FZUS53 KDLH 232318 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 618 PM CDT Thu Apr 23 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. LSZ140-241000- Grand Portage to Grand Marais MN- 618 PM CDT Thu Apr 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY EVENING... .REST OF TONIGHT...Northeast wind 20 to 25 knots easing to 10 to 15 knots with gusts to around 20 knots toward daybreak. Rain and chance of thunderstorms. Waves 4 to 6 feet. Waves occasionally to 8 feet. .FRIDAY...Northeast wind 10 to 15 knots with gusts to around 20 knots becoming northwest with gusts to around 20 knots in the late morning and afternoon. Rain and chance of thunderstorms in the morning, then chance of rain in the afternoon. Waves 3 to 5 feet. .FRIDAY NIGHT...Northwest wind 5 to 10 knots. Partly cloudy. Waves 1 to 3 feet. .SATURDAY...Northwest wind 5 to 10 knots becoming southwest in the afternoon. Mostly sunny. Waves 1 to 2 feet. $$ LSZ141-241000- Grand Marais to Taconite Harbor MN- 618 PM CDT Thu Apr 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY EVENING... .REST OF TONIGHT...East wind 20 to 25 knots becoming northeast 10 to 15 knots with gusts to around 20 knots toward daybreak. Thunderstorms likely in the evening. Rain through the night. Chance of thunderstorms after midnight. Waves 4 to 6 feet. Waves occasionally to 7 feet. .FRIDAY...North wind 10 knots with gusts to around 20 knots becoming west with gusts to around 20 knots in the late morning and afternoon. Chance of rain and slight chance of thunderstorms in the morning, then slight chance of rain in the afternoon. Waves 2 to 4 feet. .FRIDAY NIGHT...Northwest wind 5 knots. Mostly clear. Waves 1 to 3 feet. .SATURDAY...Northwest wind 5 knots becoming south in the afternoon. Mostly sunny. Waves 1 to 2 feet. $$ LSZ142-241000- Taconite Harbor to Silver Bay Harbor MN- 618 PM CDT Thu Apr 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY EVENING... .REST OF TONIGHT...Northeast wind 15 to 20 knots becoming north 5 to 10 knots toward daybreak. Rain with thunderstorms likely in the evening, then rain likely and chance of thunderstorms after midnight. Waves 2 to 4 feet. .FRIDAY...Northwest wind 5 to 10 knots with gusts to around 20 knots becoming west in the afternoon. Chance of rain in the morning. Waves 1 to 3 feet. .FRIDAY NIGHT...Northwest wind 5 knots becoming north after midnight. Mostly clear. Waves 1 to 2 feet. .SATURDAY...Northwest wind 5 knots becoming southwest late in the morning, then becoming southeast in the afternoon. Mostly sunny. Waves 1 foot or less. $$ LSZ143-241000- Silver Bay Harbor to Two Harbors MN- 618 PM CDT Thu Apr 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY EVENING... .REST OF TONIGHT...Northeast wind 20 to 25 knots easing to 10 to 15 knots with gusts to around 20 knots after midnight, then becoming northwest 5 to 10 knots toward daybreak. Rain in the evening. Chance of thunderstorms through the night. Rain likely after midnight. Waves 3 to 5 feet. Waves occasionally to 7 feet. .FRIDAY...West wind 5 to 10 knots. Gusts up to 20 knots early in the morning. Chance of rain in the morning. Waves 1 to 3 feet. .FRIDAY NIGHT...West wind 5 knots becoming north in the late evening and overnight. Mostly clear. Waves 1 to 2 feet. .SATURDAY...North wind 5 knots becoming east in the late morning and afternoon. Mostly sunny. Waves 1 foot or less. $$ LSZ144-241000- Two Harbors to Duluth MN- 618 PM CDT Thu Apr 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING... .REST OF TONIGHT...Northeast wind 20 to 25 knots easing to 10 to 15 knots with gusts to around 20 knots after midnight, then becoming west with gusts to around 20 knots toward daybreak. Rain in the evening. Chance of thunderstorms through the night. Rain likely after midnight. Waves 3 to 5 feet subsiding to 1 to 3 feet toward daybreak. .FRIDAY...West wind 10 to 15 knots. Gusts up to 20 knots in the morning. Chance of rain in the morning. Waves 1 to 3 feet. .FRIDAY NIGHT...West wind 5 to 10 knots becoming north in the late evening and overnight. Mostly clear. Waves 1 foot or less. .SATURDAY...North wind 5 knots becoming east in the late morning and afternoon. Mostly sunny. Waves 1 foot or less. $$ LSZ145-241000- Duluth MN to Port Wing WI- 618 PM CDT Thu Apr 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING... .REST OF TONIGHT...Northeast wind 15 to 20 knots becoming north 10 to 15 knots after midnight, then becoming west 5 to 10 knots with gusts to around 20 knots toward daybreak. Rain in the evening. Chance of thunderstorms through the night. Rain likely after midnight. Waves 2 to 4 feet subsiding to 1 to 3 feet toward daybreak. .FRIDAY...West wind 10 to 15 knots with gusts to around 20 knots easing to 5 to 10 knots in the afternoon. Chance of rain in the morning. Waves 1 to 3 feet. .FRIDAY NIGHT...West wind 5 to 10 knots becoming north after midnight. Mostly clear. Waves 1 foot or less. .SATURDAY...Northeast wind 5 knots becoming east late in the afternoon. Mostly sunny. Waves 1 foot or less. $$ LSZ146-241000- Port Wing to Sand Island WI- 618 PM CDT Thu Apr 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING... .REST OF TONIGHT...East wind 10 to 15 knots with gusts to around 20 knots becoming northeast after midnight, then becoming west 5 to 10 knots toward daybreak. Rain in the evening. Chance of thunderstorms through the night. Rain likely after midnight. Waves 2 to 4 feet subsiding to 1 to 3 feet toward daybreak. .FRIDAY...West wind 10 to 15 knots becoming southwest late in the afternoon. Chance of rain in the morning. Waves 1 to 2 feet. .FRIDAY NIGHT...West wind 5 to 10 knots becoming north in the late evening and overnight. Mostly clear. Waves 1 to 2 feet. .SATURDAY...North wind 5 knots becoming northeast in the afternoon. Mostly sunny. Waves 1 foot or less. $$ LSZ147-241000- Sand Island to Bayfield WI- 618 PM CDT Thu Apr 23 2026 .REST OF TONIGHT...East wind 10 to 15 knots becoming west toward daybreak. Rain with thunderstorms likely in the evening, then rain likely and chance of thunderstorms after midnight. Waves 1 to 3 feet. .FRIDAY...West wind 10 to 15 knots. Gusts up to 20 knots in the morning. Rain likely and slight chance of thunderstorms in the morning. Waves 1 to 2 feet. .FRIDAY NIGHT...West wind 5 knots becoming north in the late evening and overnight. Mostly clear. Waves 1 to 2 feet. .SATURDAY...Northwest wind 5 knots early in the morning becoming variable 10 knots or less, then becoming east 5 knots in the afternoon. Mostly sunny. Waves 1 foot or less. $$ LSZ150-241000- Outer Apostle Islands Beyond 5 NM from Mainland- 618 PM CDT Thu Apr 23 2026 .REST OF TONIGHT...East wind 15 to 20 knots becoming southwest 10 to 15 knots toward daybreak. Thunderstorms likely in the evening. Rain through the night. Chance of thunderstorms after midnight. Waves 2 to 4 feet. .FRIDAY...West wind 10 to 15 knots. Gusts up to 20 knots until late afternoon. Rain likely and slight chance of thunderstorms in the morning. Waves 1 to 3 feet. .FRIDAY NIGHT...West wind 5 to 10 knots becoming north in the late evening and overnight. Mostly clear. Waves 1 to 2 feet. .SATURDAY...Northwest wind 5 knots becoming east in the afternoon. Mostly sunny. Waves 1 foot or less. $$ LSZ121-241000- Chequamegon Bay-Bayfield to Oak Point WI- 618 PM CDT Thu Apr 23 2026 .REST OF TONIGHT...Southeast wind 5 to 10 knots with gusts to around 20 knots becoming west toward daybreak. Rain and chance of thunderstorms. Waves 1 to 2 feet. .FRIDAY...West wind 5 to 10 knots. Rain likely and slight chance of thunderstorms in the morning. Waves 1 foot or less. .FRIDAY NIGHT...West wind 5 knots becoming north in the late evening and overnight. Mostly clear. Waves 1 foot or less. .SATURDAY...Northwest wind 5 knots becoming northeast in the late morning and afternoon. Mostly sunny. Waves 1 foot or less. $$ LSZ148-241000- Oak Point to Saxon Harbor WI- 618 PM CDT Thu Apr 23 2026 .REST OF TONIGHT...Southeast wind 10 to 15 knots with gusts to around 20 knots becoming west 5 to 10 knots toward daybreak. Rain and chance of thunderstorms. Waves 1 to 3 feet. .FRIDAY...West wind 5 to 10 knots. Rain likely and slight chance of thunderstorms in the morning. Waves 1 to 2 feet. .FRIDAY NIGHT...West wind 5 knots becoming north in the late evening and overnight. Mostly clear. Waves 1 foot or less. .SATURDAY...Northwest wind 5 knots becoming northeast late in the afternoon. Mostly sunny. Waves 1 foot or less. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH