FZUS53 KDLH 211823 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 123 PM 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. LSZ140-212200- Grand Portage to Grand Marais MN- 123 PM CDT Tue Apr 21 2026 .REST OF TODAY...Southwest wind 5 to 10 knots. Sunny. Waves 1 foot or less. .TONIGHT...Southwest wind 5 knots becoming east early in the morning. Mostly clear. Waves 1 foot or less. .WEDNESDAY...East wind 10 to 15 knots. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots. Chance of rain and slight chance of thunderstorms after midnight. Waves 1 to 3 feet building to 2 to 4 feet after midnight. $$ LSZ141-212200- Grand Marais to Taconite Harbor MN- 123 PM CDT Tue Apr 21 2026 .REST OF TODAY...Southwest wind 5 to 10 knots. Sunny. Waves 1 foot or less. .TONIGHT...Southeast wind 5 knots early in the evening becoming variable 10 knots or less, then becoming northeast 5 knots early in the morning. Mostly clear. Waves 1 foot or less. .WEDNESDAY...East wind 5 to 10 knots. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots. Slight chance of rain in the evening. Slight chance of thunderstorms through the night. Chance of rain after midnight. Waves 1 to 3 feet. $$ LSZ142-212200- Taconite Harbor to Silver Bay Harbor MN- 123 PM CDT Tue Apr 21 2026 .REST OF TODAY...South wind 5 knots. Sunny. Waves 1 foot or less. .TONIGHT...Variable winds 10 knots or less becoming northeast 5 knots after midnight. 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. Chance of rain and slight chance of thunderstorms through the night. Waves 1 to 3 feet. $$ LSZ143-212200- Silver Bay Harbor to Two Harbors MN- 123 PM CDT Tue Apr 21 2026 .REST OF TODAY...Southeast wind 5 knots. Sunny. Waves 1 foot or less. .TONIGHT...Variable winds 10 knots or less becoming northeast 5 knots in the late evening and overnight. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Northeast wind 10 to 15 knots. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots until early morning. Chance of rain in the evening. Slight chance of thunderstorms through the night. Slight chance of rain after midnight. Waves 1 to 3 feet. $$ LSZ144-212200- Two Harbors to Duluth MN- 123 PM CDT Tue Apr 21 2026 .REST OF TODAY...East wind 5 knots. Sunny. Waves 1 foot or less. .TONIGHT...Northeast 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 until early morning. Slight chance of rain and thunderstorms. Waves 1 to 2 feet. $$ LSZ145-212200- Duluth MN to Port Wing WI- 123 PM CDT Tue Apr 21 2026 .REST OF TODAY...Northeast wind 5 to 10 knots. Sunny. Waves 1 foot or less. .TONIGHT...Northeast wind 5 knots. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Northeast wind 10 to 15 knots. Sunny. Waves 1 to 2 feet. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots until early morning. Slight chance of rain and thunderstorms. Waves 1 to 3 feet. $$ LSZ146-212200- Port Wing to Sand Island WI- 123 PM CDT Tue Apr 21 2026 .REST OF TODAY...East wind 5 knots. Sunny. Waves 1 foot or less. .TONIGHT...East wind 5 knots early in the evening becoming variable 10 knots or less, then becoming east 5 knots after midnight. 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 through the night. Waves 1 to 2 feet. $$ LSZ147-212200- Sand Island to Bayfield WI- 123 PM CDT Tue Apr 21 2026 .REST OF TODAY...Northeast wind 5 knots becoming southeast late. Sunny. Waves 1 foot or less. .TONIGHT...Southeast wind 5 knots early in the evening becoming variable 10 knots or less, then becoming southeast 5 knots early in the morning. Clear. Waves 1 foot or less. .WEDNESDAY...Southeast wind 5 knots becoming east in the afternoon. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...East wind 5 to 10 knots. Slight chance of rain and thunderstorms through the night. Waves 1 to 2 feet. $$ LSZ150-212200- Outer Apostle Islands Beyond 5 NM from Mainland- 123 PM CDT Tue Apr 21 2026 .REST OF TODAY...West wind 5 knots becoming southeast late. Sunny. Waves 1 foot or less. .TONIGHT...Southeast wind 5 knots becoming east after midnight. 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 evening. Slight chance of rain and thunderstorms through the night. Waves 1 to 3 feet. $$ LSZ121-212200- Chequamegon Bay-Bayfield to Oak Point WI- 123 PM CDT Tue Apr 21 2026 .REST OF TODAY...Northeast wind 5 to 10 knots. Sunny. Waves 1 foot or less. .TONIGHT...East wind 5 knots early in the evening becoming variable 10 knots or less, then becoming southeast 5 knots early in the morning. Clear. Waves 1 foot or less. .WEDNESDAY...Southeast wind 5 knots becoming east in the afternoon. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...East wind 5 knots becoming southeast after midnight. Slight chance of rain and thunderstorms through the night. Waves 1 foot or less. $$ LSZ148-212200- Oak Point to Saxon Harbor WI- 123 PM CDT Tue Apr 21 2026 .REST OF TODAY...East wind 5 knots. Sunny. Waves 1 foot or less. .TONIGHT...Southeast wind 5 knots. Clear. Waves 1 foot or less. .WEDNESDAY...Southeast wind 5 knots becoming east in the late morning and afternoon. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...East wind 5 to 10 knots becoming southeast after midnight. Slight chance of rain and thunderstorms through the night. Waves 1 to 2 feet. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH