing to 10 to 15 knots with gusts to around 20 knots after midnight. Chance of rain showers in the evening, then rain showers after midnight. Waves 4 to 6 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. .SATURDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the morning. Rain showers likely. Waves 1 to 3 feet. $$ LSZ145-221000- Duluth MN to Port Wing WI- 622 PM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING... .REST OF TONIGHT...Northeast wind 10 to 15 knots with gusts to around 25 knots easing to 5 knots toward daybreak. Mostly cloudy then becoming partly cloudy late in the evening then becoming mostly cloudy. Waves 2 to 4 feet subsiding to 1 to 2 feet after midnight. .FRIDAY...Northeast wind 15 to 20 knots with gusts to around 25 knots. Mostly sunny. Waves 1 to 3 feet building to 3 to 5 feet in the afternoon. Waves occasionally to 7 feet. A small craft advisory may be needed. .FRIDAY NIGHT...Northeast wind 20 to 25 knots with gusts to around 30 knots easing to 10 to 15 knots with gusts to around 20 knots after midnight. Chance of rain showers in the evening, then rain showers after midnight. Waves 4 to 6 feet subsiding to 1 to 3 feet early in the morning. Waves occasionally to 7 feet. A small craft advisory may be needed. .SATURDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the morning. Rain showers in the morning, then rain showers likely in the afternoon. Waves 1 to 3 feet. $$ LSZ146-221000- Port Wing to Sand Island WI- 622 PM CDT Thu May 21 2026 .REST OF TONIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots toward daybreak. Mostly cloudy. Waves 1 to 3 feet subsiding to 1 to 2 feet in the late evening and overnight. .FRIDAY...Northeast wind 15 to 20 knots. Mostly sunny. Waves 1 to 2 feet building to 2 to 4 feet in the afternoon. A small craft advisory may be needed. .FRIDAY NIGHT...Northeast wind 15 to 20 knots becoming east 5 to 10 knots after midnight. Rain showers after midnight. Waves 3 to 5 feet. A small craft advisory may be needed. .SATURDAY...Northeast wind 5 to 10 knots. Rain showers likely in the morning, then slight chance of rain showers in the afternoon. Waves 1 to 2 feet. $$ LSZ147-221000- Sand Island to Bayfield WI- 622 PM CDT Thu May 21 2026 .REST OF TONIGHT...Northeast wind 5 to 10 knots. Gusts up to 20 knots early in the evening. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 2 feet. .FRIDAY...Northeast wind 15 to 20 knots. Mostly sunny. Waves 1 to 3 feet building to 2 to 4 feet late in the afternoon. A small craft advisory may be needed. .FRIDAY NIGHT...East wind 15 to 20 knots with gusts to around 25 knots easing to 5 to 10 knots with gusts to around 20 knots in the late evening and overnight. Rain showers likely after midnight. Waves 3 to 5 feet subsiding to 1 to 3 feet early in the morning. A small craft advisory may be needed. .SATURDAY...East wind 5 to 10 knots. Rain showers through the day. Waves 1 to 2 feet. $$ LSZ150-221000- Outer Apostle Islands Beyond 5 NM from Mainland- 622 PM CDT Thu May 21 2026 .REST OF TONIGHT...East wind 10 to 15 knots with gusts to around 20 knots becoming southeast 5 to 10 knots after midnight. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 3 feet. .FRIDAY...East wind 15 to 20 knots with gusts to around 25 knots. Mostly sunny. Waves 1 to 2 feet building to 3 to 5 feet in the afternoon. A small craft advisory may be needed. .FRIDAY NIGHT...East wind 15 to 20 knots with gusts to around 25 knots easing to 5 to 10 knots with gusts to around 20 knots after midnight. Rain showers likely after midnight. Waves 4 to 6 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. .SATURDAY...East wind 5 to 10 knots. Gusts up to 20 knots early in the morning. Rain showers likely in the morning, then slight chance of rain showers in the afternoon. Waves 1 to 3 feet. $$ LSZ121-221000- Chequamegon Bay-Bayfield to Oak Point WI- 622 PM CDT Thu May 21 2026 .REST OF TONIGHT...Northeast wind 5 to 10 knots with gusts to around 20 knots becoming south after midnight. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 2 feet. .FRIDAY...Northeast wind 15 to 20 knots. Mostly sunny. Waves 1 to 2 feet. .FRIDAY NIGHT...East wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots early in the morning. Slight chance of rain showers after midnight. Waves 1 to 2 feet. .SATURDAY...East wind 5 knots. Rain showers likely in the morning, then slight chance of rain showers in the afternoon. Waves 1 foot or less. $$ LSZ148-221000- Oak Point to Saxon Harbor WI- 622 PM CDT Thu May 21 2026 .REST OF TONIGHT...Northeast wind 5 to 10 knots with gusts to around 20 knots becoming southeast after midnight. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 3 feet. .FRIDAY...Northeast wind 5 to 10 knots rising to 15 to 20 knots in the afternoon. Mostly sunny. Waves 1 to 3 feet building to 2 to 4 feet late in the afternoon. .FRIDAY NIGHT...East wind 10 to 15 knots. Gusts up to 20 knots early in the evening. Rain showers likely after midnight. Waves 2 to 4 feet subsiding to 1 to 3 feet after midnight. A small craft advisory may be needed. .SATURDAY...East wind 5 to 10 knots. Rain showers likely in the morning, then chance of rain showers in the afternoon. Waves 1 to 2 feet. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH