FZUS53 KDLH 182115 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 415 PM 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. LSZ140-190400- Grand Portage to Grand Marais MN- 415 PM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM CDT SUNDAY... .TONIGHT...Northwest wind 20 to 25 knots. Gusts up to 30 knots decreasing to 25 knots after midnight. Mostly cloudy then becoming partly cloudy in the late evening and early morning then becoming mostly cloudy. Waves 3 to 5 feet subsiding to 1 to 3 feet late in the night. .SUNDAY...Northwest wind 15 to 20 knots. Gusts up to 25 knots. Mostly sunny. Waves 1 to 3 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. .MONDAY...Southwest wind 10 to 15 knots with gusts to around 20 knots becoming south 15 to 20 knots with gusts to around 30 knots in the afternoon. Partly sunny. Waves 1 to 2 feet building to 3 to 5 feet in the afternoon. A small craft advisory may be needed. Note...Wave height forecasts are for ice free areas. $$ LSZ141-190400- Grand Marais to Taconite Harbor MN- 415 PM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM CDT SUNDAY... .TONIGHT...Northwest wind 15 to 20 knots. Gusts up to 30 knots decreasing to 20 knots. Mostly cloudy then becoming partly cloudy after midnight then becoming mostly cloudy. Waves 2 to 4 feet subsiding to 1 to 2 feet after midnight. .SUNDAY...Northwest wind 10 to 15 knots. Gusts up to 20 knots in the morning. Mostly sunny. Waves 1 to 2 feet. .SUNDAY NIGHT...Northwest wind 5 to 10 knots until early morning becoming variable 10 knots or less. Mostly clear. Waves 1 foot or less. .MONDAY...Southwest wind 10 to 15 knots with gusts to around 20 knots becoming south with gusts to around 20 knots late in the afternoon. Partly sunny. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ142-190400- Taconite Harbor to Silver Bay Harbor MN- 415 PM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM CDT SUNDAY... .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 early in the evening then becoming partly cloudy. 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 knots until early morning becoming variable 10 knots or less. Mostly clear. Waves 1 foot or less. .MONDAY...South wind 5 to 10 knots. Partly sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ143-190400- Silver Bay Harbor to Two Harbors MN- 415 PM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING... .TONIGHT...West wind 15 to 20 knots with gusts to around 25 knots becoming northwest 5 to 10 knots with gusts to around 20 knots after midnight. Partly cloudy. Waves 1 to 3 feet subsiding to 1 to 2 feet in the late evening and overnight. .SUNDAY...Northwest wind 5 to 10 knots. Sunny. Waves 1 foot or less. .SUNDAY NIGHT...Northwest wind 5 knots until early morning becoming variable 10 knots or less. Mostly clear. Waves 1 foot or less. .MONDAY...South wind 10 to 15 knots. Partly sunny. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ144-190400- Two Harbors to Duluth MN- 415 PM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING... .TONIGHT...West wind 20 to 25 knots with gusts to around 30 knots becoming northwest 5 to 10 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 5 to 10 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. .MONDAY...South wind 10 to 15 knots with gusts to around 20 knots. Partly sunny. Waves 1 to 3 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ145-190400- Duluth MN to Port Wing WI- 415 PM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM CDT SUNDAY... .TONIGHT...West wind 20 to 25 knots with gusts to around 30 knots becoming northwest 10 to 15 knots after midnight. Mostly cloudy then becoming partly cloudy in the late evening and early morning then becoming mostly cloudy. Waves 3 to 5 feet subsiding to 1 to 3 feet after midnight. Waves occasionally to 7 feet. .SUNDAY...Northwest wind 5 to 10 knots. Sunny. Waves 1 to 2 feet. .SUNDAY NIGHT...Northwest wind 5 to 10 knots becoming south early in the morning. Mostly clear. Waves 1 foot or less. .MONDAY...South wind 15 to 20 knots with gusts to around 25 knots. Partly sunny. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ146-190400- Port Wing to Sand Island WI- 415 PM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM CDT SUNDAY... .TONIGHT...West wind 15 to 20 knots with gusts to around 25 knots becoming northwest 10 to 15 knots with gusts to around 20 knots in the late evening and overnight. Mostly cloudy early 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 5 to 10 knots. Mostly sunny. Waves 1 to 3 feet. .SUNDAY NIGHT...North wind 5 knots becoming south early in the morning. Mostly clear. Waves 1 foot or less. .MONDAY...South wind 5 to 10 knots. Partly sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ147-190400- Sand Island to Bayfield WI- 415 PM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING... .TONIGHT...Northwest wind 15 to 20 knots. Gusts up to 25 knots decreasing to 20 knots in the late evening and overnight. Partly cloudy. Waves 3 to 5 feet. Waves occasionally to 7 feet. .SUNDAY...Northwest wind 5 to 10 knots. Mostly sunny. Waves 1 to 3 feet. .SUNDAY NIGHT...Northwest wind 5 knots becoming west early in the morning. Mostly clear. Waves 1 foot or less. .MONDAY...South wind 5 to 10 knots. Partly sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ150-190400- Outer Apostle Islands Beyond 5 NM from Mainland- 415 PM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM CDT SUNDAY... .TONIGHT...Northwest wind 15 to 20 knots. Gusts up to 25 knots decreasing to 20 knots late in the night. Mostly cloudy until early morning then becoming partly cloudy. Waves 4 to 6 feet. Waves occasionally to 8 feet. .SUNDAY...Northwest wind 10 to 15 knots. Gusts up to 20 knots in the morning. Mostly sunny. Waves 2 to 4 feet subsiding to 1 to 2 feet late in the afternoon. A small craft advisory may be needed. .SUNDAY NIGHT...Northwest wind 5 knots. Mostly clear. Waves 1 to 2 feet. .MONDAY...South wind 10 to 15 knots with gusts to around 20 knots. Partly sunny. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ121-190400- Chequamegon Bay-Bayfield to Oak Point WI- 415 PM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING... .TONIGHT...West wind 15 to 20 knots with gusts to around 25 knots becoming northwest 5 to 10 knots after midnight. Partly cloudy until early morning then becoming mostly cloudy. Waves 1 to 2 feet. .SUNDAY...Northwest wind 5 to 10 knots. Mostly sunny. Waves 1 foot or less. .SUNDAY NIGHT...Northwest wind 5 knots becoming southwest early in the morning. Mostly clear. Waves 1 foot or less. .MONDAY...South wind 5 to 10 knots. Gusts up to 20 knots in the afternoon. Partly sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ148-190400- Oak Point to Saxon Harbor WI- 415 PM CDT Sat Apr 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING... .TONIGHT...Northwest wind 15 to 20 knots. Gusts up to 25 knots. Partly cloudy until early morning then becoming mostly 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. Mostly sunny. Waves 1 to 3 feet. .SUNDAY NIGHT...Northwest wind 5 knots becoming southwest early in the morning. Mostly clear. Waves 1 foot or less. .MONDAY...South wind 10 to 15 knots with gusts to around 20 knots. Partly sunny. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH