FZUS53 KDLH 220021 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 721 PM CDT Fri Aug 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. LSZ140-221000- Grand Portage to Grand Marais MN- 721 PM CDT Fri Aug 21 2026 .REST OF TONIGHT...Southwest wind 5 to 10 knots becoming northwest after midnight. Chance of rain showers early in the evening, then slight chance of rain showers late in the evening. Chance of sprinkles after midnight. Waves 1 foot or less. .SATURDAY...Northwest wind 5 to 10 knots. Gusts up to 20 knots late in the morning. Mostly sunny. Waves 1 foot or less. .SATURDAY NIGHT...North wind 10 to 15 knots with gusts to around 20 knots. Mostly clear. Waves 1 foot or less. .SUNDAY...North wind 5 to 10 knots with gusts to around 20 knots becoming south with gusts to around 20 knots in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ141-221000- Grand Marais to Taconite Harbor MN- 721 PM CDT Fri Aug 21 2026 .REST OF TONIGHT...West wind 5 knots becoming northwest after midnight. Chance of rain showers early in the evening, then slight chance of showers and thunderstorms late in the evening. Chance of sprinkles after midnight. Waves 1 foot or less. .SATURDAY...Northwest wind 5 to 10 knots with gusts to around 20 knots. Mostly sunny. Waves 1 foot or less. .SATURDAY NIGHT...North wind 5 to 10 knots. Mostly clear. Waves 1 foot or less. .SUNDAY...North wind 5 knots becoming south in the afternoon. Mostly sunny. Waves 1 foot or less. $$ LSZ142-221000- Taconite Harbor to Silver Bay Harbor MN- 721 PM CDT Fri Aug 21 2026 .REST OF TONIGHT...Southwest wind 5 knots becoming northwest in the late evening and overnight. Slight chance of rain showers in the evening. Slight chance of thunderstorms late in the evening, then chance of sprinkles after midnight. Waves 1 foot or less. .SATURDAY...Northwest wind 5 to 10 knots with gusts to around 20 knots. Sunny. Waves 1 foot or less. .SATURDAY NIGHT...North wind 5 knots. Partly cloudy. Waves 1 foot or less. .SUNDAY...North wind 5 knots early in the morning becoming variable 10 knots or less, then becoming southeast 5 knots in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ143-221000- Silver Bay Harbor to Two Harbors MN- 721 PM CDT Fri Aug 21 2026 .REST OF TONIGHT...Southwest wind 5 knots becoming northwest in the late evening and overnight. Slight chance of rain showers in the evening. Slight chance of thunderstorms late in the evening, then chance of sprinkles after midnight. Waves 1 foot or less. .SATURDAY...Northwest wind 5 to 10 knots. Sunny. Waves 1 foot or less. .SATURDAY NIGHT...North wind 5 knots. Partly cloudy. Waves 1 foot or less. .SUNDAY...North wind 5 knots early in the morning becoming northeast, then becoming southeast early in the afternoon becoming variable 10 knots or less. Sunny. Waves 1 foot or less. $$ LSZ144-221000- Two Harbors to Duluth MN- 721 PM CDT Fri Aug 21 2026 .REST OF TONIGHT...West wind 5 knots becoming northwest after midnight. Slight chance of rain showers in the evening. Slight chance of thunderstorms late in the evening, then chance of sprinkles after midnight. Waves 1 foot or less. .SATURDAY...Northwest wind 5 to 10 knots with gusts to around 20 knots. Sunny. Waves 1 foot or less. .SATURDAY NIGHT...North wind 5 to 10 knots. Mostly clear. Waves 1 foot or less. .SUNDAY...North wind 5 knots becoming east in the late morning and afternoon. Sunny. Waves 1 foot or less. $$ LSZ145-221000- Duluth MN to Port Wing WI- 721 PM CDT Fri Aug 21 2026 .REST OF TONIGHT...West wind 5 knots becoming northwestafter midnight. Slight chance of rain showers in the evening. Slight chance of thunderstorms late in the evening, then chance of sprinkles after midnight. Waves 1 foot or less. .SATURDAY...Northwest wind 5 to 10 knots. Gusts up to 20 knots in the late morning and afternoon. Sunny. Waves 1 foot or less. .SATURDAY NIGHT...North wind 5 to 10 knots. Mostly clear. Waves 1 foot or less. .SUNDAY...North wind 5 knots becoming northeast in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ146-221000- Port Wing to Sand Island WI- 721 PM CDT Fri Aug 21 2026 .REST OF TONIGHT...Southwest wind 5 knots becoming west in the late evening and overnight. Chance of showers in the evening. Slight chance of thunderstorms late in the evening, then chance of sprinkles after midnight. Waves 1 foot or less. .SATURDAY...Northwest wind 5 to 10 knots. Sunny. Waves 1 foot or less. .SATURDAY NIGHT...North wind 5 knots. Mostly clear. Waves 1 foot or less. .SUNDAY...Northeast wind 5 knots until late afternoon becoming variable 10 knots or less. Sunny. Waves 1 foot or less. $$ LSZ147-221000- Sand Island to Bayfield WI- 721 PM CDT Fri Aug 21 2026 .REST OF TONIGHT...Southwest wind 5 knots becoming northwest after midnight. Chance of sprinkles through the night. Slight chance of thunderstorms in the late evening and early morning. Waves 1 foot or less. .SATURDAY...Northwest wind 5 to 10 knots. Gusts up to 20 knots in the late morning and early afternoon. Sunny. Waves 1 foot or less. .SATURDAY NIGHT...North wind 5 to 10 knots. Mostly clear. Waves 1 foot or less. .SUNDAY...Northeast wind 5 to 10 knots becoming southeast late in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ150-221000- Outer Apostle Islands Beyond 5 NM from Mainland- 721 PM CDT Fri Aug 21 2026 .REST OF TONIGHT...Southwest wind 5 knots becoming northwest after midnight. Chance of sprinkles in the evening. Slight chance of thunderstorms through the night. Chance of showers after midnight. Waves 1 foot or less. .SATURDAY...Northwest wind 10 knots rising to 10 to 15 knots in the late morning and afternoon. Gusts up to 20 knots. Sunny. Waves 1 to 2 feet. .SATURDAY NIGHT...North wind 5 to 10 knots. Mostly clear. Waves 1 foot or less. .SUNDAY...Northeast wind 5 to 10 knots becoming southeast late in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ121-221000- Chequamegon Bay-Bayfield to Oak Point WI- 721 PM CDT Fri Aug 21 2026 .REST OF TONIGHT...Northwest wind 5 knots becoming southwest late in the evening, then becoming west after midnight. Chance of sprinkles and slight chance of thunderstorms. Waves 1 foot or less. .SATURDAY...Northwest wind 5 to 10 knots. Gusts up to 20 knots in the afternoon. Sunny. Waves 1 foot or less. .SATURDAY NIGHT...North wind 5 to 10 knots. Partly cloudy. Waves 1 foot or less. .SUNDAY...North wind 5 knots becoming northeast in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ148-221000- Oak Point to Saxon Harbor WI- 721 PM CDT Fri Aug 21 2026 .REST OF TONIGHT...Southwest wind 5 knots becoming west after midnight. Chance of sprinkles in the evening. Slight chance of thunderstorms through the night. Chance of rain showers after midnight. Waves 1 foot or less. .SATURDAY...Northwest wind 5 to 10 knots. Gusts up to 20 knots in the late morning and afternoon. Sunny. Waves 1 foot or less. .SATURDAY NIGHT...North wind 5 to 10 knots. Partly cloudy. Waves 1 foot or less. .SUNDAY...North wind 5 to 10 knots becoming northeast in the afternoon. Sunny. Waves 1 foot or less. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH