FZUS53 KDLH 212126 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 425 PM CDT Sat Mar 21 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. LSZ140-220400- Grand Portage to Grand Marais MN- 425 PM CDT Sat Mar 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING... .TONIGHT...Northeast wind 20 to 25 knots easing to 10 to 15 knots late in the night. Gusts up to 30 knots decreasing to 25 knots after midnight. Mostly cloudy until early morning then becoming partly cloudy. Waves 1 to 3 feet. .SUNDAY...Northeast wind 10 to 15 knots with gusts to around 25 knots becoming east 5 to 10 knots late in the afternoon. Mostly sunny. Waves 1 to 3 feet. .SUNDAY NIGHT...Southeast wind 5 to 10 knots becoming west in the late evening and overnight. Mostly cloudy. Waves 1 to 2 feet. .MONDAY...West wind 5 to 10 knots becoming southwest 10 to 15 knots with gusts to around 20 knots in the afternoon. Sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ141-220400- Grand Marais to Taconite Harbor MN- 425 PM CDT Sat Mar 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING... .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 25 knots decreasing to 20 knots in the late evening and overnight. Slight chance of rain and snow late in the evening. Waves 1 to 2 feet. .SUNDAY...Northeast wind 10 to 15 knots with gusts to around 20 knots becoming southeast 5 to 10 knots late in the afternoon. Slight chance of snow in the afternoon. Waves 1 to 2 feet. .SUNDAY NIGHT...Southeast wind 5 to 10 knots becoming west early in the morning. Mostly cloudy. Waves 1 to 2 feet. .MONDAY...Northwest wind 5 knots becoming southwest in the afternoon. Sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ142-220400- Taconite Harbor to Silver Bay Harbor MN- 425 PM CDT Sat Mar 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING... .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots until early morning. Slight chance of rain early in the evening, then chance of rain and snow late in the evening. Waves 1 to 2 feet. .SUNDAY...Northeast wind 5 to 10 knots becoming east in the afternoon. Slight chance of snow in the afternoon. Waves 1 to 3 feet. .SUNDAY NIGHT...Southeast wind 5 knots early in the evening becoming variable 10 knots or less, then becoming west 5 knots after midnight. Mostly cloudy. Waves 1 to 2 feet. .MONDAY...Northwest wind 5 knots becoming south in the afternoon. Sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ143-220400- Silver Bay Harbor to Two Harbors MN- 425 PM CDT Sat Mar 21 2026 .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots until early morning. Slight chance of rain early in the evening, then chance of rain and snow late in the evening. Slight chance of rain and snow after midnight. Waves 1 to 2 feet. .SUNDAY...Northeast wind 10 to 15 knots becoming east 5 to 10 knots late in the afternoon. Chance of snow. Waves 1 to 3 feet. .SUNDAY NIGHT...East wind 5 knots early in the evening becoming variable 10 knots or less, then becoming west 5 knots early in the morning. Mostly cloudy. Waves 1 to 3 feet. .MONDAY...West wind 5 knots becoming south in the afternoon. Sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ144-220400- Two Harbors to Duluth MN- 425 PM CDT Sat Mar 21 2026 .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 25 knots early in the evening then 20 knots after midnight. Slight chance of rain early in the evening. Chance of rain and snow in the late evening and early morning. Patchy fog late in the evening. Waves 1 to 2 feet. .SUNDAY...Northeast wind 10 to 15 knots. Chance of snow through the day. Waves 1 to 3 feet. .SUNDAY NIGHT...Northeast wind 5 knots becoming west after midnight. Partly cloudy. Waves 1 to 3 feet. .MONDAY...West wind 5 knots becoming south in the afternoon. Sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ145-220400- Duluth MN to Port Wing WI- 425 PM CDT Sat Mar 21 2026 .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots increasing to 25 knots after midnight, then decreasing to 20 knots late in the night. Slight chance of rain early in the evening, then chance of rain and snow late in the evening. Slight chance of rain and snow after midnight. Waves 1 to 2 feet building to 1 to 3 feet late in the night. .SUNDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the morning. Chance of snow. Waves 2 to 4 feet. .SUNDAY NIGHT...East wind 5 knots becoming southwest after midnight. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 2 feet. .MONDAY...West wind 5 knots becoming south in the afternoon. Sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ146-220400- Port Wing to Sand Island WI- 425 PM CDT Sat Mar 21 2026 .TONIGHT...Northeast wind 15 to 20 knots. Gusts up to 20 knots increasing to 25 knots after midnight, then decreasing to 20 knots late in the night. Slight chance of rain until early morning. Chance of snow late in the evening, then slight chance of snow after midnight. Waves 1 to 3 feet building to 2 to 4 feet after midnight. .SUNDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the morning. Mostly cloudy in the morning then becoming mostly sunny. Waves 3 to 5 feet. A small craft advisory may be needed. .SUNDAY NIGHT...East wind 5 knots early in the evening becoming variable 10 knots or less, then becoming south 5 knots after midnight becoming west. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 3 feet subsiding to 1 to 2 feet in the late evening and overnight. .MONDAY...West wind 5 knots becoming south late in the afternoon. Sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ147-220400- Sand Island to Bayfield WI- 425 PM CDT Sat Mar 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING... .TONIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots. Chance of snow and rain late in the evening. Slight chance of rain and snow after midnight. Waves 1 to 3 feet building to 3 to 5 feet in the late evening and overnight. .SUNDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the morning. Chance of snow in the morning. Waves 3 to 5 feet. A small craft advisory may be needed. .SUNDAY NIGHT...East wind 5 knots becoming west early in the morning. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 3 feet. .MONDAY...West wind 5 knots becoming south late in the afternoon. Sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ150-220400- Outer Apostle Islands Beyond 5 NM from Mainland- 425 PM CDT Sat Mar 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING... .TONIGHT...Northeast wind 15 to 20 knots with gusts to around 25 knots. Chance of snow, rain and slight chance of light freezing rain late in the evening. Slight chance of rain and snow after midnight. Waves 4 to 7 feet. Waves occasionally to 9 feet. .SUNDAY...Northeast wind 15 to 20 knots with gusts to around 25 knots easing to 5 to 10 knots late in the afternoon. Freezing spray in the morning. Chance of snow through the day. Waves 4 to 7 feet. Waves occasionally to 10 feet. A small craft advisory may be needed. .SUNDAY NIGHT...East wind 5 to 10 knots becoming southwest after midnight. Partly cloudy in the evening then becoming mostly cloudy. Waves 3 to 5 feet subsiding to 1 to 3 feet after midnight. A small craft advisory may be needed. .MONDAY...West wind 5 to 10 knots becoming south late in the afternoon. Sunny. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ148-220400- Oak Point to Saxon Harbor WI- 425 PM CDT Sat Mar 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY MORNING... .TONIGHT...Northeast wind 15 to 20 knots. Gusts up to 25 knots after midnight. Chance of light freezing rain late in the evening. Chance of snow and slight chance of rain in the late evening and early morning. Waves 4 to 7 feet. Waves occasionally to 9 feet. .SUNDAY...Northeast wind 15 to 20 knots. Gusts up to 25 knots. Chance of snow. Waves 4 to 7 feet. Waves occasionally to 9 feet. A small craft advisory may be needed. .SUNDAY NIGHT...East wind 5 to 10 knots becoming southwest after midnight. Partly cloudy in the evening then becoming mostly cloudy. Waves 4 to 6 feet subsiding to 1 to 3 feet after midnight. Waves occasionally to 7 feet. A small craft advisory may be needed. .MONDAY...West wind 5 knots becoming southeast late in the afternoon. Sunny. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH