FZUS53 KDLH 181600 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 1100 AM CDT Thu Jun 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- 1100 AM CDT Thu Jun 18 2026 .REST OF TODAY...West wind 5 to 10 knots. Slight chance of showers and thunderstorms in the afternoon. Waves 1 to 2 feet. .TONIGHT...Northwest wind 5 to 10 knots. Partly cloudy. Waves 1 foot or less. .FRIDAY...Northwest wind 5 to 10 knots becoming southwest 10 to 15 knots with gusts to around 20 knots in the late morning and afternoon. Sunny in the morning then becoming partly sunny. Waves 1 to 2 feet. .FRIDAY NIGHT...West wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots early in the morning. Slight chance of rain showers in the evening, then chance of rain showers after midnight. Waves 1 to 2 feet. $$ LSZ141-182200- Grand Marais to Taconite Harbor MN- 1100 AM CDT Thu Jun 18 2026 .REST OF TODAY...West wind 5 to 10 knots. Slight chance of thunderstorms early in the afternoon. Slight chance of rain showers in the afternoon. Waves 1 foot or less. .TONIGHT...Northwest wind 5 to 10 knots. Partly cloudy. Waves 1 foot or less. .FRIDAY...West wind 5 knots becoming southwest in the late morning and afternoon. Sunny in the morning then becoming partly sunny. Waves 1 foot or less. .FRIDAY NIGHT...West wind 5 knots in the evening becoming variable 10 knots or less, then becoming northwest 5 knots early in the morning. Chance of rain showers. Waves 1 foot or less. $$ LSZ142-182200- Taconite Harbor to Silver Bay Harbor MN- 1100 AM CDT Thu Jun 18 2026 .REST OF TODAY...West wind 5 knots. Mostly sunny. Waves 1 foot or less. .TONIGHT...Northwest wind 5 knots. Mostly clear. Waves 1 foot or less. .FRIDAY...West wind 5 knots becoming southwest in the late morning and afternoon. Slight chance of rain showers in the afternoon. Waves 1 foot or less. .FRIDAY NIGHT...West wind 5 knots early in the evening becoming variable 10 knots or less, then becoming northwest 5 knots early in the morning. Chance of rain showers through the night. Waves 1 foot or less. $$ LSZ143-182200- Silver Bay Harbor to Two Harbors MN- 1100 AM CDT Thu Jun 18 2026 .REST OF TODAY...West wind 5 to 10 knots. Mostly sunny. Waves 1 foot or less. .TONIGHT...Northwest wind 5 knots. Mostly clear. Waves 1 foot or less. .FRIDAY...West wind 5 knots becoming southwest in the late morning and afternoon. Chance of rain showers in the afternoon. Waves 1 foot or less. .FRIDAY NIGHT...West wind 5 knots early in the evening becoming variable 10 knots or less, then becoming west 5 knots early in the morning. Chance of rain showers through the night. Waves 1 foot or less. $$ LSZ144-182200- Two Harbors to Duluth MN- 1100 AM CDT Thu Jun 18 2026 .REST OF TODAY...West wind 5 to 10 knots. Mostly sunny. Waves 1 foot or less. .TONIGHT...Northwest wind 5 to 10 knots. Mostly clear. Waves 1 foot or less. .FRIDAY...Southwest wind 5 knots. Chance of rain showers in the afternoon. Waves 1 foot or less. .FRIDAY NIGHT...Southwest wind 5 knots becoming west in the late evening and overnight. Chance of rain showers through the night. Waves 1 foot or less. $$ LSZ145-182200- Duluth MN to Port Wing WI- 1100 AM CDT Thu Jun 18 2026 .REST OF TODAY...West wind 10 to 15 knots easing to 5 to 10 knots in the afternoon. Mostly sunny. Waves 1 foot or less. .TONIGHT...West wind 5 to 10 knots easing to 5 knots early in the morning. Mostly clear. Waves 1 foot or less. .FRIDAY...Southwest wind 5 knots. Chance of rain showers in the afternoon. Waves 1 foot or less. .FRIDAY NIGHT...Southwest wind 5 knots becoming west after midnight. Chance of rain showers through the night. Waves 1 foot or less. $$ LSZ146-182200- Port Wing to Sand Island WI- 1100 AM CDT Thu Jun 18 2026 .REST OF TODAY...West wind 5 to 10 knots. Mostly sunny. Waves 1 foot or less. .TONIGHT...West wind 5 knots. Mostly clear. Waves 1 foot or less. .FRIDAY...Southwest wind 5 knots. Slight chance of rain showers in the afternoon. Waves 1 foot or less. .FRIDAY NIGHT...Variable winds 10 knots or less becoming west 5 knots after midnight. Chance of rain showers through the night. Waves 1 foot or less. $$ LSZ147-182200- Sand Island to Bayfield WI- 1100 AM CDT Thu Jun 18 2026 .REST OF TODAY...West wind 5 to 10 knots. Mostly sunny. Waves 1 foot or less. .TONIGHT...West wind 5 knots. Mostly clear. Waves 1 foot or less. .FRIDAY...West wind 5 knots becoming southwest late in the afternoon. Sunny in the morning then becoming partly sunny. Waves 1 foot or less. .FRIDAY NIGHT...Variable winds 10 knots or less becoming west 5 knots early in the morning. Chance of rain showers through the night. Waves 1 foot or less. $$ LSZ150-182200- Outer Apostle Islands Beyond 5 NM from Mainland- 1100 AM CDT Thu Jun 18 2026 .REST OF TODAY...West wind 5 to 10 knots. Mostly sunny. Waves 1 foot or less. .TONIGHT...Northwest wind 5 to 10 knots. Gusts up to 20 knots early in the evening. Partly cloudy. Waves 1 foot or less. .FRIDAY...West wind 5 knots becoming southwest in the afternoon. Sunny in the morning then becoming partly sunny. Waves 1 foot or less. .FRIDAY NIGHT...Southwest wind 5 knots. Chance of rain showers. Waves 1 foot or less. $$ LSZ121-182200- Chequamegon Bay-Bayfield to Oak Point WI- 1100 AM CDT Thu Jun 18 2026 .REST OF TODAY...West wind 5 to 10 knots. Mostly sunny. Waves 1 foot or less. .TONIGHT...Northwest wind 5 to 10 knots. Mostly clear. Waves 1 foot or less. .FRIDAY...West wind 5 knots becoming southwest late in the afternoon. Slight chance of rain showers in the afternoon. Waves 1 foot or less. .FRIDAY NIGHT...Southwest wind 5 knots. Chance of rain showers through the night. Waves 1 foot or less. $$ LSZ148-182200- Oak Point to Saxon Harbor WI- 1100 AM CDT Thu Jun 18 2026 .REST OF TODAY...West wind 5 to 10 knots. Mostly sunny. Waves 1 foot or less. .TONIGHT...West wind 5 to 10 knots. Partly cloudy. Waves 1 foot or less. .FRIDAY...West wind 5 knots becoming south late in the afternoon. Sunny in the morning then becoming partly sunny. Waves 1 foot or less. .FRIDAY NIGHT...Southwest wind 5 knots. Chance of rain showers through the night. Waves 1 foot or less. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH