FZUS53 KDLH 210907 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 407 AM 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. LSZ140-211600- Grand Portage to Grand Marais MN- 407 AM CDT Sat Mar 21 2026 .TODAY...East wind 10 to 15 knots. Gusts up to 20 knots late in the afternoon. Snow with freezing rain and light sleet likely in the morning, then chance of snow, rain, light freezing rain and light sleet in the afternoon. Waves 1 to 3 feet. .TONIGHT...Northeast wind 15 to 20 knots. Gusts up to 20 knots increasing to 25 knots in the late evening and overnight. Slight chance of snow in the evening. Waves 1 to 3 feet. .SUNDAY...Northeast wind 15 to 20 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...East wind 5 to 10 knots becoming west in the late evening and overnight. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ141-211600- Grand Marais to Taconite Harbor MN- 407 AM CDT Sat Mar 21 2026 .TODAY...Northeast wind 5 to 10 knots. Rain likely, chance of snow, light sleet and freezing rain likely in the morning, then chance of sprinkles and flurries in the afternoon. Waves 1 to 2 feet. .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots after midnight. Slight chance of rain in the evening. Slight chance of snow through the night. Waves 1 to 2 feet. .SUNDAY...Northeast wind 10 to 15 knots with gusts to around 20 knots becoming southeast 5 to 10 knots late in the afternoon. Mostly sunny. Waves 1 to 2 feet. .SUNDAY NIGHT...Southeast wind 5 knots becoming west early in the morning. Mostly cloudy. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ142-211600- Taconite Harbor to Silver Bay Harbor MN- 407 AM CDT Sat Mar 21 2026 .TODAY...Northeast wind 5 to 10 knots. Slight chance of snow early in the morning. Chance of rain in the morning, then chance of sprinkles and flurries early in the afternoon. Patchy fog early in the afternoon. Waves 1 foot or less. .TONIGHT...Northeast wind 5 to 10 knots. Chance of rain in the evening. Chance of snow through the night. Waves 1 to 2 feet. .SUNDAY...Northeast wind 5 to 10 knots becoming southeast late in the afternoon. Partly sunny. Waves 1 to 2 feet. .SUNDAY NIGHT...Southeast wind 5 knots becoming west after midnight. Mostly cloudy. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ143-211600- Silver Bay Harbor to Two Harbors MN- 407 AM CDT Sat Mar 21 2026 .TODAY...Northeast wind 5 knots. Patchy fog until late afternoon. Chance of rain and slight chance of light freezing rain early in the morning. Chance of flurries and slight chance of rain late in the morning, then chance of sprinkles early in the afternoon. Waves 1 foot or less. .TONIGHT...Northeast wind 5 to 10 knots. Chance of rain in the evening. Chance of snow through the night. Waves 1 to 2 feet. .SUNDAY...Northeast wind 10 to 15 knots becoming east 5 to 10 knots late in the afternoon. Partly sunny. Waves 1 to 3 feet. .SUNDAY NIGHT...East wind 5 knots early in the evening becoming variable 10 knots or less, then becoming west 5 knots early in the morning. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ144-211600- Two Harbors to Duluth MN- 407 AM CDT Sat Mar 21 2026 .TODAY...Northeast wind 5 to 10 knots. Slight chance of light freezing rain early in the morning. Chance of sprinkles and flurries in the morning. Waves 1 foot or less. .TONIGHT...Northeast wind 10 to 15 knots. Rain likely in the evening, then chance of snow and rain after midnight. Waves 1 to 2 feet. .SUNDAY...Northeast wind 10 to 15 knots. Partly sunny. Waves 1 to 3 feet. .SUNDAY NIGHT...East wind 5 knots becoming west after midnight. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ145-211600- Duluth MN to Port Wing WI- 407 AM CDT Sat Mar 21 2026 .TODAY...Northeast wind 5 to 10 knots. Chance of sprinkles and flurries in the morning. Waves 1 foot or less. .TONIGHT...Northeast wind 10 to 15 knots. Chance of rain through the night. Slight chance of snow after midnight. Waves 1 to 2 feet. .SUNDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots early in the morning. Partly sunny. Waves 1 to 3 feet. .SUNDAY NIGHT...East wind 5 knots becoming southwest after midnight. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ146-211600- Port Wing to Sand Island WI- 407 AM CDT Sat Mar 21 2026 .TODAY...Northeast wind 5 knots becoming north late in the afternoon. Patchy fog until late afternoon. Slight chance of rain and chance of light freezing rain early in the morning. Chance of flurries late in the morning. Chance of sprinkles in the late morning and early afternoon. Waves 1 foot or less. .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots early in the morning. Chance of rain through the night. Chance of snow after midnight. Waves 1 to 3 feet. .SUNDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the morning. Partly sunny. Waves 2 to 4 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 west 5 knots early in the morning. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 3 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ147-211600- Sand Island to Bayfield WI- 407 AM CDT Sat Mar 21 2026 .TODAY...East wind 5 knots becoming north late in the afternoon. Patchy fog until late afternoon. Chance of rain and slight chance of light freezing rain early in the morning. Slight chance of rain late in the morning, then chance of sprinkles and flurries early in the afternoon. Waves 1 foot or less. .TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots early in the morning. Chance of rain through the night. Chance of snow after midnight. Waves 1 to 2 feet building to 1 to 3 feet early in the morning. .SUNDAY...Northeast wind 10 to 15 knots with gusts to around 20 knots easing to 5 to 10 knots in the afternoon. Mostly cloudy. Waves 2 to 4 feet. A small craft advisory may be needed. .SUNDAY NIGHT...East wind 5 knots becoming southwest after midnight. Partly cloudy. Waves 1 to 3 feet subsiding to 1 to 2 feet in the late evening and overnight. Note...Wave height forecasts are for ice free areas. $$ LSZ150-211600- Outer Apostle Islands Beyond 5 NM from Mainland- 407 AM CDT Sat Mar 21 2026 .TODAY...East wind 5 to 10 knots becoming north late in the afternoon. Chance of light freezing rain early in the morning. Chance of rain in the morning, then chance of sprinkles and flurries early in the afternoon. Waves 1 foot or less. .TONIGHT...Northeast wind 15 to 20 knots with gusts to around 25 knots. Chance of rain and light freezing rain in the evening. Chance of snow after midnight. Waves 1 to 3 feet building to 3 to 5 feet after midnight. Waves occasionally to 7 feet. A small craft advisory may be needed. .SUNDAY...Northeast wind 15 to 20 knots with gusts to around 25 knots easing to 5 to 10 knots late in the afternoon. Partly sunny. 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 southeast late in the evening, then becoming southwest after midnight. Partly cloudy in the evening then becoming mostly cloudy. Waves 2 to 4 feet subsiding to 1 to 2 feet after midnight. A small craft advisory may be needed. Note...Wave height forecasts are for ice free areas. $$ LSZ148-211600- Oak Point to Saxon Harbor WI- 407 AM CDT Sat Mar 21 2026 .TODAY...Southeast wind 5 to 10 knots becoming east early in the afternoon, then becoming north late in the afternoon. Chance of flurries early in the morning. Slight chance of rain in the morning, then chance of sprinkles early in the afternoon. Waves 1 to 3 feet. .TONIGHT...North wind 15 to 20 knots. Chance of rain and light freezing rain through the night. Chance of snow after midnight. Waves 4 to 6 feet. Waves occasionally to 8 feet. A small craft advisory may be needed. .SUNDAY...Northeast wind 15 to 20 knots with gusts to around 25 knots easing to 5 to 10 knots late in the afternoon. Mostly cloudy. Waves 4 to 7 feet. Waves occasionally to 9 feet. A small craft advisory may be needed. .SUNDAY NIGHT...East wind 5 knots becoming southeast late in the evening, then becoming southwest after midnight. Partly cloudy. Waves 4 to 6 feet subsiding to 1 to 3 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. Note...Wave height forecasts are for ice free areas. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH