FZUS53 KDLH 220443 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 1143 PM CDT Tue Apr 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. LSZ140-221000- Grand Portage to Grand Marais MN- 1143 PM CDT Tue Apr 21 2026 .REST OF TONIGHT...Northwest wind 5 knots becoming northeast toward daybreak. Mostly clear. Waves 1 foot or less. .WEDNESDAY...East wind 5 to 10 knots. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots. Chance of rain and slight chance of thunderstorms after midnight. Waves 1 to 3 feet building to 2 to 4 feet after midnight. .THURSDAY...Northeast wind 15 to 20 knots. Gusts up to 25 knots in the afternoon. Slight chance of rain in the afternoon. Waves 3 to 5 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. $$ LSZ141-221000- Grand Marais to Taconite Harbor MN- 1143 PM CDT Tue Apr 21 2026 .REST OF TONIGHT...Northeast wind 5 knots late in the evening becoming variable 10 knots or less. Mostly clear. Waves 1 foot or less. .WEDNESDAY...East wind 5 to 10 knots. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots. Chance of rain and slight chance of thunderstorms after midnight. Waves 1 to 2 feet building to 2 to 4 feet in the late evening and overnight. .THURSDAY...East wind 15 to 20 knots. Gusts up to 20 knots increasing to 25 knots in the late morning and afternoon. Slight chance of rain in the afternoon. Waves 3 to 5 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. $$ LSZ142-221000- Taconite Harbor to Silver Bay Harbor MN- 1143 PM CDT Tue Apr 21 2026 .REST OF TONIGHT...North wind 5 knots late in the evening becoming variable 10 knots or less. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Variable winds 10 knots or less becoming northeast 5 to 10 knots in the late morning and afternoon. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the late evening and overnight. Slight chance of rain in the evening. Slight chance of thunderstorms through the night. Chance of rain after midnight. Waves 1 to 3 feet building to 2 to 4 feet after midnight. .THURSDAY...Northeast wind 15 to 20 knots. Chance of rain in the afternoon. Waves 3 to 5 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. $$ LSZ143-221000- Silver Bay Harbor to Two Harbors MN- 1143 PM CDT Tue Apr 21 2026 .REST OF TONIGHT...North wind 5 knots becoming northeast toward daybreak. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Northeast wind 10 to 15 knots with gusts to around 20 knots. Sunny. Waves 1 to 2 feet. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots until early morning. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 2 feet building to 1 to 3 feet after midnight. .THURSDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the afternoon. Chance of rain and slight chance of thunderstorms in the afternoon. Waves 2 to 4 feet. A small craft advisory may be needed. $$ LSZ144-221000- Two Harbors to Duluth MN- 1143 PM CDT Tue Apr 21 2026 .REST OF TONIGHT...Northeast wind 5 knots. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Northeast wind 10 to 15 knots with gusts to around 20 knots. Sunny. Waves 1 to 2 feet. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots until early morning. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 3 feet. .THURSDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the late morning and afternoon. Chance of rain and slight chance of thunderstorms in the afternoon. Waves 1 to 3 feet. $$ LSZ145-221000- Duluth MN to Port Wing WI- 1143 PM CDT Tue Apr 21 2026 .REST OF TONIGHT...Northeast wind 5 knots. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Northeast wind 10 to 15 knots. Sunny. Waves 1 to 2 feet. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the evening. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 3 feet. .THURSDAY...Northeast wind 10 to 15 knots. Gusts up to 25 knots. Chance of rain and slight chance of thunderstorms in the afternoon. Waves 1 to 3 feet. $$ LSZ146-221000- Port Wing to Sand Island WI- 1143 PM CDT Tue Apr 21 2026 .REST OF TONIGHT...Northeast wind 5 knots. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Northeast wind 10 to 15 knots. Sunny. Waves 1 to 2 feet. .WEDNESDAY NIGHT...Northeast wind 10 to 15 knots. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 2 feet. .THURSDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the afternoon. Chance of rain and slight chance of thunderstorms in the afternoon. Waves 1 to 2 feet building to 2 to 4 feet late in the afternoon. $$ LSZ147-221000- Sand Island to Bayfield WI- 1143 PM CDT Tue Apr 21 2026 .REST OF TONIGHT...Southeast wind 5 knots becoming east after midnight, then becoming variable 10 knots or less toward daybreak. Mostly clear. Waves 1 foot or less. .WEDNESDAY...East wind 5 knots becoming northeast late in the afternoon. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...Northeast wind 5 to 10 knots becoming east after midnight. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 2 feet. .THURSDAY...East wind 5 to 10 knots. Slight chance of rain in the afternoon. Waves 1 to 3 feet building to 2 to 4 feet late in the afternoon. $$ LSZ150-221000- Outer Apostle Islands Beyond 5 NM from Mainland- 1143 PM CDT Tue Apr 21 2026 .REST OF TONIGHT...South wind 5 knots becoming east after midnight. Mostly clear. Waves 1 foot or less. .WEDNESDAY...East wind 5 knots becoming northeast in the afternoon. Sunny. Waves 1 to 2 feet. .WEDNESDAY NIGHT...East wind 10 to 15 knots becoming southeast 5 to 10 knots after midnight. Slight chance of rain and thunderstorms after midnight. Waves 1 to 2 feet building to 1 to 3 feet in the late evening and overnight. .THURSDAY...East wind 10 to 15 knots with gusts to around 20 knots. Slight chance of rain in the afternoon. Waves 3 to 5 feet. A small craft advisory may be needed. $$ LSZ121-221000- Chequamegon Bay-Bayfield to Oak Point WI- 1143 PM CDT Tue Apr 21 2026 .REST OF TONIGHT...Northwest wind 5 knots late in the evening becoming variable 10 knots or less. Mostly clear. Waves 1 foot or less. .WEDNESDAY...East wind 5 knots becoming northeast late in the afternoon. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...Northeast wind 5 knots becoming southeast after midnight. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 foot or less. .THURSDAY...Southeast wind 5 to 10 knots. Gusts up to 20 knots in the afternoon. Slight chance of rain in the afternoon. Waves 1 foot or less. $$ LSZ148-221000- Oak Point to Saxon Harbor WI- 1143 PM CDT Tue Apr 21 2026 .REST OF TONIGHT...Variable winds 10 knots or less becoming east 5 knots toward daybreak. Mostly clear. Waves 1 foot or less. .WEDNESDAY...East wind 5 knots becoming northeast in the afternoon. Sunny. Waves 1 foot or less. .WEDNESDAY NIGHT...Northeast wind 5 to 10 knots becoming southeast with gusts to around 20 knots after midnight. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 2 feet. .THURSDAY...Southeast wind 10 to 15 knots. Gusts up to 20 knots in the afternoon. Slight chance of rain in the afternoon. Waves 1 to 2 feet. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH