FZUS53 KDLH 310927 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 427 AM CDT Sun May 31 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. LSZ140-311600- Grand Portage to Grand Marais MN- 427 AM CDT Sun May 31 2026 .TODAY...East wind 5 knots becoming southwest in the afternoon. Sunny. Waves 1 foot or less. .TONIGHT...Southwest wind 5 knots becoming south late in the evening, then becoming southwest after midnight becoming north early in the morning. Partly cloudy. Waves 1 foot or less. .MONDAY...Northeast wind 15 to 20 knots. Gusts up to 25 knots. Sunny. Waves 1 to 2 feet building to 2 to 4 feet in the afternoon. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the evening. Clear. Waves 1 to 3 feet subsiding to 1 to 2 feet in the late evening and overnight. $$ LSZ141-311600- Grand Marais to Taconite Harbor MN- 427 AM CDT Sun May 31 2026 .TODAY...East wind 5 knots becoming southeast early in the afternoon, then becoming variable 10 knots or less late in the afternoon. Mostly sunny. Waves 1 to 2 feet. .TONIGHT...South wind 5 knots becoming southeast late in the evening, then becoming variable 10 knots or less after midnight becoming northwest 5 knots early in the morning. Partly cloudy. Waves 1 foot or less. .MONDAY...East wind 10 to 15 knots. Gusts up to 20 knots in the afternoon. Sunny. Waves 1 to 2 feet building to 1 to 3 feet in the afternoon. .MONDAY NIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots early in the morning. Mostly clear. Waves 1 to 3 feet. $$ LSZ142-311600- Taconite Harbor to Silver Bay Harbor MN- 427 AM CDT Sun May 31 2026 .TODAY...Northeast wind 5 knots until late afternoon becoming variable 10 knots or less. Mostly sunny. Waves 1 to 2 feet. .TONIGHT...Variable winds 10 knots or less becoming north 5 knots late in the evening, then becoming variable 10 knots or less after midnight becoming north 5 knots early in the morning. Partly cloudy. Waves 1 foot or less. .MONDAY...Northeast wind 5 to 10 knots. Mostly sunny. Waves 1 to 3 feet. .MONDAY NIGHT...Northeast wind 5 to 10 knots. Mostly clear. Waves 1 to 3 feet. $$ LSZ143-311600- Silver Bay Harbor to Two Harbors MN- 427 AM CDT Sun May 31 2026 .TODAY...Northeast wind 5 to 10 knots. Partly sunny. Waves 1 to 2 feet. .TONIGHT...Northeast wind 5 to 10 knots becoming north early in the morning. Partly cloudy. Waves 1 foot or less. .MONDAY...Northeast wind 10 to 15 knots with gusts to around 20 knots. Mostly sunny. Waves 1 to 2 feet. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the evening. Mostly clear. Waves 1 to 3 feet. $$ LSZ144-311600- Two Harbors to Duluth MN- 427 AM CDT Sun May 31 2026 .TODAY...Northeast wind 5 to 10 knots. Partly sunny. Waves 1 to 2 feet. .TONIGHT...Northeast wind 5 to 10 knots. Mostly cloudy. Waves 1 foot or less. .MONDAY...Northeast wind 10 to 15 knots. Gusts up to 25 knots. Mostly sunny. Waves 1 to 2 feet building to 1 to 3 feet late in the afternoon. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 25 knots. Mostly clear. Waves 1 to 3 feet. $$ LSZ145-311600- Duluth MN to Port Wing WI- 427 AM CDT Sun May 31 2026 .TODAY...Northeast wind 5 to 10 knots. Partly sunny. Waves 1 to 2 feet. .TONIGHT...Northeast wind 5 to 10 knots becoming east early in the morning. Mostly cloudy. Waves 1 foot or less. .MONDAY...Northeast wind 10 to 15 knots. Gusts up to 25 knots. Mostly sunny. Waves 1 to 2 feet building to 1 to 3 feet late in the afternoon. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 25 knots. Mostly clear. Waves 1 to 3 feet. $$ LSZ146-311600- Port Wing to Sand Island WI- 427 AM CDT Sun May 31 2026 .TODAY...Northeast wind 5 to 10 knots. Partly sunny. Waves 1 to 2 feet. .TONIGHT...Northeast wind 5 to 10 knots. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 foot or less. .MONDAY...Northeast wind 10 to 15 knots with gusts to around 20 knots. Mostly sunny. Waves 1 to 2 feet. .MONDAY NIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots early in the morning. Mostly clear. Waves 1 to 3 feet. $$ LSZ147-311600- Sand Island to Bayfield WI- 427 AM CDT Sun May 31 2026 .TODAY...Northeast wind 5 knots. Mostly sunny. Waves 1 to 2 feet. .TONIGHT...East wind 5 knots becoming north after midnight. Partly cloudy. Waves 1 foot or less. .MONDAY...Northeast wind 5 to 10 knots. Mostly sunny. Waves 1 to 3 feet. .MONDAY NIGHT...Northeast wind 5 to 10 knots. Mostly clear. Waves 1 to 3 feet. $$ LSZ150-311600- Outer Apostle Islands Beyond 5 NM from Mainland- 427 AM CDT Sun May 31 2026 .TODAY...East wind 5 to 10 knots. Mostly sunny. Waves 1 to 2 feet. .TONIGHT...East wind 5 knots becoming north after midnight. Partly cloudy. Waves 1 foot or less. .MONDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the afternoon. Mostly sunny. Waves 1 to 3 feet building to 2 to 4 feet late in the afternoon. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the evening. Mostly clear. Waves 2 to 4 feet subsiding to 1 to 2 feet early in the morning. A small craft advisory may be needed. $$ LSZ121-311600- Chequamegon Bay-Bayfield to Oak Point WI- 427 AM CDT Sun May 31 2026 .TODAY...East wind 5 to 10 knots. Mostly sunny. Waves 1 to 2 feet. .TONIGHT...Northeast wind 5 knots in the evening becoming variable 10 knots or less. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 foot or less. .MONDAY...Northeast wind 10 to 15 knots. Mostly sunny. Waves 1 to 2 feet building to 2 to 4 feet late in the afternoon. .MONDAY NIGHT...Northeast wind 10 to 15 knots until early morning becoming variable 10 knots or less. Mostly clear. Waves 2 to 4 feet subsiding to 1 foot or less. $$ LSZ148-311600- Oak Point to Saxon Harbor WI- 427 AM CDT Sun May 31 2026 .TODAY...Northeast wind 5 to 10 knots. Mostly sunny. Waves 1 to 2 feet. .TONIGHT...Northeast wind 5 knots becoming northwest after midnight. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 foot or less. .MONDAY...Northeast wind 10 to 15 knots. Mostly sunny. Waves 1 to 2 feet building to 2 to 4 feet late in the afternoon. .MONDAY NIGHT...Northeast wind 10 to 15 knots easing to 5 knots early in the morning. Mostly clear. Waves 2 to 4 feet subsiding to 1 to 2 feet early in the morning. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH