FZUS53 KDLH 210743 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 243 AM CDT Tue Apr 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. LSZ140-211600- Grand Portage to Grand Marais MN- 243 AM CDT Tue Apr 21 2026 .TODAY...Northwest wind 5 knots becoming southwest in the afternoon. Sunny. Waves 1 to 2 feet. .TONIGHT...Southwest wind 5 to 10 knots becoming northwest late in the evening, then becoming northeast after midnight. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Northeast wind 5 knots becoming east in the late morning and afternoon. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots. Slight chance of rain in the evening, then chance of rain after midnight. Waves 1 to 3 feet building to 2 to 4 feet after midnight. $$ LSZ141-211600- Grand Marais to Taconite Harbor MN- 243 AM CDT Tue Apr 21 2026 .TODAY...Northwest wind 5 knots becoming southwest in the afternoon. Sunny. Waves 1 to 2 feet. .TONIGHT...Southeast wind 5 knots becoming northeast in the late evening and overnight. Mostly clear. Waves 1 foot or less. .WEDNESDAY...East wind 5 to 10 knots. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots. Slight chance of rain in the evening, then chance of rain after midnight. Waves 1 to 3 feet. $$ LSZ142-211600- Taconite Harbor to Silver Bay Harbor MN- 243 AM CDT Tue Apr 21 2026 .TODAY...North wind 5 knots becoming southwest in the afternoon. Sunny. Waves 1 foot or less. .TONIGHT...East wind 5 knots becoming northeast in the late evening and overnight. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Northeast wind 5 to 10 knots. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots after midnight. Slight chance of rain and thunderstorms through the night. Waves 1 to 3 feet. $$ LSZ143-211600- Silver Bay Harbor to Two Harbors MN- 243 AM CDT Tue Apr 21 2026 .TODAY...Northwest wind 5 knots becoming northeast late in the morning, then becoming south in the afternoon. Sunny. Waves 1 foot or less. .TONIGHT...East wind 5 knots becoming northeast in the late evening and overnight. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Northeast wind 10 to 15 knots. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots. Slight chance of rain and thunderstorms. Waves 1 to 3 feet. $$ LSZ144-211600- Two Harbors to Duluth MN- 243 AM CDT Tue Apr 21 2026 .TODAY...Northwest wind 5 knots becoming northeast late in the morning, then becoming southeast in the afternoon. Sunny. Waves 1 foot or less. .TONIGHT...Northeast wind 5 knots. Mostly clear. Waves 1 foot or less. .WEDNESDAY...East wind 10 to 15 knots. Sunny. Waves 1 to 2 feet. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots early in the morning. Slight chance of rain in the evening. Waves 1 to 2 feet. $$ LSZ145-211600- Duluth MN to Port Wing WI- 243 AM CDT Tue Apr 21 2026 .TODAY...Northwest wind 5 knots becoming east in the afternoon. Sunny. Waves 1 foot or less. .TONIGHT...East wind 5 knots. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Northeast wind 10 to 15 knots. Sunny. Waves 1 to 2 feet. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots early in the morning. Slight chance of rain in the evening. Waves 1 to 3 feet. $$ LSZ146-211600- Port Wing to Sand Island WI- 243 AM CDT Tue Apr 21 2026 .TODAY...West wind 5 knots becoming north late in the morning, then becoming southeast in the afternoon. Sunny. Waves 1 foot or less. .TONIGHT...East wind 5 knots. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Northeast wind 10 to 15 knots. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots. Slight chance of rain and thunderstorms. Waves 1 to 2 feet. $$ LSZ147-211600- Sand Island to Bayfield WI- 243 AM CDT Tue Apr 21 2026 .TODAY...Northwest wind 5 knots becoming southeast late in the afternoon. Sunny. Waves 1 foot or less. .TONIGHT...Southeast wind 5 knots. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Southeast wind 5 knots becoming east in the afternoon. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...East wind 10 to 15 knots. Slight chance of rain. Waves 1 to 2 feet. $$ LSZ150-211600- Outer Apostle Islands Beyond 5 NM from Mainland- 243 AM CDT Tue Apr 21 2026 .TODAY...Northwest wind 5 to 10 knots becoming south late in the afternoon. Sunny. Waves 1 foot or less. .TONIGHT...Southeast wind 5 knots. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Southeast wind 5 knots becoming northeast in the afternoon. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...East wind 10 to 15 knots. Gusts up to 20 knots early in the morning. Slight chance of rain through the night. Waves 1 to 3 feet. $$ LSZ121-211600- Chequamegon Bay-Bayfield to Oak Point WI- 243 AM CDT Tue Apr 21 2026 .TODAY...West wind 5 knots becoming east in the afternoon. Sunny. Waves 1 foot or less. .TONIGHT...East wind 5 knots becoming south in the late evening and overnight. Mostly clear. Waves 1 foot or less. .WEDNESDAY...South wind 5 knots becoming east in the afternoon. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...East wind 5 to 10 knots becoming southeast in the late evening and overnight. Slight chance of rain in the evening. Waves 1 foot or less. $$ LSZ148-211600- Oak Point to Saxon Harbor WI- 243 AM CDT Tue Apr 21 2026 .TODAY...West wind 5 knots becoming east late in the afternoon. Sunny. Waves 1 foot or less. .TONIGHT...Southeast wind 5 knots becoming south early in the morning. Mostly clear. Waves 1 foot or less. .WEDNESDAY...South wind 5 knots becoming east in the afternoon. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...East wind 5 to 10 knots becoming southeast with gusts to around 20 knots in the late evening and overnight. Slight chance of rain. Waves 1 to 2 feet. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH