FZUS53 KDLH 170623 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 123 AM CDT Fri Apr 17 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. LSZ140-171600- Grand Portage to Grand Marais MN- 123 AM CDT Fri Apr 17 2026 .TODAY...Northeast wind 10 to 15 knots. Patchy fog early in the morning. Patchy fog late in the afternoon. Chance of rain and slight chance of thunderstorms early in the afternoon. Rain and chance of thunderstorms late in the afternoon. Waves 1 to 3 feet. .TONIGHT...Northwest wind 15 to 20 knots. Gusts up to 35 knots decreasing to 25 knots. Patchy fog in the evening. Rain likely and chance of thunderstorms in the evening. Waves 1 to 3 feet. A gale warning may be needed. .SATURDAY...West wind 15 to 20 knots with gusts to around 30 knots. Partly sunny. Waves 1 to 3 feet building to 2 to 4 feet in the late morning and afternoon. A small craft advisory may be needed. .SATURDAY NIGHT...Northwest wind 20 to 25 knots. Gusts up to 30 knots decreasing to 25 knots early in the morning. Mostly cloudy. Waves 2 to 4 feet subsiding to 1 to 3 feet early in the morning. A small craft advisory may be needed. Note...Wave height forecasts are for ice free areas. $$ LSZ141-171600- Grand Marais to Taconite Harbor MN- 123 AM CDT Fri Apr 17 2026 .TODAY...Northeast wind 5 to 10 knots becoming north with gusts to around 30 knots late in the afternoon. Chance of rain and slight chance of thunderstorms early in the afternoon. Rain and chance of thunderstorms late in the afternoon. Patchy fog late in the afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .TONIGHT...Northwest wind 15 to 20 knots. Gusts up to 35 knots decreasing to 30 knots after midnight. Chance of rain and thunderstorms in the evening. Waves 1 to 3 feet. A gale warning may be needed. .SATURDAY...West wind 15 to 20 knots with gusts to around 30 knots. Mostly sunny. Waves 1 to 3 feet building to 2 to 4 feet in the late morning and afternoon. .SATURDAY NIGHT...Northwest wind 15 to 20 knots. Gusts up to 30 knots decreasing to 25 knots after midnight. Partly cloudy. Waves 1 to 3 feet subsiding to 1 to 2 feet in the late evening and overnight. Note...Wave height forecasts are for ice free areas. $$ LSZ142-171600- Taconite Harbor to Silver Bay Harbor MN- 123 AM CDT Fri Apr 17 2026 .TODAY...Northeast wind 5 to 10 knots becoming north with gusts to around 30 knots late in the afternoon. Patchy fog early in the morning. Patchy fog late in the afternoon. Rain likely early in the afternoon. Chance of thunderstorms in the afternoon. Rain late in the afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .TONIGHT...West wind 15 to 20 knots. Gusts up to 35 knots decreasing to 25 knots. Chance of rain and thunderstorms in the evening. Waves 1 to 2 feet. A gale warning may be needed. .SATURDAY...West wind 15 to 20 knots with gusts to around 25 knots. Mostly sunny. Waves 1 to 3 feet. .SATURDAY NIGHT...Northwest wind 15 to 20 knots with gusts to around 25 knots easing to 5 to 10 knots with gusts to around 20 knots after midnight. Partly cloudy. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ143-171600- Silver Bay Harbor to Two Harbors MN- 123 AM CDT Fri Apr 17 2026 .TODAY...Northeast wind 5 to 10 knots becoming northwest with gusts to around 25 knots late in the afternoon. Chance of rain early in the afternoon. Chance of thunderstorms in the afternoon. Rain late in the afternoon. Patchy fog late in the afternoon. Waves 1 to 3 feet. .TONIGHT...West wind 15 to 20 knots. Gusts up to 30 knots decreasing to 25 knots in the late evening and overnight. Chance of rain and thunderstorms in the evening. Waves 1 to 2 feet. .SATURDAY...West wind 15 to 20 knots with gusts to around 25 knots. Partly sunny. Waves 1 to 3 feet. .SATURDAY NIGHT...Northwest wind 10 to 15 knots. Gusts up to 25 knots. Partly cloudy. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ144-171600- Two Harbors to Duluth MN- 123 AM CDT Fri Apr 17 2026 .TODAY...Northeast wind 5 to 10 knots with gusts to around 20 knots becoming northwest 10 to 15 knots with gusts to around 25 knots late in the afternoon. Slight chance of rain late in the morning. Rain and chance of thunderstorms in the afternoon. Patchy fog late in the afternoon. Waves 1 to 3 feet. .TONIGHT...West wind 15 to 20 knots with gusts to around 25 knots. Chance of rain and thunderstorms in the evening. Waves 1 to 3 feet. .SATURDAY...West wind 15 to 20 knots. Gusts up to 30 knots decreasing to 25 knots in the late morning and afternoon. Partly sunny. Waves 2 to 4 feet. .SATURDAY NIGHT...Northwest wind 20 to 25 knots easing to 10 to 15 knots with gusts to around 20 knots after midnight. Partly cloudy. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late evening and overnight. A small craft advisory may be needed. Note...Wave height forecasts are for ice free areas. $$ LSZ145-171600- Duluth MN to Port Wing WI- 123 AM CDT Fri Apr 17 2026 .TODAY...Northeast wind 5 to 10 knots with gusts to around 20 knots becoming northwest 10 to 15 knots with gusts to around 30 knots late in the afternoon. Slight chance of rain late in the morning. Rain and chance of thunderstorms in the afternoon. Patchy fog late in the afternoon. Waves 1 to 3 feet. .TONIGHT...West wind 15 to 20 knots. Gusts up to 30 knots decreasing to 25 knots in the late evening and overnight. Chance of rain and thunderstorms in the evening. Waves 2 to 4 feet. A small craft advisory may be needed. .SATURDAY...West wind 15 to 20 knots. Gusts up to 25 knots increasing to 30 knots late in the afternoon. Partly sunny. Waves 3 to 5 feet. A small craft advisory may be needed. .SATURDAY NIGHT...West wind 20 to 25 knots becoming northwest 10 to 15 knots with gusts to around 20 knots after midnight. Partly cloudy. Waves 3 to 5 feet subsiding to 1 to 2 feet early in the morning. A small craft advisory may be needed. Note...Wave height forecasts are for ice free areas. $$ LSZ146-171600- Port Wing to Sand Island WI- 123 AM CDT Fri Apr 17 2026 .TODAY...Northeast wind 5 to 10 knots becoming northwest 10 to 15 knots with gusts to around 20 knots late in the afternoon. Chance of rain early in the afternoon. Chance of thunderstorms in the afternoon. Rain late in the afternoon. Patchy fog late in the afternoon. Waves 1 to 3 feet. .TONIGHT...West wind 20 to 25 knots. Chance of rain and thunderstorms in the evening. Waves 1 to 2 feet building to 2 to 4 feet in the late evening and overnight. A small craft advisory may be needed. .SATURDAY...West wind 20 to 25 knots easing to 15 to 20 knots in the late morning and afternoon. Partly sunny. Waves 3 to 5 feet. A small craft advisory may be needed. .SATURDAY NIGHT...West wind 15 to 20 knots with gusts to around 25 knots becoming northwest 10 knots with gusts to around 20 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves 3 to 5 feet subsiding to 1 to 2 feet early in the morning. A small craft advisory may be needed. Note...Wave height forecasts are for ice free areas. $$ LSZ147-171600- Sand Island to Bayfield WI- 123 AM CDT Fri Apr 17 2026 .TODAY...East wind 5 to 10 knots becoming northwest 10 to 15 knots with gusts to around 25 knots late in the afternoon. Chance of rain early in the afternoon. Chance of thunderstorms in the afternoon. Rain late in the afternoon. Patchy fog late in the afternoon. Waves 1 to 3 feet. .TONIGHT...West wind 20 to 25 knots. Chance of thunderstorms and slight chance of rain in the evening. Waves 1 to 2 feet building to 2 to 4 feet after midnight. A small craft advisory may be needed. .SATURDAY...West wind 20 to 25 knots. Partly sunny. Waves 3 to 5 feet. A small craft advisory may be needed. .SATURDAY NIGHT...Northwest wind 15 to 20 knots with gusts to around 25 knots easing to 5 to 10 knots with gusts to around 20 knots early in the morning. Mostly cloudy in the evening then becoming partly cloudy. Waves 3 to 5 feet subsiding to 1 to 3 feet early in the morning. A small craft advisory may be needed. Note...Wave height forecasts are for ice free areas. $$ LSZ150-171600- Outer Apostle Islands Beyond 5 NM from Mainland- 123 AM CDT Fri Apr 17 2026 .TODAY...East wind 10 to 15 knots becoming west with gusts to around 25 knots late in the afternoon. Slight chance of rain early in the afternoon. Chance of thunderstorms in the afternoon. Rain late in the afternoon. Patchy fog late in the afternoon. Waves 1 to 3 feet. .TONIGHT...West wind 20 to 25 knots. Patchy fog in the evening. Chance of rain and thunderstorms in the evening. Waves 1 to 3 feet building to 2 to 4 feet after midnight. A small craft advisory may be needed. .SATURDAY...West wind 20 to 25 knots with gusts to around 30 knots. Partly sunny. Waves 4 to 6 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. .SATURDAY NIGHT...Northwest wind 15 to 20 knots. Gusts up to 25 knots decreasing to 20 knots early in the morning. Partly cloudy. Waves 3 to 5 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. Note...Wave height forecasts are for ice free areas. $$ LSZ121-171600- Chequamegon Bay-Bayfield to Oak Point WI- 123 AM CDT Fri Apr 17 2026 .TODAY...South wind 10 to 15 knots with gusts to around 20 knots becoming southwest with gusts to around 25 knots late in the afternoon. Rain likely early in the afternoon. Chance of thunderstorms in the afternoon. Rain late in the afternoon. Waves 1 foot or less. .TONIGHT...West wind 10 to 15 knots with gusts to around 25 knots. Chance of rain and thunderstorms in the evening. Waves 1 to 2 feet. .SATURDAY...West wind 15 to 20 knots with gusts to around 25 knots. Partly sunny. Waves 1 to 2 feet. .SATURDAY NIGHT...Northwest wind 10 to 15 knots. Gusts up to 25 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ148-171600- Oak Point to Saxon Harbor WI- 123 AM CDT Fri Apr 17 2026 .TODAY...South wind 10 to 15 knots. Gusts up to 20 knots increasing to 25 knots late in the morning, then decreasing to 20 knots early in the afternoon increasing to 25 knots late in the afternoon. Chance of rain early in the afternoon. Chance of thunderstorms in the afternoon. Rain late in the afternoon. Waves 1 to 2 feet. .TONIGHT...West wind 15 to 20 knots. Gusts up to 20 knots increasing to 25 knots in the late evening and overnight. Chance of rain and thunderstorms in the evening. Waves 1 to 3 feet. .SATURDAY...West wind 15 to 20 knots with gusts to around 25 knots. Partly sunny. Waves 2 to 4 feet. .SATURDAY NIGHT...Northwest wind 15 to 20 knots. Gusts up to 25 knots decreasing to 20 knots after midnight. Mostly cloudy in the evening then becoming partly cloudy. Waves 2 to 4 feet subsiding to 1 to 3 feet after midnight. Note...Wave height forecasts are for ice free areas. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH