FZUS53 KDLH 201353 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 853 AM 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. LSZ140-202200- Grand Portage to Grand Marais MN- 853 AM CDT Mon Apr 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM NOON CDT TODAY THROUGH THIS EVENING... .REST OF TODAY...Southwest wind 5 to 10 knots rising to 15 to 20 knots with gusts to around 25 knots in the late morning and afternoon. Mostly sunny early in the morning then becoming mostly cloudy. Waves 1 to 2 feet building to 2 to 4 feet in the afternoon. .TONIGHT...Southwest wind 15 to 20 knots with gusts to around 30 knots becoming west 5 to 10 knots early in the morning. Partly cloudy. Waves 2 to 4 feet. .TUESDAY...West wind 5 to 10 knots becoming southwest late in the afternoon. Sunny. Waves 1 to 2 feet. .TUESDAY NIGHT...Southwest wind 5 to 10 knots becoming northeast early in the morning. Mostly clear. Waves 1 foot or less. $$ LSZ141-202200- Grand Marais to Taconite Harbor MN- 853 AM CDT Mon Apr 20 2026 .REST OF TODAY...Southwest wind 10 to 15 knots with gusts to around 20 knots. Mostly sunny early in the morning then becoming partly sunny. Waves 1 to 2 feet. .TONIGHT...Southwest wind 10 to 15 knots with gusts to around 20 knots becoming west 5 to 10 knots after midnight. Mostly clear. Waves 1 to 2 feet. .TUESDAY...West wind 5 to 10 knots. Sunny. Waves 1 to 2 feet. .TUESDAY NIGHT...Southwest wind 5 knots early in the evening becoming variable 10 knots or less, then becoming northeast 5 knots after midnight. Mostly clear. Waves 1 foot or less. $$ LSZ142-202200- Taconite Harbor to Silver Bay Harbor MN- 853 AM CDT Mon Apr 20 2026 .REST OF TODAY...South wind 5 to 10 knots. Mostly sunny early in the morning then becoming partly sunny. Waves 1 foot or less. .TONIGHT...Southwest wind 5 to 10 knots with gusts to around 20 knots becoming west early in the morning. Mostly clear. Waves 1 to 2 feet. .TUESDAY...West wind 5 knots becoming southwest in the afternoon. Sunny. Waves 1 foot or less. .TUESDAY NIGHT...Southwest 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. $$ LSZ143-202200- Silver Bay Harbor to Two Harbors MN- 853 AM CDT Mon Apr 20 2026 .REST OF TODAY...Southwest wind 10 to 15 knots with gusts to around 20 knots. Mostly sunny early in the morning then becoming partly sunny. Waves 1 to 3 feet. .TONIGHT...Southwest wind 10 to 15 knots with gusts to around 20 knots becoming west 5 knots early in the morning. Mostly clear. Waves 1 to 3 feet. .TUESDAY...West wind 5 knots becoming southwest in the afternoon. Sunny. Waves 1 foot or less. .TUESDAY NIGHT...South wind 5 knots becoming northeast in the late evening and overnight. Mostly clear. Waves 1 foot or less. $$ LSZ144-202200- Two Harbors to Duluth MN- 853 AM CDT Mon Apr 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM CDT THIS EVENING... .REST OF TODAY...Southwest wind 15 to 20 knots with gusts to around 25 knots. Partly sunny. Waves 1 to 2 feet building to 1 to 3 feet late. .TONIGHT...Southwest wind 15 to 20 knots with gusts to around 30 knots easing to 5 to 10 knots after midnight. Mostly clear. Waves 1 to 3 feet. .TUESDAY...North wind 5 knots becoming southwest early in the afternoon, then becoming south late in the afternoon. Sunny. Waves 1 foot or less. .TUESDAY NIGHT...Northeast wind 5 knots. Clear. Waves 1 foot or less. $$ LSZ145-202200- Duluth MN to Port Wing WI- 853 AM CDT Mon Apr 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM CDT THIS EVENING... .REST OF TODAY...Southwest wind 15 to 20 knots with gusts to around 30 knots. Partly sunny. Waves 1 to 3 feet. .TONIGHT...Southwest wind 15 to 20 knots with gusts to around 30 knots easing to 5 to 10 knots after midnight. Mostly clear. Waves 1 to 3 feet. .TUESDAY...Northwest wind 5 knots becoming southwest late in the afternoon. Sunny. Waves 1 foot or less. .TUESDAY NIGHT...East wind 5 knots. Mostly clear. Waves 1 foot or less. $$ LSZ146-202200- Port Wing to Sand Island WI- 853 AM CDT Mon Apr 20 2026 .REST OF TODAY...Southwest wind 10 to 15 knots with gusts to around 20 knots. Partly sunny. Waves 1 to 2 feet. .TONIGHT...Southwest wind 10 to 15 knots. Gusts up to 25 knots. Mostly clear. Waves 1 to 3 feet. .TUESDAY...Northwest wind 5 knots becoming southwest in the afternoon. Sunny. Waves 1 foot or less. .TUESDAY NIGHT...Southeast wind 5 knots becoming east after midnight. Mostly clear. Waves 1 foot or less. $$ LSZ147-202200- Sand Island to Bayfield WI- 853 AM CDT Mon Apr 20 2026 .REST OF TODAY...South wind 5 to 10 knots. Gusts up to 20 knots late. Partly sunny. Waves 1 foot or less. .TONIGHT...Southwest wind 5 to 10 knots with gusts to around 20 knots becoming west early in the morning. Mostly clear. Waves 1 to 2 feet. .TUESDAY...Northwest wind 5 knots becoming south late in the afternoon. Sunny. Waves 1 foot or less. .TUESDAY NIGHT...Southeast wind 5 knots in the evening becoming variable 10 knots or less, then becoming southeast 5 knots early in the morning. Mostly clear. Waves 1 foot or less. $$ LSZ150-202200- Outer Apostle Islands Beyond 5 NM from Mainland- 853 AM CDT Mon Apr 20 2026 .REST OF TODAY...South wind 10 to 15 knots with gusts to around 20 knots. Partly sunny. Waves 1 to 2 feet. .TONIGHT...Southwest wind 10 to 15 knots with gusts to around 25 knots becoming west 5 to 10 knots early in the morning. Mostly clear. Waves 1 to 3 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. $$ LSZ121-202200- Chequamegon Bay-Bayfield to Oak Point WI- 853 AM CDT Mon Apr 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM CDT THIS EVENING... .REST OF TODAY...Southwest wind 10 to 15 knots with gusts to around 25 knots. Partly sunny. Waves 1 foot or less. .TONIGHT...Southwest wind 10 to 15 knots with gusts to around 25 knots becoming west 5 to 10 knots early in the morning. Mostly clear. Waves 1 foot or less. .TUESDAY...Northwest wind 5 knots becoming east late in the afternoon. Sunny. Waves 1 foot or less. .TUESDAY NIGHT...Southeast wind 5 knots in the evening becoming variable 10 knots or less, then becoming south 5 knots early in the morning. Clear. Waves 1 foot or less. $$ LSZ148-202200- Oak Point to Saxon Harbor WI- 853 AM CDT Mon Apr 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM CDT THIS EVENING... .REST OF TODAY...Southwest wind 15 to 20 knots. Mostly sunny early in the morning then becoming partly sunny. Waves 1 to 2 feet. .TONIGHT...Southwest 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 2 feet. .TUESDAY...Northwest wind 5 knots becoming north in the late morning and early afternoon, then becoming east late in the afternoon. Sunny. Waves 1 foot or less. .TUESDAY NIGHT...Southeast wind 5 knots becoming south early in the morning. Clear. Waves 1 foot or less. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH