Nearshore Marine Forecast
Issued by NWS Duluth, MN
Issued by NWS Duluth, MN
178 FZUS53 KDLH 201405 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 905 AM CDT Wed Aug 20 2025 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. LSZ140-141-202215- Grand Portage to Grand Marais MN- Grand Marais to Taconite Harbor MN- 905 AM CDT Wed Aug 20 2025 .REST OF TODAY...East wind 5 knots becoming south in the afternoon. Patchy fog late in the morning. Areas of fog in the afternoon. Waves 1 foot or less. .TONIGHT...Southwest wind 5 to 10 knots becoming west in the late evening and overnight. Areas of dense fog. Waves 1 foot or less. .THURSDAY...West wind 5 knots becoming south in the late morning and afternoon. Areas of dense fog in the morning. Waves 1 foot or less. .THURSDAY NIGHT...South wind 5 to 10 knots becoming southwest after midnight. Chance of showers and thunderstorms after midnight. Waves 1 foot or less. $$ LSZ142-143-202215- Taconite Harbor to Silver Bay Harbor MN- Silver Bay Harbor to Two Harbors MN- 905 AM CDT Wed Aug 20 2025 .REST OF TODAY...East wind 5 knots becoming southeast in the afternoon. Patchy fog early in the afternoon. Areas of fog late. Waves 1 foot or less. .TONIGHT...East wind 5 knots becoming northeast in the late evening and overnight. Patchy fog in the evening, then areas of dense fog after midnight. Waves 1 foot or less. .THURSDAY...North wind 5 knots becoming southeast in the late morning and afternoon. Areas of dense fog in the morning. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest after midnight. Chance of showers and thunderstorms after midnight. Waves 1 foot or less. $$ LSZ144-145-202215- Two Harbors to Duluth MN-Duluth MN to Port Wing WI- 905 AM CDT Wed Aug 20 2025 ...DENSE FOG ADVISORY IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON... .REST OF TODAY...Northeast wind 5 knots. Widespread dense fog in the late morning and early afternoon. Patchy fog late. Waves 1 foot or less. .TONIGHT...East wind 5 knots. Areas of dense fog through the night. Waves 1 foot or less. .THURSDAY...East wind 5 knots. Areas of dense fog in the morning. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest early in the morning. Chance of showers and thunderstorms after midnight. Waves 1 foot or less. $$ LSZ146-202215- Port Wing to Sand Island WI- 905 AM CDT Wed Aug 20 2025 .REST OF TODAY...Northeast wind 5 knots. Patchy fog in the late morning and early afternoon. Areas of fog late. Waves 1 foot or less. .TONIGHT...East wind 5 knots becoming southeast early in the morning. Patchy fog in the evening, then areas of dense fog after midnight. Waves 1 foot or less. .THURSDAY...South wind 5 knots becoming west late in the morning, then becoming northeast in the afternoon. Areas of dense fog in the morning. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest in the late evening and overnight. Chance of showers and thunderstorms after midnight. Waves 1 foot or less. $$ LSZ147-202215- Sand Island to Bayfield WI- 905 AM CDT Wed Aug 20 2025 .REST OF TODAY...Northeast wind 5 knots becoming east late. Mostly cloudy late in the morning then clearing. Waves 1 foot or less. .TONIGHT...Southeast wind 5 knots. Patchy fog in the evening, then areas of dense fog after midnight. Waves 1 foot or less. .THURSDAY...South wind 5 knots becoming east in the afternoon. Areas of dense fog in the morning. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest in the late evening and overnight. Chance of showers and thunderstorms after midnight. Waves 1 foot or less. $$ LSZ150-202215- Outer Apostle Islands Beyond 5 NM from Mainland- 905 AM CDT Wed Aug 20 2025 .REST OF TODAY...Northeast wind 5 knots becoming southeast late. Patchy fog early in the afternoon. Areas of fog late. Waves 1 foot or less. .TONIGHT...Southeast wind 5 knots becoming east in the late evening and early morning, then becoming southeast early in the morning. Areas of dense fog through the night. Waves 1 foot or less. .THURSDAY...South wind 5 knots becoming east late in the afternoon. Areas of dense fog in the morning. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest early in the morning. Chance of showers and slight chance of thunderstorms after midnight. Waves 1 foot or less. $$ LSZ121-202215- Chequamegon Bay-Bayfield to Oak Point WI- 905 AM CDT Wed Aug 20 2025 .REST OF TODAY...Northeast wind 5 knots. Mostly cloudy in the late morning and early afternoon then clearing. Waves 1 foot or less. .TONIGHT...East wind 5 knots becoming south early in the morning. Areas of dense fog through the night. Waves 1 foot or less. .THURSDAY...Southwest wind 5 knots becoming southeast in the afternoon. Areas of dense fog in the morning. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest in the late evening and overnight. Slight chance of showers and thunderstorms after midnight. Waves 1 foot or less. $$ LSZ148-202215- Oak Point to Saxon Harbor WI- 905 AM CDT Wed Aug 20 2025 .REST OF TODAY...Northeast wind 5 knots. Patchy fog in the afternoon. Waves 1 foot or less. .TONIGHT...East wind 5 knots becoming south early in the morning. Areas of dense fog. Waves 1 foot or less. .THURSDAY...Southwest wind 5 knots becoming east in the afternoon. Areas of dense fog in the morning. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest in the late evening and overnight. Slight chance of showers and thunderstorms after midnight. Waves 1 foot or less. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes PA