FZUS53 KDLH 211613 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 1113 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- 1113 AM CDT Thu May 21 2026 .REST OF TODAY...East wind 5 to 10 knots. 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 30 knots decreasing to 20 knots. Chance of rain showers after midnight. Waves 3 to 5 feet. A small craft advisory may be needed. $$ LSZ141-212200- Grand Marais to Taconite Harbor MN- 1113 AM CDT Thu May 21 2026 .REST OF TODAY...East wind 5 to 10 knots. Sunny. Waves 1 foot or less. .TONIGHT...Northeast wind 5 to 10 knots. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 2 feet. .FRIDAY...East wind 15 to 20 knots with gusts to around 25 knots. Mostly sunny. Waves 1 to 3 feet building to 3 to 5 feet late in the afternoon. A small craft advisory may be needed. .FRIDAY NIGHT...East wind 15 to 20 knots. Gusts up to 30 knots decreasing to 20 knots after midnight. Rain showers likely after midnight. Waves 3 to 5 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. $$ LSZ142-212200- Taconite Harbor to Silver Bay Harbor MN- 1113 AM CDT Thu May 21 2026 .REST OF TODAY...Northeast wind 5 to 10 knots. Sunny. Waves 1 foot or less. .TONIGHT...Northeast wind 5 to 10 knots. 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 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. $$ LSZ143-212200- Silver Bay Harbor to Two Harbors MN- 1113 AM CDT Thu May 21 2026 .REST OF TODAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots late. Sunny. Waves 1 to 2 feet. .TONIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots early in the morning. Mostly cloudy. Waves 1 to 2 feet. .FRIDAY...Northeast wind 15 to 20 knots with gusts to around 25 knots. Mostly sunny. Waves 1 to 2 feet building to 2 to 4 feet in the afternoon. A small craft advisory may be needed. .FRIDAY NIGHT...Northeast wind 15 to 20 knots with gusts to around 25 knots easing to 10 to 15 knots with gusts to around 20 knots after midnight. Chance of rain showers in the evening, then rain showers after midnight. Waves 3 to 5 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. $$ LSZ144-212200- Two Harbors to Duluth MN- 1113 AM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO 10 PM CDT THIS EVENING... .REST OF TODAY...Northeast wind 10 to 15 knots. Gusts up to 25 knots. 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. 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 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 3 to 5 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. $$ LSZ145-212200- Duluth MN to Port Wing WI- 1113 AM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO 10 PM CDT THIS EVENING... .REST OF TODAY...Northeast wind 10 to 15 knots. Gusts up to 25 knots late. Sunny. Waves 1 to 2 feet building to 1 to 3 feet late. .TONIGHT...Northeast wind 15 to 20 knots with gusts to around 25 knots easing to 5 to 10 knots after midnight. Mostly cloudy. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late evening and overnight. .FRIDAY...Northeast wind 15 to 20 knots with gusts to around 25 knots. Mostly sunny. Waves 1 to 2 feet building to 3 to 5 feet in the afternoon. Waves occasionally to 7 feet. A small craft advisory may be needed. .FRIDAY NIGHT...Northeast wind 20 to 25 knots with gusts to around 30 knots easing to 10 to 15 knots with gusts to around 20 knots after midnight. Chance of rain showers in the evening, then rain showers after midnight. Waves 3 to 5 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. $$ LSZ146-212200- Port Wing to Sand Island WI- 1113 AM CDT Thu May 21 2026 .REST OF TODAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots late. 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. 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 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. $$ LSZ147-212200- Sand Island to Bayfield WI- 1113 AM CDT Thu May 21 2026 .REST OF TODAY...East wind 10 to 15 knots. Sunny. Waves 1 to 2 feet. .TONIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots becoming north 5 knots early in the morning. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 2 feet. .FRIDAY...Northeast wind 15 to 20 knots. Mostly sunny. Waves 1 to 2 feet building to 2 to 4 feet late in the afternoon. A small craft advisory may be needed. .FRIDAY NIGHT...East wind 15 to 20 knots with gusts to around 25 knots easing to 5 to 10 knots with gusts to around 20 knots in the late evening and overnight. Rain showers likely after midnight. Waves 3 to 5 feet subsiding to 1 to 3 feet early in the morning. A small craft advisory may be needed. $$ LSZ150-212200- Outer Apostle Islands Beyond 5 NM from Mainland- 1113 AM CDT Thu May 21 2026 .REST OF TODAY...East wind 10 to 15 knots with gusts to around 20 knots. 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 with gusts to around 20 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. $$ LSZ121-212200- Chequamegon Bay-Bayfield to Oak Point WI- 1113 AM CDT Thu May 21 2026 .REST OF TODAY...East wind 10 to 15 knots with gusts to around 20 knots. Sunny. Waves 1 to 2 feet. .TONIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots becoming south 5 knots after midnight. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 3 feet. .FRIDAY...Northeast wind 15 to 20 knots. Mostly sunny. Waves 1 to 2 feet building to 2 to 4 feet late in the afternoon. .FRIDAY NIGHT...East wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots early in the morning. Slight chance of rain showers after midnight. Waves 2 to 4 feet subsiding to 1 to 2 feet in the late evening and overnight. A small craft advisory may be needed. $$ LSZ148-212200- Oak Point to Saxon Harbor WI- 1113 AM CDT Thu May 21 2026 .REST OF TODAY...Northeast wind 10 to 15 knots with gusts to around 20 knots. 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 5 to 10 knots rising to 15 to 20 knots in the afternoon. 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