FZUS53 KDLH 211311 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 811 AM 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. LSZ140-212200- Grand Portage to Grand Marais MN- 811 AM CDT Thu May 21 2026 .REST OF TODAY...East wind 5 to 10 knots. Mostly sunny. Waves 1 foot or less. .TONIGHT...Northeast wind 5 to 10 knots. Partly cloudy 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 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 25 knots decreasing to 20 knots after midnight. Chance of rain showers after midnight. Waves 3 to 5 feet. A small craft advisory may be needed. $$ LSZ141-212200- Grand Marais to Taconite Harbor MN- 811 AM CDT Thu May 21 2026 .REST OF TODAY...East wind 5 to 10 knots. Mostly sunny. Waves 1 foot or less. .TONIGHT...Northeast wind 5 to 10 knots. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 2 feet. .FRIDAY...East wind 15 to 20 knots with gusts to around 25 knots. Mostly sunny. Waves 1 to 3 feet building to 3 to 5 feet late in the afternoon. A small craft advisory may be needed. .FRIDAY NIGHT...East wind 15 to 20 knots. Gusts up to 30 knots decreasing to 20 knots. Chance of rain showers after midnight. Waves 3 to 5 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. $$ LSZ142-212200- Taconite Harbor to Silver Bay Harbor MN- 811 AM CDT Thu May 21 2026 .REST OF TODAY...Northeast wind 5 to 10 knots. Mostly sunny. Waves 1 foot or less. .TONIGHT...Northeast wind 5 to 10 knots. Partly cloudy 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 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 easing to 5 to 10 knots with gusts to around 20 knots early in the morning. Slight chance of rain showers in the evening, then rain showers likely after midnight. Waves 3 to 5 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. $$ LSZ143-212200- Silver Bay Harbor to Two Harbors MN- 811 AM CDT Thu May 21 2026 .REST OF TODAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots late. Mostly sunny. Waves 1 to 2 feet. .TONIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots early in the morning. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 2 feet. .FRIDAY...Northeast wind 15 to 20 knots with gusts to around 25 knots. Mostly sunny. Waves 1 to 2 feet building to 2 to 4 feet in the afternoon. A small craft advisory may be needed. .FRIDAY NIGHT...Northeast wind 15 to 20 knots. Gusts up to 25 knots decreasing to 20 knots after midnight. Slight chance of rain showers in the evening, then rain showers likely after midnight. Waves 3 to 5 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. $$ LSZ144-212200- Two Harbors to Duluth MN- 811 AM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM CDT THIS AFTERNOON THROUGH THIS EVENING... .REST OF TODAY...Northeast wind 10 to 15 knots. Gusts up to 25 knots. Mostly sunny. Waves 1 to 3 feet. .TONIGHT...Northeast wind 15 to 20 knots with gusts to around 25 knots easing to 5 to 10 knots after midnight. Partly cloudy in the evening then becoming mostly 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 3 to 5 feet in the afternoon. Waves occasionally to 7 feet. A small craft advisory may be needed. .FRIDAY NIGHT...Northeast wind 15 to 20 knots. Gusts up to 25 knots decreasing to 20 knots after midnight. Chance of rain showers through the night. Waves 3 to 5 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. $$ LSZ145-212200- Duluth MN to Port Wing WI- 811 AM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM CDT THIS AFTERNOON THROUGH THIS EVENING... .REST OF TODAY...Northeast wind 10 to 15 knots. Gusts up to 25 knots late. Mostly sunny. Waves 1 to 2 feet building to 1 to 3 feet late. .TONIGHT...Northeast wind 15 to 20 knots with gusts to around 25 knots easing to 5 to 10 knots after midnight. Partly cloudy in the evening then becoming mostly cloudy. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late evening and overnight. .FRIDAY...Northeast wind 15 to 20 knots with gusts to around 25 knots. Mostly sunny. Waves 1 to 2 feet building to 3 to 5 feet in the afternoon. Waves occasionally to 7 feet. A small craft advisory may be needed. .FRIDAY NIGHT...Northeast wind 15 to 20 knots. Gusts up to 25 knots decreasing to 20 knots after midnight. Chance of rain showers through the night. Waves 3 to 5 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. $$ LSZ146-212200- Port Wing to Sand Island WI- 811 AM CDT Thu May 21 2026 .REST OF TODAY...East wind 5 knots becoming northeast 10 to 15 knots with gusts to around 20 knots in the late morning and afternoon. Mostly sunny. Waves 1 to 3 feet. .TONIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots early in the morning. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 3 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. .FRIDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the evening. Slight chance of rain showers in the evening, then rain showers likely after midnight. Waves 3 to 5 feet. A small craft advisory may be needed. $$ LSZ147-212200- Sand Island to Bayfield WI- 811 AM CDT Thu May 21 2026 .REST OF TODAY...Southeast wind 5 knots becoming northeast 10 to 15 knots in the afternoon. Mostly sunny. Waves 1 to 2 feet. .TONIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots becoming north 5 knots early in the morning. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 2 feet. .FRIDAY...Northeast wind 15 to 20 knots. Mostly sunny. Waves 1 to 2 feet building to 2 to 4 feet late in the afternoon. A small craft advisory may be needed. .FRIDAY NIGHT...East wind 10 to 15 knots. Gusts up to 20 knots in the evening. Rain showers likely after midnight. Waves 3 to 5 feet subsiding to 1 to 3 feet early in the morning. A small craft advisory may be needed. $$ LSZ150-212200- Outer Apostle Islands Beyond 5 NM from Mainland- 811 AM CDT Thu May 21 2026 .REST OF TODAY...Southeast wind 5 knots becoming northeast 10 to 15 knots with gusts to around 20 knots in the afternoon. Sunny. Waves 1 to 2 feet. .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 3 feet building to 3 to 5 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 after midnight. Rain showers likely after midnight. Waves 4 to 6 feet subsiding to 2 to 4 feet early in the morning. Waves occasionally to 8 feet. A small craft advisory may be needed. $$ LSZ121-212200- Chequamegon Bay-Bayfield to Oak Point WI- 811 AM CDT Thu May 21 2026 .REST OF TODAY...South wind 5 knots becoming southeast late in the morning, then becoming northeast 10 to 15 knots with gusts to around 20 knots in the afternoon. Mostly sunny. Waves 1 to 2 feet. .TONIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots becoming south 5 knots after midnight. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 3 feet. .FRIDAY...Northeast wind 15 to 20 knots. Mostly sunny. Waves 1 to 2 feet building to 2 to 4 feet late in the afternoon. .FRIDAY NIGHT...East wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots early in the morning. Slight chance of rain showers in the evening, then rain showers likely after midnight. Waves 2 to 4 feet subsiding to 1 to 2 feet in the late evening and overnight. A small craft advisory may be needed. $$ LSZ148-212200- Oak Point to Saxon Harbor WI- 811 AM CDT Thu May 21 2026 .REST OF TODAY...South wind 5 knots becoming east late in the morning, then becoming northeast 10 to 15 knots with gusts to around 20 knots in the afternoon. Mostly sunny. Waves 1 to 2 feet. .TONIGHT...East wind 10 to 15 knots with gusts to around 20 knots becoming southeast 5 knots after midnight. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 3 feet. .FRIDAY...Northeast wind 15 to 20 knots. Mostly sunny. Waves 1 to 2 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. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH