FZUS53 KDLH 190448 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 1147 PM CDT Wed Mar 18 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. LSZ140-191000- Grand Portage to Grand Marais MN- 1147 PM CDT Wed Mar 18 2026 .REST OF TONIGHT...South wind 5 knots becoming northwest after midnight. Mostly cloudy late in the evening then becoming partly cloudy. Waves 1 foot or less. .THURSDAY...North wind 5 to 10 knots becoming southeast in the afternoon. Chance of snow in the afternoon. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 to 10 knots becoming west after midnight. Patchy fog through the night. Chance of snow and light freezing rain in the evening. Chance of rain through the night. Slight chance of light freezing rain and snow after midnight. Waves 1 foot or less. .FRIDAY...Northwest wind 5 knots becoming southwest in the afternoon. Patchy fog in the morning. . Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ141-191000- Grand Marais to Taconite Harbor MN- 1147 PM CDT Wed Mar 18 2026 .REST OF TONIGHT...Southwest wind 5 knots becoming northwest after midnight. Slight chance of light freezing drizzle and snow late in the evening. Waves 1 foot or less. .THURSDAY...North wind 5 knots becoming southeast in the afternoon. Slight chance of snow in the afternoon. Waves 1 foot or less. .THURSDAY NIGHT...East wind 5 to 10 knots becoming northeast late in the evening, then becoming southwest after midnight. Chance of snow and light freezing rain in the evening. Chance of rain through the night. Slight chance of light freezing rain and snow after midnight. Patchy fog after midnight. Waves 1 foot or less. .FRIDAY...Southwest wind 5 to 10 knots. Patchy fog in the morning. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ142-191000- Taconite Harbor to Silver Bay Harbor MN- 1147 PM CDT Wed Mar 18 2026 .REST OF TONIGHT...Southwest wind 5 knots becoming north after midnight. Slight chance of rain and drizzle late in the evening. Slight chance of light freezing drizzle and snow late in the evening. Waves 1 foot or less. .THURSDAY...North wind 5 knots becoming east in the afternoon. Slight chance of rain in the afternoon. Waves 1 foot or less. .THURSDAY NIGHT...East wind 5 knots becoming west late in the evening, then becoming southwest after midnight. Patchy fog through the night. Slight chance of light freezing rain in the evening. Slight chance of rain through the night. Waves 1 foot or less. .FRIDAY...Southwest wind 5 to 10 knots. Patchy fog in the morning. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ143-191000- Silver Bay Harbor to Two Harbors MN- 1147 PM CDT Wed Mar 18 2026 .REST OF TONIGHT...North wind 5 to 10 knots. Slight chance of rain and light freezing drizzle late in the evening. Slight chance of snow after midnight. Waves 1 foot or less. .THURSDAY...Northeast wind 5 to 10 knots becoming east in the late morning and afternoon. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Northeast wind 5 to 10 knots becoming northwest late in the evening, then becoming southwest after midnight. Slight chance of rain and light freezing rain in the evening. Patchy fog through the night. Waves 1 foot or less. .FRIDAY...Southwest wind 5 to 10 knots. Partly sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ144-191000- Two Harbors to Duluth MN- 1147 PM CDT Wed Mar 18 2026 .REST OF TONIGHT...Northeast wind 5 knots becoming northwest after midnight, then becoming north toward daybreak. Slight chance of rain, drizzle and snow late in the evening. Waves 1 foot or less. .THURSDAY...Northeast wind 5 to 10 knots. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...East wind 5 to 10 knots becoming southwest in the late evening and early morning, then becoming southwest 5 to 10 knots early in the morning. Patchy fog through the night. Waves 1 foot or less. .FRIDAY...West wind 5 to 10 knots. Mostly cloudy. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ145-191000- Duluth MN to Port Wing WI- 1147 PM CDT Wed Mar 18 2026 .REST OF TONIGHT...East wind 5 knots becoming west after midnight, then becoming north toward daybreak. Slight chance of snow late in the evening. Slight chance of rain and drizzle late in the evening. Slight chance of light freezing drizzle after midnight. Waves 1 foot or less. .THURSDAY...Northeast wind 5 to 10 knots. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...East wind 5 to 10 knots becoming southwest in the late evening and overnight. Patchy fog through the night. Waves 1 foot or less. .FRIDAY...West wind 5 to 10 knots. Mostly cloudy. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ146-191000- Port Wing to Sand Island WI- 1147 PM CDT Wed Mar 18 2026 .REST OF TONIGHT...Southeast wind 5 knots becoming west after midnight, then becoming northeast toward daybreak. Slight chance of rain late in the evening. Waves 1 foot or less. .THURSDAY...East wind 5 to 10 knots. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest 10 to 15 knots in the late evening and overnight. Slight chance of rain in the evening. Patchy fog through the night. Waves 1 foot or less. .FRIDAY...West wind 5 to 10 knots. Mostly cloudy. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ147-191000- Sand Island to Bayfield WI- 1147 PM CDT Wed Mar 18 2026 .REST OF TONIGHT...Southeast wind 5 knots becoming west after midnight, then becoming north toward daybreak. Slight chance of rain and light freezing drizzle late in the evening. Waves 1 foot or less. .THURSDAY...Northeast wind 5 to 10 knots becoming east in the late morning and afternoon. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest in the late evening and early morning, then becoming west 10 to 15 knots early in the morning. Patchy fog through the night. Slight chance of rain through the night. Waves 1 foot or less. .FRIDAY...West wind 5 to 10 knots. Partly sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ150-191000- Outer Apostle Islands Beyond 5 NM from Mainland- 1147 PM CDT Wed Mar 18 2026 .REST OF TONIGHT...South wind 5 knots becoming northwest after midnight, then becoming north toward daybreak. Slight chance of rain late in the evening. Waves 1 foot or less. .THURSDAY...East wind 5 to 10 knots. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 to 10 knots becoming southwest in the late evening and early morning, then becoming west 10 to 15 knots early in the morning. Patchy fog through the night. Slight chance of light freezing rain in the evening. Slight chance of rain through the night. Waves 1 foot or less. .FRIDAY...West wind 5 to 10 knots. Partly sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ148-191000- Oak Point to Saxon Harbor WI- 1147 PM CDT Wed Mar 18 2026 .REST OF TONIGHT...Northwest wind 5 knots becoming west after midnight, then becoming north toward daybreak. Slight chance of drizzle and snow late in the evening. Slight chance of rain late in the evening. Waves 1 foot or less. .THURSDAY...East wind 5 to 10 knots. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...South wind 5 knots becoming southwest with gusts to around 20 knots in the late evening and overnight. Patchy fog through the night. Waves 1 foot or less. .FRIDAY...West wind 5 to 10 knots. Partly sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH