Nearshore Marine Forecast
Issued by NWS Duluth, MN
Issued by NWS Duluth, MN
280 FZUS53 KDLH 040820 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 320 AM CDT Sat Oct 4 2025 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. LSZ140-041615- Grand Portage to Grand Marais MN- 320 AM CDT Sat Oct 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH SUNDAY MORNING... ...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... .TODAY...South wind 10 to 15 knots. Gusts up to 20 knots in the late morning and afternoon. Patchy fog until late afternoon. Waves 1 to 3 feet. .TONIGHT...Southwest wind 15 to 20 knots. Gusts up to 20 knots increasing to 30 knots. Partly cloudy. Waves 1 to 3 feet building to 2 to 4 feet in the late evening and overnight. .SUNDAY...Southwest wind 20 to 25 knots. Gusts up to 30 knots increasing to 45 knots. Slight chance of rain showers in the afternoon. Waves 5 to 8 feet. Waves occasionally to 10 feet. A gale warning may be needed. .SUNDAY NIGHT...Southwest wind 20 to 25 knots with gales to around 45 knots becoming west with gales to around 35 knots in the late evening and early morning, then becoming northwest 10 to 15 knots with gusts to around 25 knots early in the morning. Chance of rain showers through the night. Waves 5 to 8 feet subsiding to 2 to 4 feet. Waves occasionally to 10 feet. A gale warning may be needed. $$ LSZ141-041615- Grand Marais to Taconite Harbor MN- 320 AM CDT Sat Oct 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH SUNDAY MORNING... ...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... .TODAY...Southeast wind 5 to 10 knots. Areas of dense fog early in the morning, then patchy fog in the late morning and early afternoon. Waves 1 to 2 feet. .TONIGHT...Southeast wind 5 to 10 knots with gusts to around 20 knots becoming south with gusts to around 20 knots after midnight. Partly cloudy. Waves 1 to 3 feet. .SUNDAY...South wind 15 to 20 knots. Gusts up to 25 knots increasing to 35 knots. Chance of showers in the afternoon. Waves 4 to 6 feet. Waves occasionally to 8 feet. A gale warning may be needed. .SUNDAY NIGHT...Southwest wind 20 to 25 knots with gales to around 35 knots becoming northwest 15 to 20 knots with gusts to around 30 knots in the late evening and overnight. Chance of rain showers through the night. Waves 4 to 6 feet subsiding to 1 to 2 feet early in the morning. Waves occasionally to 8 feet. A gale warning may be needed. $$ LSZ142-041615- Taconite Harbor to Silver Bay Harbor MN- 320 AM CDT Sat Oct 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH SUNDAY MORNING... ...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... .TODAY...East wind 5 knots becoming southeast in the late morning and afternoon. Patchy fog through the day. Waves 1 foot or less. .TONIGHT...Southeast wind 5 to 10 knots with gusts to around 20 knots becoming south with gusts to around 25 knots after midnight. Partly cloudy. Waves 1 to 3 feet. .SUNDAY...South wind 15 to 20 knots. Gusts up to 25 knots increasing to 35 knots. Chance of showers in the afternoon. Waves 3 to 5 feet. A gale warning may be needed. .SUNDAY NIGHT...Southwest wind 15 to 20 knots with gales to around 35 knots becoming northwest 10 to 15 knots with gusts to around 30 knots in the late evening and overnight. Chance of rain showers in the evening. Waves 3 to 5 feet subsiding to 1 to 2 feet after midnight. A gale warning may be needed. $$ LSZ143-041615- Silver Bay Harbor to Two Harbors MN- 320 AM CDT Sat Oct 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH SUNDAY MORNING... ...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... .TODAY...East wind 5 knots becoming southeast with gusts to around 20 knots in the late morning and afternoon. Patchy fog early in the morning. Waves 1 foot or less. .TONIGHT...South wind 10 to 15 knots with gusts to around 25 knots becoming southwest with gusts to around 25 knots early in the morning. Partly cloudy. Waves 1 to 3 feet. .SUNDAY...Southwest wind 15 to 20 knots. Gusts up to 25 knots increasing to 35 knots. Chance of showers in the afternoon. Waves 3 to 5 feet. Waves occasionally to 7 feet. A gale warning may be needed. .SUNDAY NIGHT...West wind 15 to 20 knots with gales to around 35 knots becoming northwest 10 to 15 knots with gusts to around 25 knots after midnight. Chance of rain showers in the evening. Waves 3 to 5 feet subsiding to 1 to 2 feet after midnight. A gale warning may be needed. $$ LSZ144-041615- Two Harbors to Duluth MN- 320 AM CDT Sat Oct 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT THIS MORNING THROUGH SUNDAY MORNING... ...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... .TODAY...Southeast wind 5 to 10 knots becoming south 10 to 15 knots with gusts to around 25 knots in the late morning and afternoon. Patchy fog early in the morning. Waves 1 to 2 feet. .TONIGHT...South wind 15 to 20 knots. Gusts up to 20 knots increasing to 25 knots in the late evening and overnight. Partly cloudy. Waves 1 to 3 feet. .SUNDAY...South wind 20 to 25 knots. Gusts up to 25 knots increasing to 35 knots. Chance of showers in the afternoon. Waves 3 to 5 feet. Waves occasionally to 7 feet. A gale warning may be needed. .SUNDAY NIGHT...West wind 20 to 25 knots with gales to around 35 knots becoming northwest 15 to 20 knots with gusts to around 25 knots after midnight. Chance of rain showers in the evening. Waves 3 to 5 feet subsiding to 1 to 2 feet after midnight. A gale warning may be needed. $$ LSZ145-041615- Duluth MN to Port Wing WI- 320 AM CDT Sat Oct 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT THIS MORNING THROUGH SUNDAY MORNING... ...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... .TODAY...South wind 10 to 15 knots with gusts to around 25 knots rising to 15 to 20 knots with gusts to around 25 knots in the afternoon. Patchy fog early in the morning. Waves 1 to 2 feet. .TONIGHT...South wind 15 to 20 knots. Gusts up to 25 knots increasing to 30 knots in the late evening and overnight. Partly cloudy. Waves 1 to 3 feet. .SUNDAY...South wind 20 to 25 knots. Gusts up to 30 knots increasing to 35 knots in the afternoon. Chance of showers and slight chance of thunderstorms in the afternoon. Waves 1 to 3 feet building to 2 to 4 feet in the late morning and afternoon. A gale warning may be needed. .SUNDAY NIGHT...West wind 20 to 25 knots with gales to around 35 knots becoming northwest 15 to 20 knots with gusts to around 25 knots after midnight. Chance of rain showers and slight chance of thunderstorms in the evening. Waves 2 to 4 feet subsiding to 1 to 2 feet early in the morning. A gale warning may be needed. $$ LSZ146-041615- Port Wing to Sand Island WI- 320 AM CDT Sat Oct 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT THIS MORNING THROUGH SUNDAY MORNING... ...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... .TODAY...South wind 10 to 15 knots. Gusts up to 25 knots. Patchy fog early in the morning. Waves 1 to 2 feet. .TONIGHT...South wind 15 to 20 knots becoming southwest 5 to 15 knots early in the morning. Gusts up to 20 knots increasing to 25 knots late in the evening, then increasing to 30 knots after midnight decreasing to 25 knots early in the morning. Partly cloudy. Waves 1 to 3 feet. .SUNDAY...South wind 15 to 20 knots. Gusts up to 30 knots increasing to 35 knots in the afternoon. Chance of showers and slight chance of thunderstorms in the afternoon. Waves 1 to 3 feet building to 2 to 4 feet in the late morning and afternoon. A gale warning may be needed. .SUNDAY NIGHT...Southwest wind 15 to 20 knots with gales to around 35 knots becoming west with gusts to around 30 knots in the late evening and early morning, then becoming northwest 10 knots with gusts to around 20 knots early in the morning. Slight chance of thunderstorms in the evening. Chance of rain showers through the night. Waves 2 to 4 feet subsiding to 1 to 2 feet early in the morning. A gale warning may be needed. $$ LSZ147-041615- Sand Island to Bayfield WI- 320 AM CDT Sat Oct 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT THIS MORNING THROUGH SUNDAY MORNING... ...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... .TODAY...South wind 10 to 15 knots. Gusts up to 25 knots. Mostly sunny. Waves 1 to 2 feet. .TONIGHT...South wind 10 knots with gusts to around 20 knots rising to 10 to 15 knots with gusts to around 25 knots in the late evening and overnight. Partly cloudy. Waves 1 to 2 feet. .SUNDAY...South wind 5 to 15 knots with gusts to around 30 knots rising to 15 to 20 knots with gales to around 35 knots in the late morning and afternoon. Slight chance of showers and thunderstorms in the afternoon. Waves 1 to 3 feet. A gale warning may be needed. .SUNDAY NIGHT...Southwest wind 5 to 15 knots with gales to around 35 knots becoming west 10 to 15 knots with gusts to around 30 knots in the late evening and overnight. Slight chance of thunderstorms in the evening. Chance of rain showers through the night. Waves 2 to 4 feet subsiding to 1 to 2 feet early in the morning. A gale warning may be needed. $$ LSZ150-041615- Outer Apostle Islands Beyond 5 NM from Mainland- 320 AM CDT Sat Oct 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT THIS MORNING THROUGH SUNDAY MORNING... ...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... .TODAY...South wind 10 to 15 knots. Gusts up to 20 knots increasing to 25 knots in the afternoon. Sunny. Waves 1 to 3 feet. .TONIGHT...South wind 15 to 20 knots. Gusts up to 20 knots increasing to 30 knots. Partly cloudy. Waves 3 to 5 feet. .SUNDAY...South wind 15 to 20 knots. Gusts up to 30 knots increasing to 35 knots late in the afternoon. Slight chance of showers and thunderstorms in the afternoon. Waves 3 to 5 feet. Waves occasionally to 7 feet. A gale warning may be needed. .SUNDAY NIGHT...Southwest wind 15 to 20 knots with gales to around 35 knots becoming west with gusts to around 30 knots in the late evening and overnight. Slight chance of thunderstorms in the evening. Chance of rain showers through the night. Waves 3 to 5 feet. A gale warning may be needed. $$ LSZ121-041615- Chequamegon Bay-Bayfield to Oak Point WI- 320 AM CDT Sat Oct 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT THIS MORNING THROUGH SUNDAY MORNING... ...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... .TODAY...South wind 15 to 20 knots with gusts to around 25 knots. Patchy fog early in the morning. Waves 1 to 2 feet. .TONIGHT...South wind 15 to 20 knots. Gusts up to 25 knots increasing to 30 knots in the late evening and overnight. Partly cloudy. Waves 1 to 2 feet. .SUNDAY...South wind 20 to 25 knots. Gusts up to 30 knots increasing to 35 knots in the afternoon. Chance of showers and slight chance of thunderstorms in the afternoon. Waves 1 to 3 feet. A gale warning may be needed. .SUNDAY NIGHT...Southwest wind 15 to 20 knots with gales to around 35 knots becoming west with gusts to around 25 knots in the late evening and early morning, then becoming northwest 5 to 10 knots early in the morning. Slight chance of thunderstorms in the evening. Chance of rain showers through the night. Waves 1 to 3 feet. A gale warning may be needed. $$ LSZ148-041615- Oak Point to Saxon Harbor WI- 320 AM CDT Sat Oct 4 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT THIS MORNING THROUGH SUNDAY MORNING... ...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... .TODAY...South wind 15 to 20 knots. Gusts up to 20 knots increasing to 25 knots in the late morning and afternoon. Sunny. Waves 1 to 2 feet. .TONIGHT...South wind 15 to 20 knots. Gusts up to 25 knots increasing to 30 knots in the late evening and overnight. Partly cloudy. Waves 1 to 3 feet. .SUNDAY...South wind 20 to 25 knots. Gusts up to 30 knots increasing to 35 knots in the afternoon. Chance of showers and slight chance of thunderstorms in the afternoon. Waves 2 to 4 feet. A gale warning may be needed. .SUNDAY NIGHT...Southwest wind 15 to 20 knots with gales to around 35 knots becoming west with gusts to around 25 knots in the late evening and overnight. Slight chance of thunderstorms in the evening. Chance of rain showers through the night. Waves 1 to 3 feet. A gale warning may be needed. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes JDS