FZUS53 KDLH 152121 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 421 PM CDT Sun Mar 15 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. LSZ140-160400- Grand Portage to Grand Marais MN- 421 PM CDT Sun Mar 15 2026 ...GALE WARNING IN EFFECT UNTIL 7 PM CDT THIS EVENING... ...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH MONDAY AFTERNOON... ...STORM WARNING IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...North gales to 35 knots with storm force gusts to around 50 knots. Slight chance of snow early in the evening. Heavy freezing spray through the night. Waves 5 to 8 feet. Waves occasionally to 11 feet. .MONDAY...North gales to 35 knots with storm force gusts to around 50 knots easing to up to 30 knots with gales to around 45 knots late in the afternoon. Heavy freezing spray. Waves 5 to 8 feet. Waves occasionally to 10 feet. .MONDAY NIGHT...North wind up to 30 knots with gales to around 40 knots easing to 15 to 20 knots with gusts to around 25 knots early in the morning. Partly cloudy. Waves 3 to 5 feet subsiding to 1 to 2 feet early in the morning. Waves occasionally to 7 feet. A gale warning may be needed. .TUESDAY...Northwest wind 10 to 15 knots with gusts to around 20 knots becoming southwest late in the afternoon. Mostly sunny. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ141-160400- Grand Marais to Taconite Harbor MN- 421 PM CDT Sun Mar 15 2026 ...GALE WARNING IN EFFECT THROUGH LATE MONDAY NIGHT... ...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...North wind up to 30 knots. Gales up to 40 knots increasing to 45 knots after midnight. Heavy freezing spray. Waves 4 to 7 feet. Waves occasionally to 9 feet. .MONDAY...North wind up to 30 knots. Storm force gusts up to 50 knots decreasing to 35 knots. Heavy freezing spray in the morning. Waves 4 to 6 feet subsiding to 2 to 4 feet late in the afternoon. Waves occasionally to 8 feet. A storm warning may be needed. .MONDAY NIGHT...North wind 20 to 25 knots with gales to around 35 knots becoming northwest 10 to 15 knots with gusts to around 25 knots after midnight. Mostly clear. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late evening and overnight. .TUESDAY...Northwest wind 5 to 10 knots becoming southwest late in the afternoon. Sunny in the morning then becoming partly sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ142-160400- Taconite Harbor to Silver Bay Harbor MN- 421 PM CDT Sun Mar 15 2026 ...GALE WARNING IN EFFECT THROUGH MONDAY AFTERNOON... ...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...North wind up to 30 knots. Gusts up to 35 knots increasing to 45 knots. Slight chance of snow in the evening. Heavy freezing spray through the night. Waves 5 to 8 feet. Waves occasionally to 11 feet. .MONDAY...North wind up to 30 knots. Gales up to 45 knots decreasing to 30 knots. Heavy freezing spray in the morning. Waves 4 to 7 feet subsiding to 3 to 5 feet in the afternoon. Waves occasionally to 9 feet. .MONDAY NIGHT...North wind 15 to 20 knots with gusts to around 30 knots becoming northwest 5 to 10 knots with gusts to around 20 knots early in the morning. Mostly clear. Waves 1 to 3 feet subsiding to 1 to 2 feet in the late evening and overnight. .TUESDAY...Northwest wind 5 to 10 knots becoming southwest late in the afternoon. Mostly sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ143-160400- Silver Bay Harbor to Two Harbors MN- 421 PM CDT Sun Mar 15 2026 ...GALE WARNING IN EFFECT THROUGH MONDAY MORNING... ...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH MONDAY MORNING... .TONIGHT...North wind up to 30 knots. Gusts up to 35 knots increasing to 40 knots late in the night. Chance of snow early in the evening. Slight chance of snow late in the evening. Freezing spray through the night. Waves 6 to 9 feet. Waves occasionally to 12 feet. .MONDAY...North wind up to 30 knots with gales to around 40 knots easing to 15 to 20 knots with gusts to around 30 knots late in the afternoon. Heavy freezing spray in the morning. Waves 4 to 7 feet subsiding to 3 to 5 feet in the afternoon. Waves occasionally to 10 feet. .MONDAY NIGHT...Northwest wind 15 to 20 knots with gusts to around 25 knots easing to 5 to 10 knots early in the morning. Mostly clear. Waves 1 to 3 feet subsiding to 1 to 2 feet in the late evening and overnight. .TUESDAY...Northwest wind 5 to 10 knots becoming southwest late in the afternoon. Mostly sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ144-160400- Two Harbors to Duluth MN- 421 PM CDT Sun Mar 15 2026 ...GALE WARNING IN EFFECT THROUGH MONDAY MORNING... ...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH MONDAY MORNING... .TONIGHT...North wind up to 30 knots. Gusts up to 35 knots increasing to 40 knots late in the night. Chance of snow early in the evening. Slight chance of snow late in the evening. Freezing spray through the night. Waves 6 to 9 feet subsiding to 4 to 7 feet after midnight. Waves occasionally to 12 feet. .MONDAY...North wind up to 30 knots. Gusts up to 35 knots decreasing to 30 knots in the afternoon. Heavy freezing spray in the morning. Waves 4 to 7 feet subsiding to 3 to 5 feet in the afternoon. Waves occasionally to 9 feet. .MONDAY NIGHT...Northwest wind 20 to 25 knots easing to 10 to 15 knots with gusts to around 20 knots after midnight. Mostly clear. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late evening and overnight. A small craft advisory may be needed. .TUESDAY...Northwest wind 5 to 10 knots becoming south late in the afternoon. Mostly sunny. Waves 1 foot or less. Note...Wave height forecasts are for ice free areas. $$ LSZ145-160400- Duluth MN to Port Wing WI- 421 PM CDT Sun Mar 15 2026 ...GALE WARNING IN EFFECT THROUGH MONDAY MORNING... ...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH MONDAY MORNING... .TONIGHT...North gales to 35 knots. Chance of snow early in the evening. Slight chance of snow in the late evening and early morning. Heavy freezing spray through the night. Waves 7 to 12 feet. Waves occasionally to 15 feet. .MONDAY...North wind up to 30 knots. Gusts up to 35 knots decreasing to 30 knots in the afternoon. Heavy freezing spray. Waves 7 to 10 feet subsiding to 4 to 7 feet in the afternoon. Waves occasionally to 14 feet. .MONDAY NIGHT...Northwest wind 20 to 25 knots easing to 10 to 15 knots with gusts to around 20 knots after midnight. Partly cloudy. Waves 4 to 6 feet subsiding to 1 to 3 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. .TUESDAY...Northwest wind 5 to 10 knots becoming southwest late in the afternoon. Mostly sunny. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ146-160400- Port Wing to Sand Island WI- 421 PM CDT Sun Mar 15 2026 ...GALE WARNING IN EFFECT THROUGH MONDAY MORNING... ...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH MONDAY MORNING... .TONIGHT...North wind up to 30 knots with gales to around 35 knots rising to gales to 35 knots late in the evening, then easing to up to 30 knots with gales to around 35 knots after midnight rising to gales to 35 knots with gales to around 40 knots late in the night. Chance of snow in the evening. Slight chance of snow after midnight. Heavy freezing spray through the night. Waves 8 to 13 feet. Waves occasionally to 16 feet. .MONDAY...North wind up to 30 knots. Gusts up to 35 knots decreasing to 30 knots in the afternoon. Heavy freezing spray. Waves 8 to 13 feet subsiding to 7 to 10 feet in the afternoon. Waves occasionally to 16 feet. .MONDAY NIGHT...Northwest wind 20 to 25 knots easing to 10 to 15 knots with gusts to around 20 knots after midnight. Heavy freezing spray in the evening. Waves 4 to 7 feet subsiding to 3 to 5 feet after midnight. Waves occasionally to 9 feet. A small craft advisory may be needed. .TUESDAY...Northwest wind 5 to 10 knots becoming southwest in the afternoon. Partly sunny. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ147-160400- Sand Island to Bayfield WI- 421 PM CDT Sun Mar 15 2026 ...GALE WARNING IN EFFECT THROUGH MONDAY AFTERNOON... ...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...North wind up to 30 knots rising to gales to 35 knots late in the night. Gales up to 40 knots. Heavy freezing spray through the night. Chance of snow in the evening. Slight chance of snow after midnight. Waves 8 to 13 feet. Waves occasionally to 17 feet. .MONDAY...North wind up to 30 knots. Gusts up to 35 knots decreasing to 30 knots in the afternoon. Slight chance of snow in the morning. Heavy freezing spray through the day. Waves 8 to 13 feet subsiding to 7 to 10 feet in the afternoon. Waves occasionally to 17 feet. .MONDAY NIGHT...North wind 15 to 20 knots. Gusts up to 30 knots decreasing to 20 knots. Heavy freezing spray in the evening. Waves 5 to 8 feet subsiding to 4 to 6 feet after midnight. Waves occasionally to 10 feet. A small craft advisory may be needed. .TUESDAY...Northwest wind 5 to 10 knots becoming southwest late in the afternoon. Partly sunny. Waves 1 to 3 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ150-160400- Outer Apostle Islands Beyond 5 NM from Mainland- 421 PM CDT Sun Mar 15 2026 ...GALE WARNING IN EFFECT THROUGH MONDAY AFTERNOON... ...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...North gales to 35 knots. Gales up to 45 knots decreasing to 40 knots after midnight. Heavy freezing spray through the night. Chance of snow until early morning. Slight chance of snow late in the night. Waves 12 to 17 feet. Waves occasionally to 22 feet. .MONDAY...North gales to 35 knots with gales to around 40 knots easing to up to 30 knots with gales to around 40 knots in the late morning and afternoon. Slight chance of snow in the morning. Heavy freezing spray through the day. Waves 12 to 17 feet subsiding to 8 to 11 feet. Waves occasionally to 22 feet. .MONDAY NIGHT...North wind 20 to 25 knots with gusts to around 30 knots easing to 10 to 15 knots with gusts to around 20 knots early in the morning. Heavy freezing spray in the evening. Waves 7 to 10 feet subsiding to 4 to 7 feet after midnight. Waves occasionally to 13 feet. A small craft advisory may be needed. .TUESDAY...Northwest wind 10 to 15 knots becoming west 5 knots early in the afternoon, then becoming southwest late in the afternoon. Partly sunny. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late morning and afternoon. Note...Wave height forecasts are for ice free areas. $$ LSZ148-160400- Oak Point to Saxon Harbor WI- 421 PM CDT Sun Mar 15 2026 ...GALE WARNING IN EFFECT THROUGH MONDAY AFTERNOON... ...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH MONDAY AFTERNOON... .TONIGHT...North gales to 40 knots. Gales up to 45 knots decreasing to 40 knots late in the night. Heavy freezing spray through the night. Snow likely until early morning. Chance of snow late in the night. Waves 12 to 17 feet. Waves occasionally to 22 feet. .MONDAY...North gales to 35 knots with gales to around 40 knots easing to up to 30 knots with gales to around 40 knots in the late morning and afternoon. Heavy freezing spray through the day. Chance of snow in the morning. Slight chance of snow in the afternoon. Waves 11 to 16 feet subsiding to 7 to 10 feet. Waves occasionally to 21 feet. .MONDAY NIGHT...North wind 20 to 25 knots with gusts to around 30 knots becoming northwest 10 to 15 knots with gusts to around 20 knots early in the morning. Heavy freezing spray in the evening. Slight chance of snow through the night. Waves 6 to 9 feet subsiding to 4 to 7 feet after midnight. Waves occasionally to 12 feet. A small craft advisory may be needed. .TUESDAY...Northwest wind 10 to 15 knots becoming west 5 knots early in the afternoon, then becoming southwest late in the afternoon. Partly sunny. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late morning and afternoon. A small craft advisory may be needed. Note...Wave height forecasts are for ice free areas. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH