FZUS53 KDLH 181648 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 1148 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- 1148 AM CDT Thu Jun 18 2026 .REST OF TODAY...Southwest wind 10 to 15 knots. Isolated rain showers late in the morning, then scattered rain showers and isolated thunderstorms in the afternoon. Waves 1 to 2 feet. .TONIGHT...West wind 10 to 15 knots. Gusts up to 20 knots after midnight. Isolated showers and thunderstorms in the evening. Waves 1 foot or less. .FRIDAY...West wind 5 to 10 knots becoming southwest 10 to 15 knots with gusts to around 20 knots in the late morning and afternoon. Mostly sunny. Waves 1 to 3 feet. .FRIDAY NIGHT...Southwest wind 10 to 15 knots with gusts to around 20 knots becoming west 5 knots after midnight. Mostly cloudy. Waves 1 to 2 feet. $$ LSZ141-182200- Grand Marais to Taconite Harbor MN- 1148 AM CDT Thu Jun 18 2026 .REST OF TODAY...West wind 5 to 10 knots. Isolated rain showers through the day. Isolated thunderstorms in the afternoon. Waves 1 foot or less. .TONIGHT...Northwest wind 5 to 10 knots. Partly cloudy. Waves 1 foot or less. .FRIDAY...Northwest wind 5 knots becoming southwest in the late morning and afternoon. Sunny in the morning then becoming partly sunny. Waves 1 foot or less. .FRIDAY NIGHT...Southwest wind 5 knots becoming northwest late in the evening, then becoming variable 10 knots or less after midnight becoming northwest 5 knots early in the morning. Slight chance of rain showers. Waves 1 foot or less. $$ LSZ142-182200- Taconite Harbor to Silver Bay Harbor MN- 1148 AM CDT Thu Jun 18 2026 .REST OF TODAY...West wind 5 to 10 knots. Isolated rain showers in the afternoon. 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. Sunny in the morning then becoming partly sunny. 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 in the evening, then slight chance of rain showers after midnight. Waves 1 foot or less. $$ LSZ143-182200- Silver Bay Harbor to Two Harbors MN- 1148 AM CDT Thu Jun 18 2026 .REST OF TODAY...West wind 5 to 10 knots. Mostly sunny. Waves 1 foot or less. .TONIGHT...West wind 5 knots. Mostly clear. Waves 1 foot or less. .FRIDAY...West wind 5 knots becoming southwest in the late morning and afternoon. Chance of rain showers in the afternoon. Waves 1 foot or less. .FRIDAY NIGHT...Northwest wind 5 knots early in the evening becoming variable 10 knots or less, then becoming northwest 5 knots early in the morning. Chance of rain showers in the evening. Waves 1 foot or less. $$ LSZ144-182200- Two Harbors to Duluth MN- 1148 AM CDT Thu Jun 18 2026 .REST OF TODAY...West wind 10 to 15 knots. Gusts up to 20 knots late in the morning. 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 becoming south in the afternoon. Rain showers likely and slight chance of thunderstorms in the afternoon. Waves 1 foot or less. .FRIDAY NIGHT...West wind 5 knots becoming northwest in the late evening and overnight. Chance of rain showers and slight chance of thunderstorms in the evening. Waves 1 foot or less. $$ LSZ145-182200- Duluth MN to Port Wing WI- 1148 AM CDT Thu Jun 18 2026 .REST OF TODAY...West wind 20 to 25 knots easing to 5 to 10 knots with gusts to around 20 knots late. Mostly sunny. Waves 1 foot or less. .TONIGHT...West wind 5 to 10 knots. Mostly clear. Waves 1 foot or less. .FRIDAY...Southwest wind 5 knots becoming northwest late in the afternoon. Rain showers likely and slight chance of thunderstorms in the afternoon. Waves 1 foot or less. .FRIDAY NIGHT...Northwest wind 5 knots becoming west after midnight. Chance of rain showers and slight chance of thunderstorms in the evening. Waves 1 foot or less. $$ LSZ146-182200- Port Wing to Sand Island WI- 1148 AM CDT Thu Jun 18 2026 .REST OF TODAY...West wind 10 to 15 knots. Mostly sunny. Waves 1 foot or less. .TONIGHT...West 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...West wind 5 knots early in the evening becoming variable 10 knots or less, then becoming west 5 knots after midnight. Chance of rain showers in the evening. Waves 1 foot or less. $$ LSZ147-182200- Sand Island to Bayfield WI- 1148 AM CDT Thu Jun 18 2026 .REST OF TODAY...West wind 10 to 15 knots. Mostly sunny. Waves 1 foot or less. .TONIGHT...West wind 5 to 10 knots. Mostly clear. Waves 1 foot or less. .FRIDAY...West wind 5 knots becoming southwest late in the afternoon. Mostly sunny. Waves 1 foot or less. .FRIDAY NIGHT...Southwest wind 5 knots in the evening becoming variable 10 knots or less, then becoming west 5 knots early in the morning. Chance of rain showers in the evening. Waves 1 foot or less. $$ LSZ150-182200- Outer Apostle Islands Beyond 5 NM from Mainland- 1148 AM CDT Thu Jun 18 2026 .REST OF TODAY...West wind 10 to 15 knots. Mostly sunny. Waves 1 foot or less. .TONIGHT...West wind 5 to 10 knots. Mostly clear. Waves 1 foot or less. .FRIDAY...West wind 5 knots becoming south in the afternoon. Mostly sunny. Waves 1 foot or less. .FRIDAY NIGHT...South wind 5 knots becoming west after midnight. Chance of rain showers in the evening. Waves 1 foot or less. $$ LSZ121-182200- Chequamegon Bay-Bayfield to Oak Point WI- 1148 AM CDT Thu Jun 18 2026 .REST OF TODAY...West wind 5 to 10 knots. Mostly sunny. Waves 1 foot or less. .TONIGHT...Northwest wind 5 to 10 knots. Mostly clear. Waves 1 foot or less. .FRIDAY...West wind 5 knots becoming south early in the afternoon, then becoming east late in the afternoon. Chance of rain showers in the afternoon. Waves 1 foot or less. .FRIDAY NIGHT...South wind 5 knots becoming west after midnight. Chance of rain showers in the evening. Waves 1 foot or less. $$ LSZ148-182200- Oak Point to Saxon Harbor WI- 1148 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. Mostly clear. Waves 1 foot or less. .FRIDAY...West wind 5 knots becoming east in the afternoon. Slight chance of rain showers in the afternoon. Waves 1 foot or less. .FRIDAY NIGHT...South wind 5 knots becoming west after midnight. Chance of rain showers in the evening, then slight chance of rain showers after midnight. Waves 1 foot or less. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH