FZUS53 KDLH 181821 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 120 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. LSZ140-182200- Grand Portage to Grand Marais MN- 120 PM CDT Wed Mar 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 PM CDT THIS AFTERNOON... .REST OF TODAY...Southwest wind 10 to 15 knots with gusts to around 20 knots. Slight chance of light freezing drizzle through the day. Slight chance of drizzle late. Waves 2 to 4 feet. .TONIGHT...West wind 10 to 15 knots becoming northwest 5 to 10 knots after midnight. Slight chance of very light freezing drizzle in the evening. Waves 1 to 3 feet. .THURSDAY...North wind 5 to 10 knots becoming northwest late in the morning, then becoming southwest in the afternoon. Mostly sunny. 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 rain and light freezing rain through the night. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ141-182200- Grand Marais to Taconite Harbor MN- 120 PM CDT Wed Mar 18 2026 .REST OF TODAY...Southwest wind 10 to 15 knots. Slight chance of drizzle and light freezing drizzle through the day. Waves 1 to 3 feet. .TONIGHT...West wind 5 to 10 knots becoming northwest after midnight. Slight chance of very light freezing drizzle in the evening. Waves 1 to 2 feet. .THURSDAY...North wind 5 knots becoming southwest in the late morning and afternoon. Mostly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest after midnight. Chance of light freezing rain in the evening. Chance of rain through the night. Slight chance of light freezing rain after midnight. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ142-182200- Taconite Harbor to Silver Bay Harbor MN- 120 PM CDT Wed Mar 18 2026 .REST OF TODAY...Southwest wind 5 to 10 knots. Slight chance of drizzle and very light freezing drizzle through the day. Waves 1 to 2 feet. .TONIGHT...Southwest wind 5 knots becoming northwest after midnight. Slight chance of drizzle and light freezing drizzle 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. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest after midnight. Slight chance of rain through the night. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ143-182200- Silver Bay Harbor to Two Harbors MN- 120 PM CDT Wed Mar 18 2026 .REST OF TODAY...Southwest wind 5 to 10 knots. Slight chance of drizzle and very light freezing drizzle through the day. Waves 1 to 2 feet. .TONIGHT...Southwest wind 5 knots becoming north early in the morning. Slight chance of drizzle and light freezing drizzle through the night. Waves 1 to 2 feet. .THURSDAY...North wind 5 knots becoming northeast late in the morning, then becoming south in the afternoon. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest early in the morning. Slight chance of rain in the evening. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ144-182200- Two Harbors to Duluth MN- 120 PM CDT Wed Mar 18 2026 .REST OF TODAY...Southwest wind 5 to 10 knots. Slight chance of very light freezing drizzle early in the afternoon. Slight chance of drizzle through the day. Waves 1 to 2 feet. .TONIGHT...Southwest wind 5 to 10 knots becoming northwest early in the morning. Slight chance of rain and drizzle 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. Note...Wave height forecasts are for ice free areas. $$ LSZ145-182200- Duluth MN to Port Wing WI- 120 PM CDT Wed Mar 18 2026 .REST OF TODAY...Southwest wind 5 to 10 knots. Slight chance of very light freezing drizzle early in the afternoon. Slight chance of drizzle through the day. Waves 1 to 2 feet. .TONIGHT...Southwest wind 5 to 10 knots becoming northwest early in the morning. Chance of drizzle and slight chance of rain in the evening. Waves 1 foot or less. .THURSDAY...Northeast wind 5 knots becoming southeast late in the afternoon. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...South wind 5 to 10 knots becoming southwest 10 to 15 knots in the late evening and overnight. Mostly cloudy. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ146-182200- Port Wing to Sand Island WI- 120 PM CDT Wed Mar 18 2026 .REST OF TODAY...Southwest wind 5 to 10 knots. Slight chance of drizzle and very light freezing drizzle. Waves 1 to 3 feet. .TONIGHT...Southwest wind 5 to 10 knots becoming northwest early in the morning. Slight chance of rain and drizzle in the evening. 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 rain in the evening. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ147-182200- Sand Island to Bayfield WI- 120 PM CDT Wed Mar 18 2026 .REST OF TODAY...Southwest wind 5 to 10 knots. Slight chance of drizzle and very light freezing drizzle early in the afternoon. Waves 1 to 3 feet. .TONIGHT...Southwest wind 5 knots becoming northwest early in the morning. Slight chance of rain in the evening. Waves 1 to 2 feet. .THURSDAY...North wind 5 knots becoming southeast in the afternoon. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...South wind 5 knots becoming southwest after midnight. Slight chance of rain. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ150-182200- Outer Apostle Islands Beyond 5 NM from Mainland- 120 PM CDT Wed Mar 18 2026 .REST OF TODAY...Southwest wind 5 to 10 knots. Slight chance of drizzle early in the afternoon. Slight chance of very light freezing drizzle through the day. Waves 1 to 3 feet. .TONIGHT...Southwest wind 5 to 10 knots becoming north early in the morning. Slight chance of rain in the evening. Waves 1 to 2 feet. .THURSDAY...Northeast wind 5 knots becoming southeast in the afternoon. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...South wind 5 to 10 knots becoming southwest after midnight. Slight chance of rain. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ148-182200- Oak Point to Saxon Harbor WI- 120 PM CDT Wed Mar 18 2026 .REST OF TODAY...Southwest wind 5 to 10 knots. Slight chance of very light freezing drizzle early in the afternoon. Slight chance of drizzle through the day. Waves 1 foot or less. .TONIGHT...Southwest wind 5 to 10 knots becoming northwest early in the morning. Slight chance of drizzle and light freezing drizzle in the evening. Slight chance of rain through the night. Waves 1 foot or less. .THURSDAY...North wind 5 knots becoming southeast late in the afternoon. Partly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Southeast wind 5 knots becoming southwest 10 to 15 knots in the late evening and early morning, then easing to 5 to 10 knots early in the morning. Mostly cloudy. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH