FZUS53 KDLH 182032 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 332 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. LSZ140-190400- Grand Portage to Grand Marais MN- 332 PM CDT Wed Mar 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 PM CDT THIS AFTERNOON... .TONIGHT...West wind 10 to 15 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 northwest late in the morning, then becoming southwest in the afternoon. Chance of snow and light freezing drizzle in the afternoon. Waves 1 foot or less. .THURSDAY NIGHT...South wind 5 to 10 knots becoming southeast late in the evening, then becoming southwest after midnight. Chance of snow in the evening. Chance of drizzle and light freezing drizzle through the night. 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. Chance of light freezing drizzle and slight chance of drizzle in the morning. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ141-190400- Grand Marais to Taconite Harbor MN- 332 PM CDT Wed Mar 18 2026 .TONIGHT...West wind 5 to 10 knots becoming northwest after midnight. Slight chance of light freezing drizzle in the late evening and early morning. Waves 1 to 2 feet. .THURSDAY...North wind 5 knots becoming southwest in the late morning and afternoon. Slight chance of drizzle and light freezing drizzle in the afternoon. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest after midnight. Chance of snow in the evening. Chance of drizzle and light freezing drizzle through the night. Waves 1 foot or less. .FRIDAY...Northwest wind 5 knots. Slight chance of light freezing drizzle in the morning. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ142-190400- Taconite Harbor to Silver Bay Harbor MN- 332 PM CDT Wed Mar 18 2026 .TONIGHT...Southwest wind 5 knots becoming northwest after midnight. Slight chance of drizzle and light freezing drizzle in the late evening and early morning. 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 drizzle and light freezing drizzle in the afternoon. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest after midnight. Slight chance of drizzle and light freezing drizzle 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. $$ LSZ143-190400- Silver Bay Harbor to Two Harbors MN- 332 PM CDT Wed Mar 18 2026 .TONIGHT...Southwest wind 5 knots becoming north late in the night. Slight chance of drizzle until early morning. Slight chance of light freezing drizzle in the late evening and early morning. Waves 1 to 2 feet. .THURSDAY...North wind 5 knots becoming northeast late in the morning, then becoming south in the afternoon. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest early in the morning. Slight chance of drizzle and light freezing drizzle in the evening. Waves 1 foot or less. .FRIDAY...West wind 5 knots. Partly sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ144-190400- Two Harbors to Duluth MN- 332 PM CDT Wed Mar 18 2026 .TONIGHT...Southwest wind 5 to 10 knots becoming northwest late in the night. Slight chance of drizzle until early morning. Slight chance of snow late in the evening. Waves 1 foot or less. .THURSDAY...North wind 5 knots becoming northeast late in the morning, then 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. Mostly cloudy. 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. $$ LSZ145-190400- Duluth MN to Port Wing WI- 332 PM CDT Wed Mar 18 2026 .TONIGHT...Southwest wind 5 to 10 knots becoming northwest late in the night. Slight chance of drizzle until early morning. Slight chance of light freezing drizzle after midnight. Waves 1 foot or less. .THURSDAY...Northeast wind 5 knots becoming southeast late in the afternoon. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...South wind 5 to 10 knots becoming southwest 10 to 15 knots in the late evening and overnight. Mostly cloudy. Waves 1 foot or less. .FRIDAY...West wind 5 to 10 knots. Mostly cloudy. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ146-190400- Port Wing to Sand Island WI- 332 PM CDT Wed Mar 18 2026 .TONIGHT...Southwest wind 5 to 10 knots becoming northwest late in the night. Slight chance of drizzle until early morning. Waves 1 to 2 feet. .THURSDAY...North wind 5 knots becoming east late in the morning, then becoming southwest in the afternoon. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest after midnight. Slight chance of drizzle in the evening. 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. $$ LSZ147-190400- Sand Island to Bayfield WI- 332 PM CDT Wed Mar 18 2026 .TONIGHT...Southwest wind 5 knots becoming northwest late in the night. Slight chance of drizzle until early morning. Slight chance of light freezing drizzle after midnight. Waves 1 to 2 feet. .THURSDAY...North wind 5 knots becoming southeast in the afternoon. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...South wind 5 knots becoming southwest after midnight. Slight chance of light freezing drizzle in the evening. Slight chance of drizzle through the night. Waves 1 foot or less. .FRIDAY...West wind 5 knots. Partly sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ150-190400- Outer Apostle Islands Beyond 5 NM from Mainland- 332 PM CDT Wed Mar 18 2026 .TONIGHT...Southwest wind 5 to 10 knots becoming north late in the night. Slight chance of drizzle in the late evening and early morning. Waves 1 to 2 feet. .THURSDAY...Northeast wind 5 knots becoming southeast in the afternoon. Slight chance of light freezing drizzle in the afternoon. Waves 1 foot or less. .THURSDAY NIGHT...South wind 5 to 10 knots becoming southwest after midnight. Slight chance of light freezing drizzle in the evening. Slight chance of drizzle 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. $$ LSZ148-190400- Oak Point to Saxon Harbor WI- 332 PM CDT Wed Mar 18 2026 .TONIGHT...Southwest wind 5 to 10 knots becoming northwest late in the night. Slight chance of drizzle until early morning. Waves 1 foot or less. .THURSDAY...North wind 5 knots becoming southeast late in the afternoon. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest 10 to 15 knots in the late evening and early morning, then easing to 5 to 10 knots early in the morning. Mostly cloudy. Waves 1 foot or less. .FRIDAY...West wind 5 to 10 knots becoming northwest in the afternoon. Partly sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH