FZUS53 KDLH 211708 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 1208 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- 1208 PM CDT Tue Apr 21 2026 .REST OF TODAY...South wind 5 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 after midnight. Waves 1 to 3 feet building to 2 to 4 feet after midnight. $$ LSZ141-212200- Grand Marais to Taconite Harbor MN- 1208 PM CDT Tue Apr 21 2026 .REST OF TODAY...Southwest wind 5 knots. Sunny. Waves 1 foot or less. .TONIGHT...Southeast wind 5 knots early in the evening becoming variable 10 knots or less, then becoming northeast 5 knots early in the morning. Mostly clear. Waves 1 foot or less. .WEDNESDAY...East wind 5 to 10 knots. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots. Slight chance of rain showers in the evening. Slight chance of thunderstorms through the night. Chance of rain after midnight. Waves 1 to 3 feet. $$ LSZ142-212200- Taconite Harbor to Silver Bay Harbor MN- 1208 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 showers and slight chance of thunderstorms through the night. Waves 1 to 3 feet. $$ LSZ143-212200- Silver Bay Harbor to Two Harbors MN- 1208 PM CDT Tue Apr 21 2026 .REST OF TODAY...South wind 5 knots. Sunny. Waves 1 foot or less. .TONIGHT...Variable winds 10 knots or less becoming northeast 5 knots in the late evening and overnight. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Northeast wind 10 to 15 knots. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the evening. Chance of rain showers and slight chance of thunderstorms. Waves 1 to 3 feet. $$ LSZ144-212200- Two Harbors to Duluth MN- 1208 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 in the evening then 20 knots early in the morning. Slight chance of showers and thunderstorms. Waves 1 to 2 feet. $$ LSZ145-212200- Duluth MN to Port Wing WI- 1208 PM CDT Tue Apr 21 2026 .REST OF TODAY...Northeast wind 5 knots. Sunny. Waves 1 foot or less. .TONIGHT...Northeast wind 5 knots. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Northeast wind 10 to 15 knots. Sunny. Waves 1 to 2 feet. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the evening then 20 knots early in the morning. Slight chance of showers and thunderstorms. Waves 1 to 3 feet. $$ LSZ146-212200- Port Wing to Sand Island WI- 1208 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 showers and thunderstorms. Waves 1 to 2 feet. $$ LSZ147-212200- Sand Island to Bayfield WI- 1208 PM CDT Tue Apr 21 2026 .REST OF TODAY...East wind 5 knots becoming southeast late. Sunny. Waves 1 foot or less. .TONIGHT...Southeast wind 5 knots early in the evening becoming variable 10 knots or less, then becoming southeast 5 knots early in the morning. Clear. Waves 1 foot or less. .WEDNESDAY...Southeast wind 5 knots becoming east in the afternoon. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...East wind 10 to 15 knots. Slight chance of showers and thunderstorms. Waves 1 to 2 feet. $$ LSZ150-212200- Outer Apostle Islands Beyond 5 NM from Mainland- 1208 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 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 then 20 knots early in the morning. Slight chance of showers and thunderstorms through the night. Waves 1 to 3 feet. $$ LSZ121-212200- Chequamegon Bay-Bayfield to Oak Point WI- 1208 PM CDT Tue Apr 21 2026 .REST OF TODAY...East wind 5 knots. Sunny. Waves 1 foot or less. .TONIGHT...East wind 5 knots early in the evening becoming variable 10 knots or less, then becoming southeast 5 knots early in the morning. Clear. Waves 1 foot or less. .WEDNESDAY...Southeast wind 5 knots becoming east in the afternoon. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...East wind 5 knots becoming southeast after midnight. Slight chance of showers and thunderstorms. Waves 1 foot or less. $$ LSZ148-212200- Oak Point to Saxon Harbor WI- 1208 PM CDT Tue Apr 21 2026 .REST OF TODAY...Northeast wind 5 knots becoming east late. 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 with gusts to around 20 knots after midnight. Slight chance of showers and thunderstorms. Waves 1 to 2 feet. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH