FZUS53 KDLH 182313 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 613 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- 613 PM CDT Wed Mar 18 2026 .REST OF TONIGHT...West wind 10 to 15 knots with gusts to around 20 knots becoming northwest 5 to 10 knots after midnight. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 2 feet. .THURSDAY...North wind 5 to 10 knots becoming south in the afternoon. Chance of snow in the afternoon. Waves 1 foot or less. .THURSDAY NIGHT...South wind 5 to 10 knots becoming southwest 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 to 10 knots becoming north early in the afternoon, then becoming west late in the afternoon. Patchy fog in the morning. . Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ141-191000- Grand Marais to Taconite Harbor MN- 613 PM CDT Wed Mar 18 2026 .REST OF TONIGHT...Southwest wind 10 to 15 knots becoming west 5 knots late in the evening, then becoming northwest after midnight. Slight chance of light freezing drizzle late in the evening. Waves 1 to 2 feet. .THURSDAY...North wind 5 knots becoming east late in the morning, then becoming south in the afternoon. Slight chance of snow in the afternoon. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest after midnight. Chance of snow and light freezing rain in the evening. Chance of rain through the night. Slight chance of light freezing rain and snow after midnight. Patchy fog after midnight. Waves 1 foot or less. .FRIDAY...Northwest wind 5 knots. Patchy fog in the morning. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ142-191000- Taconite Harbor to Silver Bay Harbor MN- 613 PM CDT Wed Mar 18 2026 .REST OF TONIGHT...Southwest wind 5 to 10 knots becoming northwest after midnight. Slight chance of drizzle and light freezing drizzle in the late evening and early morning. Waves 1 foot or less. .THURSDAY...North wind 5 knots becoming south in the afternoon. Slight chance of rain in the afternoon. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots 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...West wind 5 knots. Patchy fog in the morning. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ143-191000- Silver Bay Harbor to Two Harbors MN- 613 PM CDT Wed Mar 18 2026 .REST OF TONIGHT...Southwest wind 5 to 10 knots becoming north toward daybreak. Slight chance of drizzle and light freezing drizzle until early morning. Slight chance of snow after midnight. Waves 1 foot or less. .THURSDAY...North wind 5 knots becoming southeast in the afternoon. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest in the late evening and overnight. Slight chance of rain and light freezing rain in the evening. Patchy fog through the night. Waves 1 foot or less. .FRIDAY...West wind 5 knots. Partly sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ144-191000- Two Harbors to Duluth MN- 613 PM CDT Wed Mar 18 2026 .REST OF TONIGHT...Southwest wind 5 to 10 knots becoming north toward daybreak. Slight chance of light freezing drizzle early in the evening. Slight chance of drizzle until early morning. Slight chance of rain late in the evening. Waves 1 foot or less. .THURSDAY...Northeast wind 5 knots becoming southeast in the afternoon. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 to 10 knots becoming southwest 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. $$ LSZ145-191000- Duluth MN to Port Wing WI- 613 PM CDT Wed Mar 18 2026 .REST OF TONIGHT...Southwest wind 5 to 10 knots becoming north toward daybreak. Slight chance of light freezing drizzle early in the evening. Slight chance of rain and drizzle until early morning. Slight chance of light freezing drizzle after midnight. Waves 1 foot or less. .THURSDAY...Northeast wind 5 knots becoming east late in the afternoon. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 to 10 knots becoming southwest early in the morning. Patchy fog through the night. Waves 1 foot or less. .FRIDAY...West wind 5 to 10 knots. Mostly cloudy. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ146-191000- Port Wing to Sand Island WI- 613 PM CDT Wed Mar 18 2026 .REST OF TONIGHT...Southwest wind 5 knots becoming north toward daybreak. Slight chance of light freezing drizzle and snow early in the evening. Slight chance of drizzle until early morning. Waves 1 foot or less. .THURSDAY...Northeast wind 5 knots becoming east in the 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 southwest 5 to 10 knots early in the morning. 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. $$ LSZ147-191000- Sand Island to Bayfield WI- 613 PM CDT Wed Mar 18 2026 .REST OF TONIGHT...Southwest wind 5 knots becoming north toward daybreak. Slight chance of snow early in the evening. Slight chance of drizzle and light freezing drizzle until early morning. Waves 1 foot or less. .THURSDAY...Northeast wind 5 knots becoming southeast in the afternoon. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest after midnight. Patchy fog through the night. Slight chance of rain through the night. Waves 1 foot or less. .FRIDAY...West wind 5 knots. Partly sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ150-191000- Outer Apostle Islands Beyond 5 NM from Mainland- 613 PM CDT Wed Mar 18 2026 .REST OF TONIGHT...Southwest wind 5 to 10 knots becoming north toward daybreak. Slight chance of snow early in the evening. Slight chance of light freezing drizzle in the evening. Slight chance of drizzle until early morning. Waves 1 foot or less. .THURSDAY...Northeast wind 5 knots becoming southeast in the afternoon. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest 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. $$ LSZ148-191000- Oak Point to Saxon Harbor WI- 613 PM CDT Wed Mar 18 2026 .REST OF TONIGHT...Southwest wind 5 knots becoming northwest toward daybreak. Slight chance of light freezing drizzle early in the evening. Slight chance of snow in the evening. Slight chance of drizzle until early morning. Waves 1 foot or less. .THURSDAY...North wind 5 knots becoming southeast late in the afternoon. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest 10 to 15 knots in the late evening and overnight. Patchy fog through the night. Waves 1 foot or less. .FRIDAY...West wind 5 to 10 knots becoming northwest in the afternoon. Partly sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH