FZUS53 KDLH 202248 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 547 PM CDT Wed May 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. LSZ140-210400- Grand Portage to Grand Marais MN- 548 PM CDT Wed May 20 2026 .TONIGHT...Southwest wind 5 to 10 knots becoming west after midnight. Mostly clear. Waves 1 to 2 feet. .THURSDAY...Southeast wind 5 to 10 knots. Sunny. Waves 1 foot or less. .THURSDAY NIGHT...Northeast wind 5 to 10 knots. Partly cloudy. Waves 1 to 2 feet. .FRIDAY...East wind 15 to 20 knots with gusts to around 25 knots. Mostly sunny. Waves 1 to 2 feet building to 1 to 3 feet late in the afternoon. $$ LSZ141-210400- Grand Marais to Taconite Harbor MN- 548 PM CDT Wed May 20 2026 .TONIGHT...Northeast wind 5 knots early in the evening becoming variable 10 knots or less. Mostly clear. Waves 1 foot or less. .THURSDAY...East wind 5 to 10 knots. Sunny. Waves 1 foot or less. .THURSDAY NIGHT...Northeast wind 5 to 10 knots. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 2 feet. .FRIDAY...East wind 15 to 20 knots with gusts to around 25 knots. Mostly sunny. Waves 1 to 2 feet building to 1 to 3 feet late in the afternoon. $$ LSZ142-210400- Taconite Harbor to Silver Bay Harbor MN- 548 PM CDT Wed May 20 2026 .TONIGHT...Northeast wind 5 knots early in the evening becoming variable 10 knots or less. Mostly clear. Waves 1 foot or less. .THURSDAY...Variable winds 10 knots or less becoming east 5 knots in the late morning and afternoon. Mostly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Northeast wind 5 knots. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 foot or less. .FRIDAY...Northeast wind 10 to 15 knots with gusts to around 25 knots. Mostly sunny. Waves 1 to 2 feet building to 1 to 3 feet late in the afternoon. $$ LSZ143-210400- Silver Bay Harbor to Two Harbors MN- 548 PM CDT Wed May 20 2026 .TONIGHT...Northeast wind 5 knots. Mostly clear. Waves 1 foot or less. .THURSDAY...Northeast wind 5 to 10 knots. Mostly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Northeast wind 5 to 10 knots. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 foot or less. .FRIDAY...Northeast wind 15 to 20 knots with gusts to around 25 knots. Mostly sunny. Waves 1 to 3 feet. $$ LSZ144-210400- Two Harbors to Duluth MN- 548 PM CDT Wed May 20 2026 .TONIGHT...Northeast wind 5 to 10 knots. Mostly clear. Waves 1 foot or less. .THURSDAY...Northeast wind 10 to 15 knots with gusts to around 20 knots. Sunny. Waves 1 to 2 feet. .THURSDAY NIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots early in the morning. Partly cloudy. Waves 1 to 2 feet. .FRIDAY...Northeast wind 15 to 20 knots with gusts to around 25 knots. Partly sunny. Waves 1 to 2 feet building to 2 to 4 feet in the afternoon. A small craft advisory may be needed. $$ LSZ145-210400- Duluth MN to Port Wing WI- 548 PM CDT Wed May 20 2026 .TONIGHT...Northeast wind 5 to 10 knots. Mostly clear. Waves 1 foot or less. .THURSDAY...Northeast wind 10 to 15 knots with gusts to around 20 knots. Mostly sunny. Waves 1 to 2 feet. .THURSDAY NIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots easing to 5 knots early in the morning. Partly cloudy. Waves 1 to 2 feet. .FRIDAY...Northeast wind 15 to 20 knots with gusts to around 25 knots. Partly sunny. Waves 1 to 2 feet building to 2 to 4 feet in the afternoon. A small craft advisory may be needed. $$ LSZ146-210400- Port Wing to Sand Island WI- 548 PM CDT Wed May 20 2026 .TONIGHT...East wind 5 knots. Mostly clear. Waves 1 foot or less. .THURSDAY...Variable winds 10 knots or less becoming northeast 5 to 10 knots with gusts to around 20 knots in the late morning and afternoon. Mostly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Northeast wind 5 to 10 knots. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 foot or less. .FRIDAY...Northeast wind 10 to 15 knots with gusts to around 20 knots. Partly sunny. Waves 1 to 2 feet. $$ LSZ147-210400- Sand Island to Bayfield WI- 548 PM CDT Wed May 20 2026 .TONIGHT...Southeast wind 5 knots. Mostly clear. Waves 1 foot or less. .THURSDAY...Southeast wind 5 knots becoming east in the late morning and afternoon. Mostly sunny. Waves 1 foot or less. .THURSDAY NIGHT...East wind 5 to 10 knots becoming north early in the morning. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 foot or less. .FRIDAY...Northeast wind 10 to 15 knots with gusts to around 20 knots. Partly sunny. Waves 1 to 3 feet. $$ LSZ150-210400- Outer Apostle Islands Beyond 5 NM from Mainland- 548 PM CDT Wed May 20 2026 .TONIGHT...Southeast wind 5 to 10 knots. Mostly clear. Waves 1 foot or less. .THURSDAY...Southeast wind 5 knots becoming east in the afternoon. Sunny. Waves 1 foot or less. .THURSDAY NIGHT...East wind 5 to 10 knots becoming southeast after midnight. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 2 feet. .FRIDAY...East wind 10 to 15 knots with gusts to around 25 knots. Partly sunny. Waves 1 to 2 feet building to 2 to 4 feet late in the afternoon. $$ LSZ121-210400- Chequamegon Bay-Bayfield to Oak Point WI- 548 PM CDT Wed May 20 2026 .TONIGHT...East wind 5 to 10 knots until early morning becoming variable 10 knots or less. Mostly clear. Waves 1 foot or less. .THURSDAY...South wind 5 knots becoming east in the afternoon. Mostly sunny. Waves 1 foot or less. .THURSDAY NIGHT...Northeast wind 5 to 10 knots becoming south after midnight. Partly cloudy. Waves 1 foot or less. .FRIDAY...Northeast wind 10 to 15 knots with gusts to around 20 knots. Partly sunny. Waves 1 to 2 feet. $$ LSZ148-210400- Oak Point to Saxon Harbor WI- 548 PM CDT Wed May 20 2026 .TONIGHT...East wind 5 to 10 knots becoming south late in the night. Mostly clear. Waves 1 foot or less. .THURSDAY...South wind 5 knots becoming east in the afternoon. Mostly sunny. Waves 1 foot or less. .THURSDAY NIGHT...East wind 5 to 10 knots becoming south after midnight. Partly cloudy. Waves 1 foot or less. .FRIDAY...Northeast wind 10 to 15 knots with gusts to around 20 knots. Partly sunny. Waves 1 to 3 feet. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH