Nearshore Marine Forecast
Issued by NWS Duluth, MN
Issued by NWS Duluth, MN
192 FZUS53 KDLH 190418 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 1118 PM CDT Mon Aug 18 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. LSZ140-141-191015- Grand Portage to Grand Marais MN- Grand Marais to Taconite Harbor MN- 1118 PM CDT Mon Aug 18 2025 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT TUESDAY... .REST OF TONIGHT...East wind 5 to 10 knots becoming northeast toward daybreak. Patchy fog late in the evening. Areas of fog toward daybreak. Slight chance of rain showers after midnight. Waves 1 to 2 feet. .TUESDAY...North wind 5 knots becoming southwest late in the afternoon. Patchy fog in the morning. Slight chance of rain showers in the morning. Waves 1 foot or less. .TUESDAY NIGHT...West wind 5 knots becoming north after midnight. Widespread dense fog after midnight. Waves 1 foot or less. .WEDNESDAY...North wind 5 knots becoming east late in the morning, then becoming south in the afternoon. Widespread dense fog in the morning. Waves 1 foot or less. $$ LSZ142-143-191015- Taconite Harbor to Silver Bay Harbor MN- Silver Bay Harbor to Two Harbors MN- 1118 PM CDT Mon Aug 18 2025 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT TUESDAY... .REST OF TONIGHT...North wind 5 knots becoming northwest toward daybreak. Patchy fog. Waves 1 foot or less. .TUESDAY...Southwest wind 5 knots becoming south late in the afternoon. Patchy fog in the morning. Slight chance of showers in the morning. Waves 1 foot or less. .TUESDAY NIGHT...Northeast wind 5 knots becoming north early in the morning. Patchy dense fog after midnight. Waves 1 foot or less. .WEDNESDAY...North wind 5 knots becoming southeast in the afternoon. Widespread dense fog in the morning. Waves 1 foot or less. $$ LSZ144-145-191015- Two Harbors to Duluth MN-Duluth MN to Port Wing WI- 1118 PM CDT Mon Aug 18 2025 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT TUESDAY... .REST OF TONIGHT...Northeast wind 5 knots becoming northwest toward daybreak. Patchy fog late in the evening, then areas of fog after midnight. Waves 1 foot or less. .TUESDAY...Southwest wind 5 knots becoming northeast late in the afternoon. Areas of fog in the morning. Slight chance of showers in the morning. Waves 1 foot or less. .TUESDAY NIGHT...Northeast wind 5 knots. Widespread fog after midnight. Waves 1 foot or less. .WEDNESDAY...Northeast wind 5 knots becoming east in the afternoon. Widespread dense fog in the morning. Waves 1 foot or less. $$ LSZ146-191015- Port Wing to Sand Island WI- 1118 PM CDT Mon Aug 18 2025 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT TUESDAY... .REST OF TONIGHT...North wind 5 knots. Patchy fog late in the evening, then areas of fog after midnight. Waves 1 foot or less. .TUESDAY...West wind 5 knots becoming north late in the afternoon. Areas of fog in the morning. Slight chance of showers in the morning. Waves 1 foot or less. .TUESDAY NIGHT...Northeast wind 5 knots becoming east after midnight, then becoming northwest early in the morning. Areas of dense fog after midnight. Waves 1 foot or less. .WEDNESDAY...Northwest wind 5 knots becoming northeast in the late morning and early afternoon, then becoming east late in the afternoon. Widespread dense fog in the morning. Waves 1 foot or less. $$ LSZ147-191015- Sand Island to Bayfield WI- 1118 PM CDT Mon Aug 18 2025 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT TUESDAY... .REST OF TONIGHT...North wind 5 knots. Patchy fog late in the evening. Areas of fog toward daybreak. Waves 1 foot or less. .TUESDAY...Northwest wind 5 knots becoming north late in the afternoon. Areas of fog in the morning. Waves 1 foot or less. .TUESDAY NIGHT...Northeast wind 5 knots becoming northwest early in the morning. Patchy fog after midnight. Waves 1 foot or less. .WEDNESDAY...North wind 5 knots becoming east late in the afternoon. Widespread dense fog in the morning. Waves 1 foot or less. $$ LSZ150-191015- Outer Apostle Islands Beyond 5 NM from Mainland- 1118 PM CDT Mon Aug 18 2025 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT TUESDAY... .REST OF TONIGHT...South wind 5 knots becoming north after midnight, then becoming northwest toward daybreak. Patchy fog late in the evening. Areas of fog toward daybreak. Waves 1 foot or less. .TUESDAY...Northwest wind 5 to 10 knots. Patchy fog in the morning. Waves 1 foot or less. .TUESDAY NIGHT...Northeast wind 5 knots becoming north early in the morning. Patchy dense fog after midnight. Waves 1 foot or less. .WEDNESDAY...North wind 5 knots becoming east in the late morning and afternoon. Widespread dense fog in the morning. Waves 1 foot or less. $$ LSZ121-191015- Chequamegon Bay-Bayfield to Oak Point WI- 1118 PM CDT Mon Aug 18 2025 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT TUESDAY... .REST OF TONIGHT...South wind 5 knots becoming northwest after midnight. Patchy fog after midnight. Areas of fog toward daybreak. Waves 1 foot or less. .TUESDAY...Northwest wind 5 knots becoming west late in the morning, then becoming northeast in the afternoon. Areas of fog in the morning. Slight chance of showers in the morning. Waves 1 foot or less. .TUESDAY NIGHT...Northeast wind 5 knots becoming northwest early in the morning. Widespread fog after midnight. Waves 1 foot or less. .WEDNESDAY...Northwest wind 5 knots becoming northeast in the late morning and afternoon. Widespread dense fog in the morning. Waves 1 foot or less. $$ LSZ148-191015- Oak Point to Saxon Harbor WI- 1118 PM CDT Mon Aug 18 2025 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT TUESDAY... .REST OF TONIGHT...Southwest wind 5 knots becoming northwest after midnight. Patchy fog after midnight. Areas of fog toward daybreak. Waves 1 foot or less. .TUESDAY...Northwest wind 5 knots becoming northeast in the afternoon. Areas of fog in the morning. Waves 1 foot or less. .TUESDAY NIGHT...Northeast wind 5 knots becoming west early in the morning. Widespread dense fog after midnight. Waves 1 foot or less. .WEDNESDAY...West wind 5 knots becoming northeast in the late morning and afternoon. Widespread dense fog in the morning. Waves 1 foot or less. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes Britt