FZUS53 KDLH 210400 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 1100 PM CDT Mon Apr 20 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. LSZ140-211000- Grand Portage to Grand Marais MN- 1100 PM CDT Mon Apr 20 2026 .REST OF TONIGHT...Southwest wind 10 to 15 knots. Gusts up to 20 knots late in the evening. Mostly clear. Waves 1 to 3 feet. .TUESDAY...Northwest wind 5 to 10 knots becoming southwest in the afternoon. Sunny. Waves 1 to 2 feet. .TUESDAY NIGHT...Southwest wind 5 to 10 knots becoming west late in the evening, then becoming northeast after midnight. Mostly clear. Waves 1 foot or less. .WEDNESDAY...East wind 5 to 10 knots. Sunny. Waves 1 foot or less. $$ LSZ141-211000- Grand Marais to Taconite Harbor MN- 1100 PM CDT Mon Apr 20 2026 .REST OF TONIGHT...Southwest wind 5 to 10 knots becoming west toward daybreak. Mostly clear. Waves 1 to 2 feet. .TUESDAY...West wind 5 knots becoming southwest in the afternoon. Sunny. Waves 1 to 2 feet. .TUESDAY NIGHT...Southeast wind 5 knots early in the evening becoming variable 10 knots or less, then becoming northeast 5 knots early in the morning. Mostly clear. Waves 1 foot or less. .WEDNESDAY...East wind 5 to 10 knots. Sunny. Waves 1 foot or less. $$ LSZ142-211000- Taconite Harbor to Silver Bay Harbor MN- 1100 PM CDT Mon Apr 20 2026 .REST OF TONIGHT...Southwest wind 5 to 10 knots becoming west toward daybreak. Clear. Waves 1 to 2 feet. .TUESDAY...Northwest wind 5 knots becoming south in the afternoon. Sunny. Waves 1 foot or less. .TUESDAY NIGHT...Southeast wind 5 knots early in the evening becoming variable 10 knots or less, then becoming northeast 5 knots after midnight. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Northeast wind 5 knots. Sunny. Waves 1 foot or less. $$ LSZ143-211000- Silver Bay Harbor to Two Harbors MN- 1100 PM CDT Mon Apr 20 2026 .REST OF TONIGHT...Southwest wind 5 to 10 knots. Clear. Waves 1 to 2 feet. .TUESDAY...Northwest wind 5 knots becoming northeast late in the morning, then becoming south in the afternoon. Sunny. Waves 1 foot or less. .TUESDAY NIGHT...Southeast wind 5 knots becoming northeast in the late evening and overnight. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Northeast wind 5 to 10 knots. Sunny. Waves 1 foot or less. $$ LSZ144-211000- Two Harbors to Duluth MN- 1100 PM CDT Mon Apr 20 2026 .REST OF TONIGHT...Southwest wind 5 to 10 knots. Clear. Waves 1 to 2 feet. .TUESDAY...Northwest wind 5 knots becoming southeast in the afternoon. Sunny. Waves 1 foot or less. .TUESDAY NIGHT...Northeast wind 5 knots. Mostly clear. Waves 1 foot or less. .WEDNESDAY...East wind 5 to 10 knots. Sunny. Waves 1 foot or less. $$ LSZ145-211000- Duluth MN to Port Wing WI- 1100 PM CDT Mon Apr 20 2026 .REST OF TONIGHT...Southwest wind 5 to 10 knots. Clear. Waves 1 to 2 feet. .TUESDAY...Northwest wind 5 knots becoming east in the afternoon. Sunny. Waves 1 foot or less. .TUESDAY NIGHT...East wind 5 knots. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Northeast wind 5 to 10 knots. Sunny. Waves 1 foot or less. $$ LSZ146-211000- Port Wing to Sand Island WI- 1100 PM CDT Mon Apr 20 2026 .REST OF TONIGHT...Southwest wind 5 to 10 knots. Clear. Waves 1 to 2 feet. .TUESDAY...Northwest wind 5 knots becoming north late in the morning, then becoming southeast in the afternoon. Sunny. Waves 1 foot or less. .TUESDAY NIGHT...Variable winds 10 knots or less becoming east 5 knots in the late evening and overnight. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Northeast wind 5 to 10knots. Sunny. Waves 1 foot or less. $$ LSZ147-211000- Sand Island to Bayfield WI- 1100 PM CDT Mon Apr 20 2026 .REST OF TONIGHT...Southwest wind 5 to 10 knots becoming west toward daybreak. Mostly clear. Waves 1 to 2 feet. .TUESDAY...Northwest wind 5 knots becoming north late in the morning, then becoming south in the afternoon. Sunny. Waves 1 foot or less. .TUESDAY NIGHT...Southeast wind 5 knots. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Southeast wind 5 knots becoming east in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ150-211000- Outer Apostle Islands Beyond 5 NM from Mainland- 1100 PM CDT Mon Apr 20 2026 .REST OF TONIGHT...Southwest wind 10 to 15 knots with gusts to around 20 knots becoming west 5 to 10 knots toward daybreak. Mostly clear. Waves 1 to 2 feet. .TUESDAY...Northwest wind 5 knots becoming south late in the afternoon. Sunny. Waves 1 foot or less. .TUESDAY NIGHT...Southeast wind 5 knots. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Southeast wind 5 knots becoming northeast in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ121-211000- Chequamegon Bay-Bayfield to Oak Point WI- 1100 PM CDT Mon Apr 20 2026 .REST OF TONIGHT...Southwest wind 5 to 10 knots. Gusts up to 20 knots late in the evening. Mostly clear. Waves 1 foot or less. .TUESDAY...Northwest wind 5 knots becoming east in the afternoon. Sunny. Waves 1 foot or less. .TUESDAY NIGHT...East wind 5 knots becoming southeast in the late evening and overnight. Mostly clear. Waves 1 foot or less. .WEDNESDAY...South wind 5 knots becoming east in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ148-211000- Oak Point to Saxon Harbor WI- 1100 PM CDT Mon Apr 20 2026 .REST OF TONIGHT...Southwest wind 10 to 15 knots. Gusts up to 20 knots late in the evening. Mostly clear. Waves 1 to 2 feet. .TUESDAY...West wind 5 knots becoming east late in the afternoon. Sunny. Waves 1 foot or less. .TUESDAY NIGHT...Southeast wind 5 knots becoming south after midnight. Mostly clear. Waves 1 foot or less. .WEDNESDAY...Southeast wind 5 knots becoming east in the afternoon. Sunny. Waves 1 foot or less. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH