FZUS53 KDLH 180815 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 315 AM CDT Sat Apr 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. LSZ140-181600- Grand Portage to Grand Marais MN- 315 AM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...West wind 20 to 25 knots. Gusts up to 25 knots increasing to 30 knots in the late morning and afternoon. Chance of flurries in the afternoon. Waves 4 to 6 feet. Waves occasionally to 8 feet. .TONIGHT...Northwest wind 20 to 25 knots. Gusts up to 30 knots decreasing to 25 knots after midnight. Mostly cloudy in the evening then becoming partly cloudy. Waves 3 to 5 feet subsiding to 1 to 3 feet. Waves occasionally to 7 feet. .SUNDAY...Northwest wind 15 to 20 knots. Gusts up to 25 knots decreasing to 20 knots in the late morning and afternoon. Mostly sunny. Waves 1 to 2 feet. .SUNDAY NIGHT...Northwest wind 10 to 15 knots. Gusts up to 20 knots early in the evening. Mostly clear. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ141-181600- Grand Marais to Taconite Harbor MN- 315 AM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...West wind 20 to 25 knots. Gusts up to 25 knots increasing to 30 knots in the late morning and afternoon. Chance of flurries in the afternoon. Waves 3 to 5 feet. .TONIGHT...Northwest wind 15 to 20 knots. Gusts up to 30 knots decreasing to 20 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves 2 to 4 feet subsiding to 1 to 2 feet after midnight. .SUNDAY...Northwest wind 10 to 15 knots with gusts to around 20 knots. Sunny. Waves 1 foot or less. .SUNDAY NIGHT...Northwest wind 5 to 10 knots. Mostly clear. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ142-181600- Taconite Harbor to Silver Bay Harbor MN- 315 AM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...West wind 15 to 20 knots with gusts to around 25 knots. Partly sunny. Waves 1 to 2 feet building to 1 to 3 feet in the afternoon. .TONIGHT...West wind 15 to 20 knots with gusts to around 25 knots becoming northwest 5 to 10 knots with gusts to around 20 knots after midnight. Mostly cloudy in the evening then clearing. Waves 1 to 3 feet. .SUNDAY...Northwest wind 5 to 10 knots. Gusts up to 20 knots in the morning. Sunny. Waves 1 foot or less. .SUNDAY NIGHT...Northwest wind 5 to 10 knots. Mostly clear. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ143-181600- Silver Bay Harbor to Two Harbors MN- 315 AM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...West wind 15 to 20 knots with gusts to around 25 knots. Partly sunny. Waves 1 to 3 feet building to 2 to 4 feet in the late morning and afternoon. .TONIGHT...West wind 15 to 20 knots with gusts to around 25 knots becoming northwest 5 to 10 knots with gusts to around 20 knots after midnight. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 3 feet subsiding to 1 to 2 feet in the late evening and overnight. .SUNDAY...Northwest wind 5 to 10 knots. Gusts up to 20 knots early in the morning. Sunny. Waves 1 foot or less. .SUNDAY NIGHT...Northwest wind 5 knots. Mostly clear. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ144-181600- Two Harbors to Duluth MN- 315 AM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...West wind 20 to 25 knots with gusts to around 30 knots. Partly sunny. Waves 2 to 4 feet. .TONIGHT...West wind 20 to 25 knots with gusts to around 30 knots becoming northwest 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. .SUNDAY...Northwest wind 10 to 15 knots. Sunny. Waves 1 foot or less. .SUNDAY NIGHT...Northwest wind 5 to 10 knots becoming southwest early in the morning. Mostly clear. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ145-181600- Duluth MN to Port Wing WI- 315 AM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...West wind 20 to 25 knots with gusts to around 30 knots. Chance of flurries early in the afternoon. Chance of sprinkles late in the afternoon. Waves 4 to 6 feet. Waves occasionally to 7 feet. .TONIGHT...West wind 20 to 25 knots with gusts to around 30 knots becoming northwest 10 to 15 knots with gusts to around 20 knots after midnight. Partly cloudy. Waves 3 to 5 feet subsiding to 1 to 3 feet after midnight. Waves occasionally to 7 feet. .SUNDAY...Northwest wind 10 to 15 knots. Gusts up to 20 knots early in the morning. Sunny. Waves 1 to 2 feet. .SUNDAY NIGHT...Northwest wind 5 to 10 knots becoming south early in the morning. Mostly clear. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ146-181600- Port Wing to Sand Island WI- 315 AM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...West wind 20 to 25 knots with gusts to around 30 knots. Chance of flurries in the afternoon. Chance of sprinkles late in the afternoon. Waves 4 to 6 feet. Waves occasionally to 8 feet. .TONIGHT...Northwest wind 15 to 20 knots. Gusts up to 30 knots decreasing to 20 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves 4 to 6 feet subsiding to 1 to 3 feet. Waves occasionally to 8 feet. .SUNDAY...Northwest wind 10 to 15 knots with gusts to around 20 knots becoming west 5 knots late in the afternoon. Sunny. Waves 1 to 2 feet. .SUNDAY NIGHT...Northwest wind 5 knots becoming south early in the morning. Mostly clear. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ147-181600- Sand Island to Bayfield WI- 315 AM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...West wind 15 to 20 knots with gusts to around 30 knots. Chance of flurries in the afternoon. Chance of sprinkles late in the afternoon. Waves 4 to 6 feet. Waves occasionally to 8 feet. .TONIGHT...Northwest wind 15 to 20 knots. Gusts up to 30 knots decreasing to 20 knots. Chance of sprinkles in the evening. Waves 4 to 6 feet subsiding to 1 to 3 feet. Waves occasionally to 8 feet. .SUNDAY...Northwest wind 10 to 15 knots with gusts to around 20 knots becoming west 5 knots late in the afternoon. Sunny. Waves 1 to 2 feet. .SUNDAY NIGHT...Northwest wind 5 knots becoming north after midnight, then becoming east early in the morning. Mostly clear. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ150-181600- Outer Apostle Islands Beyond 5 NM from Mainland- 315 AM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...West wind 20 to 25 knots with gusts to around 30 knots. Chance of flurries in the afternoon. Chance of sprinkles late in the afternoon. Waves 4 to 7 feet. Waves occasionally to 9 feet. .TONIGHT...Northwest wind 15 to 20 knots. Gusts up to 30 knots decreasing to 20 knots. Chance of sprinkles and flurries in the evening. Waves 4 to 7 feet subsiding to 2 to 4 feet early in the morning. Waves occasionally to 9 feet. .SUNDAY...Northwest wind 10 to 15 knots. Gusts up to 20 knots until late afternoon. Sunny. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .SUNDAY NIGHT...Northwest wind 5 to 10 knots becoming northeast early in the morning. Mostly clear. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ121-181600- Chequamegon Bay-Bayfield to Oak Point WI- 315 AM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...West wind 15 to 20 knots. Gusts up to 25 knots increasing to 30 knots late in the afternoon. Chance of flurries in the afternoon. Chance of sprinkles late in the afternoon. Waves 1 to 2 feet. .TONIGHT...West wind 15 to 20 knots with gusts to around 25 knots becoming northwest 5 to 10 knots with gusts to around 20 knots after midnight. Chance of sprinkles in the evening. Waves 1 to 2 feet. .SUNDAY...Northwest wind 5 to 10 knots. Sunny. Waves 1 foot or less. .SUNDAY NIGHT...Northwest wind 5 knots becoming southwest early in the morning. Mostly clear. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ148-181600- Oak Point to Saxon Harbor WI- 315 AM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...West wind 15 to 20 knots. Gusts up to 25 knots increasing to 30 knots in the late morning and afternoon. Chance of flurries in the afternoon. Chance of sprinkles late in the afternoon. Waves 2 to 4 feet. .TONIGHT...Northwest wind 15 to 20 knots. Gusts up to 25 knots decreasing to 20 knots after midnight. Chance of sprinkles and flurries in the evening. Waves 2 to 4 feet subsiding to 1 to 2 feet after midnight. .SUNDAY...Northwest wind 10 to 15 knots. Gusts up to 20 knots early in the morning. Sunny. Waves 1 to 2 feet. .SUNDAY NIGHT...Northwest wind 5 knots becoming south early in the morning. Mostly clear. 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