FZUS53 KDLH 121821 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 121 PM CDT Thu Mar 12 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. LSZ140-122200- Grand Portage to Grand Marais MN- 121 PM CDT Thu Mar 12 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING... ...GALE WARNING IN EFFECT FROM 7 PM CDT THIS EVENING THROUGH FRIDAY MORNING... .REST OF TODAY...Southeast wind 5 knots rising to 10 to 15 knots with gusts to around 20 knots late. Slight chance of snow late. Waves 1 to 2 feet. .TONIGHT...East wind up to 30 knots with gales to around 45 knots rising to gales to 35 knots with storm force gusts to around 50 knots after midnight. Freezing spray and blowing snow. Snow. Waves 4 to 6 feet building to 9 to 14 feet. Waves occasionally to 18 feet. A storm warning may be needed. .FRIDAY...Northeast gales to 35 knots with gales to around 45 knots becoming north 20 to 25 knots with gales to around 40 knots in the late morning and early afternoon, then easing to 10 to 15 knots with gusts to around 20 knots late in the afternoon. Freezing spray through the day. Snow likely in the morning. Chance of snow in the afternoon. Waves 8 to 13 feet subsiding to 4 to 7 feet. Waves occasionally to 17 feet. .FRIDAY NIGHT...North wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots early in the morning. Partly cloudy. Waves 3 to 5 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. $$ LSZ141-122200- Grand Marais to Taconite Harbor MN- 121 PM CDT Thu Mar 12 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING... ...GALE WARNING IN EFFECT FROM 7 PM CDT THIS EVENING THROUGH FRIDAY MORNING... .REST OF TODAY...Southeast wind 10 to 15 knots. Gusts up to 25 knots late. Chance of snow late. Waves 1 to 2 feet. .TONIGHT...East wind 20 to 25 knots with gales to around 40 knots rising to gales to 35 knots with storm force gusts to around 50 knots in the late evening and overnight. Freezing spray in the evening. Blowing snow through the night. Snow through the night. Waves 4 to 6 feet building to 8 to 13 feet. Waves occasionally to 17 feet. A storm warning may be needed. .FRIDAY...Northeast wind up to 30 knots with gales to around 45 knots becoming north 15 to 20 knots with gales to around 35 knots late in the morning, then becoming northwest 10 to 15 knots with gusts to around 25 knots in the afternoon. Freezing spray in the morning. Snow likely in the morning, then chance of snow in the afternoon. Waves 7 to 12 feet subsiding to 4 to 7 feet. Waves occasionally to 16 feet. .FRIDAY NIGHT...Northwest wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots early in the morning. Partly cloudy. Waves 3 to 5 feet subsiding to 1 to 3 feet after midnight. Waves occasionally to 7 feet. A small craft advisory may be needed. Note...Wave height forecasts are for ice free areas. $$ LSZ142-122200- Taconite Harbor to Silver Bay Harbor MN- 121 PM CDT Thu Mar 12 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING... ...GALE WARNING IN EFFECT FROM 7 PM CDT THIS EVENING THROUGH FRIDAY MORNING... .REST OF TODAY...Southeast wind 10 to 15 knots. Gusts up to 25 knots late. Chance of snow late. Waves 1 to 2 feet. .TONIGHT...East wind up to 30 knots with gales to around 45 knots rising to gales to 35 knots with storm force gusts to around 50 knots after midnight, then becoming northeast up to 30 knots with storm force gusts to around 50 knots early in the morning. Blowing snow in the evening. Areas of blowing snow after midnight. Snow through the night. Waves 4 to 6 feet building to 7 to 12 feet. Waves occasionally to 16 feet. A storm warning may be needed. .FRIDAY...North wind 20 to 25 knots with gales to around 40 knots becoming northwest 10 to 15 knots with gusts to around 25 knots in the afternoon. Snow likely in the morning, then chance of snow in the afternoon. Waves 7 to 12 feet subsiding to 4 to 7 feet. Waves occasionally to 15 feet. .FRIDAY NIGHT...Northwest wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots early in the morning. Partly cloudy. Waves 4 to 6 feet subsiding to 1 to 2 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. Note...Wave height forecasts are for ice free areas. $$ LSZ143-122200- Silver Bay Harbor to Two Harbors MN- 121 PM CDT Thu Mar 12 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING... ...GALE WARNING IN EFFECT FROM 10 PM CDT THIS EVENING THROUGH FRIDAY MORNING... .REST OF TODAY...Southeast wind 5 to 10 knots becoming east 15 to 20 knots with gusts to around 25 knots late. Slight chance of snow late. Waves 1 to 3 feet. .TONIGHT...East wind 20 to 25 knots with gales to around 35 knots rising to gales to 35 knots with gales to around 45 knots in the late evening and early morning, then becoming northeast up to 30 knots with gales to around 45 knots early in the morning. Blowing snow in the evening. Areas of blowing snow after midnight. Snow through the night. Waves 3 to 5 feet building to 8 to 11 feet. Waves occasionally to 15 feet. .FRIDAY...North wind 20 to 25 knots with gales to around 40 knots becoming northwest 10 to 15 knots with gusts to around 25 knots in the afternoon. Chance of snow. Waves 8 to 11 feet subsiding to 5 to 8 feet in the afternoon. Waves occasionally to 15 feet. .FRIDAY NIGHT...Northwest wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots early in the morning. Partly cloudy in the evening then becoming mostly cloudy. Waves 4 to 6 feet subsiding to 1 to 2 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. Note...Wave height forecasts are for ice free areas. $$ LSZ144-122200- Two Harbors to Duluth MN- 121 PM CDT Thu Mar 12 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING... ...GALE WARNING IN EFFECT FROM 10 PM CDT THIS EVENING THROUGH FRIDAY MORNING... .REST OF TODAY...East wind 5 to 10 knots with gusts to around 20 knots rising to 15 to 20 knots with gusts to around 30 knots late. Slight chance of snow early in the afternoon, then chance of snow late. Waves 1 to 3 feet. .TONIGHT...East wind up to 30 knots with gales to around 45 knots becoming northeast with gales to around 40 knots early in the morning. Areas of blowing snow in the evening. Patchy blowing snow after midnight. Snow through the night. Slight chance of rain after midnight. Waves 7 to 10 feet. Waves occasionally to 12 feet. .FRIDAY...North wind 20 to 25 knots with gales to around 40 knots becoming northwest 10 to 15 knots with gusts to around 25 knots in the afternoon. Chance of snow through the day. Waves 6 to 9 feet subsiding to 4 to 7 feet in the afternoon. Waves occasionally to 12 feet. .FRIDAY NIGHT...Northwest wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots early in the morning. 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. Note...Wave height forecasts are for ice free areas. $$ LSZ145-122200- Duluth MN to Port Wing WI- 121 PM CDT Thu Mar 12 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY EVENING... .REST OF TODAY...East wind 5 to 10 knots with gusts to around 20 knots rising to 15 to 20 knots with gusts to around 30 knots late. Slight chance of snow early in the afternoon, then chance of snow late. Waves 1 to 2 feet. .TONIGHT...East wind 20 to 25 knots with gales to around 35 knots becoming northeast up to 30 knots with gales to around 40 knots early in the morning. Snow and slight chance of rain. Waves 3 to 5 feet building to 7 to 10 feet. Waves occasionally to 13 feet. A gale warning may be needed. .FRIDAY...North wind up to 30 knots with gales to around 40 knots becoming northwest 10 to 15 knots with gusts to around 25 knots in the afternoon. Chance of snow through the day. Waves 7 to 10 feet subsiding to 4 to 7 feet in the afternoon. Waves occasionally to 14 feet. A gale warning may be needed. .FRIDAY NIGHT...Northwest wind 10 to 15 knots with gusts to around 20 knots becoming west 5 knots early in the morning. Partly cloudy in the evening then becoming mostly cloudy. Waves 2 to 4 feet subsiding to 1 to 2 feet after midnight. Note...Wave height forecasts are for ice free areas. $$ LSZ146-122200- Port Wing to Sand Island WI- 121 PM CDT Thu Mar 12 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY EVENING... .REST OF TODAY...Southeast wind 5 to 10 knots becoming east 15 to 20 knots late. Slight chance of snow late. Waves 1 to 2 feet. .TONIGHT...East wind up to 30 knots with gales to around 40 knots becoming northeast with gales to around 40 knots early in the morning. Snow through the night. Slight chance of rain after midnight. Waves 4 to 7 feet building to 7 to 10 feet early in the morning. Waves occasionally to 13 feet. A gale warning may be needed. .FRIDAY...North wind up to 30 knots with gales to around 35 knots becoming northwest 15 to 20 knots with gusts to around 25 knots early in the afternoon, then easing to 5 to 15 knots with gusts to around 20 knots late in the afternoon. Snow likely in the morning, then chance of snow in the afternoon. Waves 8 to 11 feet subsiding to 5 to 8 feet in the afternoon. Waves occasionally to 15 feet. A gale warning may be needed. .FRIDAY NIGHT...Northwest wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots early in the morning. Partly cloudy in the evening then becoming mostly cloudy. Waves 3 to 5 feet subsiding to 1 to 2 feet after midnight. Waves occasionally to 7 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ147-122200- Sand Island to Bayfield WI- 121 PM CDT Thu Mar 12 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY EVENING... .REST OF TODAY...Southeast wind 10 to 15 knots. Gusts up to 20 knots late. Chance of snow late. Waves 1 to 2 feet. .TONIGHT...East wind up to 30 knots with gales to around 40 knots becoming northeast with gales to around 40 knots early in the morning. Snow. Waves 4 to 6 feet building to 6 to 9 feet early in the morning. Waves occasionally to 12 feet. A gale warning may be needed. .FRIDAY...North wind up to 30 knots with gales to around 40 knots becoming northwest 15 to 20 knots with gusts to around 25 knots in the afternoon. Freezing spray in the morning. Snow likely through the day. Waves 8 to 11 feet subsiding to 6 to 9 feet in the afternoon. Waves occasionally to 14 feet. A gale warning may be needed. .FRIDAY NIGHT...Northwest wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots early in the morning. Partly cloudy in the evening then becoming mostly cloudy. Waves 3 to 5 feet subsiding to 1 to 2 feet after midnight. Waves occasionally to 7 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ150-122200- Outer Apostle Islands Beyond 5 NM from Mainland- 121 PM CDT Thu Mar 12 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM CDT FRIDAY... ...GALE WARNING IN EFFECT FROM 1 AM CDT FRIDAY THROUGH FRIDAY MORNING... .REST OF TODAY...Southeast wind 5 to 10 knots becoming east 15 to 20 knots late. Chance of snow late. Waves 1 to 2 feet. .TONIGHT...East wind up to 30 knots with gales to around 40 knots rising to gales to 35 knots with gales to around 45 knots after midnight. Blowing snow in the evening. Areas of blowing snow after midnight. Snow through the night. Waves 2 to 4 feet building to 7 to 12 feet. Waves occasionally to 15 feet. .FRIDAY...Northeast wind up to 30 knots with gales to around 40 knots becoming northwest 20 to 25 knots with gusts to around 30 knots in the afternoon. Freezing spray in the morning. Snow likely through the day. Waves 8 to 13 feet subsiding to 7 to 10 feet late in the afternoon. Waves occasionally to 17 feet. .FRIDAY NIGHT...Northwest wind 15 to 20 knots easing to 5 knots early in the morning. Partly cloudy in the evening then becoming mostly cloudy. Waves 4 to 7 feet subsiding to 1 to 2 feet. Waves occasionally to 9 feet. A small craft advisory may be needed. Note...Wave height forecasts are for ice free areas. $$ LSZ148-122200- Oak Point to Saxon Harbor WI- 121 PM CDT Thu Mar 12 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY EVENING... .REST OF TODAY...Southeast wind 10 to 15 knots becoming east with gusts to around 20 knots late. Chance of snow late. Waves 1 to 2 feet. .TONIGHT...Southeast wind 20 to 25 knots with gales to around 35 knots becoming northeast with gales to around 35 knots early in the morning. Snow likely in the evening, then snow and slight chance of rain after midnight. Waves 4 to 7 feet. Waves occasionally to 9 feet. A gale warning may be needed. .FRIDAY...Northeast gales to 35 knots becoming north up to 30 knots with gales to around 40 knots late in the morning, then becoming northwest 15 to 20 knots with gusts to around 30 knots in the afternoon. Snow likely. Waves 7 to 10 feet subsiding to 5 to 8 feet late in the afternoon. Waves occasionally to 14 feet. A gale warning may be needed. .FRIDAY NIGHT...Northwest wind 10 to 15 knots with gusts to around 20 knots becoming west 5 knots early in the morning. Partly cloudy in the evening then becoming mostly cloudy. Waves 4 to 6 feet subsiding to 1 to 2 feet. Waves occasionally to 8 feet. Note...Wave height forecasts are for ice free areas. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH