421 FZUS53 KDLH 241000 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 500 AM CDT Mon Aug 24 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. LSZ140-241600- Grand Portage to Grand Marais MN- 500 AM CDT Mon Aug 24 2026 .TODAY...North wind 5 knots becoming northeast late in the morning, then becoming south in the afternoon. Mostly sunny. Waves 1 foot or less. .TONIGHT...Southwest wind 5 to 10 knots becoming west after midnight. Mostly cloudy. Waves 1 foot or less. .TUESDAY...Southeast wind 5 knots. Chance of rain showers through the day. Chance of thunderstorms in the afternoon. Waves 1 foot or less. .TUESDAY NIGHT...East wind 5 knots becoming west in the late evening and overnight. Rain showers and chance of thunderstorms in the evening, then slight chance of showers and thunderstorms after midnight. Waves 1 foot or less. $$ LSZ141-241600- Grand Marais to Taconite Harbor MN- 500 AM CDT Mon Aug 24 2026 .TODAY...North wind 5 knots early in the morning becoming variable 10 knots or less, then becoming south 5 knots in the afternoon. Mostly sunny. Waves 1 foot or less. .TONIGHT...Southeast wind 5 knots early in the evening becoming variable 10 knots or less, then becoming north 5 knots early in the morning. Slight chance of rain showers after midnight. Waves 1 foot or less. .TUESDAY...East wind 5 knots. Chance of rain showers through the day. Chance of thunderstorms in the afternoon. Waves 1 foot or less. .TUESDAY NIGHT...East wind 5 knots becoming north late in the evening, then becoming west after midnight. Rain showers and chance of thunderstorms in the evening, then slight chance of showers and thunderstorms after midnight. Waves 1 foot or less. $$ LSZ142-241600- Taconite Harbor to Silver Bay Harbor MN- 500 AM CDT Mon Aug 24 2026 .TODAY...North wind 5 knots early in the morning becoming variable 10 knots or less, then becoming southeast 5 knots in the afternoon. Mostly sunny. Waves 1 foot or less. .TONIGHT...Northeast wind 5 knots. Chance of rain showers after midnight. Waves 1 foot or less. .TUESDAY...Northeast wind 5 knots becoming east in the afternoon. Chance of rain showers in the morning, then rain showers likely and chance of thunderstorms in the afternoon. Waves 1 foot or less. .TUESDAY NIGHT...Northeast wind 5 knots becoming west after midnight. Rain showers likely and chance of thunderstorms in the evening. Waves 1 foot or less. $$ LSZ143-241600- Silver Bay Harbor to Two Harbors MN- 500 AM CDT Mon Aug 24 2026 .TODAY...Variable winds 10 knots or less becoming east 5 knots in the afternoon. Mostly sunny. Waves 1 foot or less. .TONIGHT...Northeast wind 5 knots. Slight chance of rain showers after midnight. Waves 1 foot or less. .TUESDAY...Northeast wind 5 knots becoming east in the afternoon. Slight chance of thunderstorms in the morning. Chance of rain showers through the day. Chance of thunderstorms in the afternoon. Waves 1 foot or less. .TUESDAY NIGHT...Northeast wind 5 knots becoming west after midnight. Chance of thunderstorms in the evening. Chance of rain showers through the night. Waves 1 foot or less. $$ LSZ144-241600- Two Harbors to Duluth MN- 500 AM CDT Mon Aug 24 2026 .TODAY...Variable winds 10 knots or less becoming east 5 to 10 knots in the late morning and afternoon. Mostly sunny. Waves 1 foot or less. .TONIGHT...Northeast wind 5 to 10 knots. Slight chance of rain showers after midnight. Waves 1 foot or less. .TUESDAY...East wind 5 knots becoming southeast in the late morning and afternoon. Chance of rain showers and slight chance of thunderstorms in the morning, then chance of thunderstorms and slight chance of rain showers in the afternoon. Waves 1 foot or less. .TUESDAY NIGHT...Southeast wind 5 to 10 knots becoming northwest late in the evening, then becoming west after midnight. Chance of showers and thunderstorms in the evening. Waves 1 foot or less. $$ LSZ145-241600- Duluth MN to Port Wing WI- 500 AM CDT Mon Aug 24 2026 .TODAY...South wind 5 knots becoming east in the late morning and afternoon. Patchy dense fog early in the morning. Waves 1 foot or less. .TONIGHT...East wind 5 to 10 knots. Slight chance of rain showers after midnight. Waves 1 foot or less. .TUESDAY...Southeast wind 5 knots becoming south in the late morning and afternoon. Slight chance of thunderstorms in the morning. Chance of rain showers through the day. Chance of thunderstorms in the afternoon. Waves 1 foot or less. .TUESDAY NIGHT...South wind 5 to 10 knots becoming west in the late evening and overnight. Chance of showers and thunderstorms in the evening. Waves 1 foot or less. $$ LSZ146-241600- Port Wing to Sand Island WI- 500 AM CDT Mon Aug 24 2026 .TODAY...Variable winds 10 knots or less becoming northeast 5 knots in the afternoon. Patchy fog early in the morning. Waves 1 foot or less. .TONIGHT...East wind 5 knots. Mostly cloudy. Waves 1 foot or less. .TUESDAY...Southeast wind 5 knots becoming south late in the morning, then becoming west early in the afternoon becoming east late in the afternoon. Chance of rain showers through the day. Chance of thunderstorms in the afternoon. Waves 1 foot or less. .TUESDAY NIGHT...East wind 5 to 10 knots becoming northwest late in the evening, then becoming west after midnight. Chance of thunderstorms in the evening. Chance of showers through the night. Waves 1 foot or less. $$ LSZ147-241600- Sand Island to Bayfield WI- 500 AM CDT Mon Aug 24 2026 .TODAY...Variable winds 10 knots or less becoming east 5 knots in the afternoon. Mostly sunny. Waves 1 foot or less. .TONIGHT...Southeast wind 5 knots. Mostly cloudy. Waves 1 foot or less. .TUESDAY...South wind 5 knots. Chance of rain showers through the day. Chance of thunderstorms in the afternoon. Waves 1 foot or less. .TUESDAY NIGHT...Southeast wind 5 knots becoming southwest in the late evening and early morning, then becoming west early in the morning. Showers likely and chance of thunderstorms in the evening. Waves 1 foot or less. $$ LSZ150-241600- Outer Apostle Islands Beyond 5 NM from Mainland- 500 AM CDT Mon Aug 24 2026 .TODAY...Northwest wind 5 knots becoming east in the afternoon. Mostly sunny. Waves 1 foot or less. .TONIGHT...Southeast wind 5 knots. Mostly cloudy. Waves 1 foot or less. .TUESDAY...South wind 5 to 10 knots. Chance of rain showers through the day. Chance of thunderstorms in the afternoon. Waves 1 foot or less. .TUESDAY NIGHT...Southeast wind 5 to 10 knots becoming southwest in the late evening and overnight. Chance of thunderstorms in the evening. Showers likely through the night. Slight chance of thunderstorms after midnight. Waves 1 foot or less. $$ LSZ121-241600- Chequamegon Bay-Bayfield to Oak Point WI- 500 AM CDT Mon Aug 24 2026 .TODAY...West wind 5 knots early in the morning becoming variable 10 knots or less, then becoming east 5 knots in the afternoon. Mostly sunny. Waves 1 foot or less. .TONIGHT...East wind 5 knots becoming south after midnight. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 foot or less. .TUESDAY...South wind 5 to 10 knots. Gusts up to 20 knots in the afternoon. Chance of rain showers through the day. Chance of thunderstorms in the afternoon. Waves 1 foot or less. .TUESDAY NIGHT...Southwest wind 5 to 10 knots becoming west after midnight. Chance of thunderstorms in the evening. Showers likely through the night. Waves 1 foot or less. $$ LSZ148-241600- Oak Point to Saxon Harbor WI- 500 AM CDT Mon Aug 24 2026 .TODAY...Southwest wind 5 knots becoming northwest late in the morning, then becoming east in the afternoon. Mostly sunny. Waves 1 foot or less. .TONIGHT...East wind 5 knots becoming south after midnight. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 foot or less. .TUESDAY...South wind 5 to 10 knots. Chance of rain showers through the day. Chance of thunderstorms in the afternoon. Waves 1 foot or less. .TUESDAY NIGHT...South wind 5 to 10 knots becoming southwest after midnight. Chance of thunderstorms in the evening. Showers likely through the night. Waves 1 foot or less. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH  220 FZUS53 KMKX 241010 NSHMKX Nearshore Marine Forecast National Weather Service Milwaukee/Sullivan WI 510 AM CDT Mon Aug 24 2026 For waters within five nautical miles of shore on Lake Michigan LMZ643-241600- Sheboygan to Port Washington WI- 510 AM CDT Mon Aug 24 2026 .TODAY...Northwest wind 10 to 15 knots becoming north 5 to 10 knots in the afternoon. Sunny. Waves around 1 foot. .TONIGHT...South wind 5 to 10 knots veering west after midnight. Mostly clear. Waves nearly calm. .TUESDAY...Southwest wind 5 to 10 knots becoming south 10 to 20 knots early in the afternoon, then becoming 15 to 20 knots with gusts to around 25 knots late in the afternoon. Mostly sunny. Waves around 1 foot building to 3 to 4 feet late in the afternoon. .TUESDAY NIGHT...South wind 15 to 20 knots veering southwest early in the morning. Gusts up to 25 knots. Slight chance of showers through around midnight, then chance of showers and slight chance of thunderstorms after midnight. Waves 3 to 4 feet. $$ LMZ644-241600- Port Washington to North Point Light WI- 510 AM CDT Mon Aug 24 2026 .TODAY...Northwest wind 5 to 10 knots veering north late in the afternoon. Sunny. Waves around 1 foot. .TONIGHT...South wind 5 to 10 knots veering southwest after midnight. Mostly clear. Waves around 1 foot. .TUESDAY...Southwest wind 5 to 10 knots becoming south 10 to 15 knots early in the afternoon, then rising to 15 to 20 knots late in the afternoon. Partly sunny. Waves around 1 foot building to 2 to 4 feet late in the afternoon. .TUESDAY NIGHT...South wind 10 to 20 knots becoming 10 to 15 knots late in the evening, then becoming south 10 to 15 knots after midnight veering southwest early in the morning. Chance of showers and slight chance of thunderstorms after midnight. Waves 2 to 4 feet subsiding to 1 to 2 feet after midnight. $$ LMZ645-241600- North Point Light to Wind Point WI- 510 AM CDT Mon Aug 24 2026 .TODAY...Northwest wind 5 to 10 knots rising to 10 to 15 knots late in the morning, then becoming north 5 to 10 knots in the afternoon. Sunny. Waves 1 to 2 feet. .TONIGHT...East wind 5 to 10 knots veering southwest late in the evening, then becoming southwest 5 to 10 knots after midnight. Partly cloudy. Waves around 1 foot. .TUESDAY...Southwest wind 5 to 10 knots becoming south 10 to 15 knots with gusts to around 20 knots in the afternoon. Partly sunny. Waves around 1 foot. .TUESDAY NIGHT...South wind 10 to 15 knots veering southwest early in the morning. Chance of showers and slight chance of thunderstorms after midnight. Waves 1 to 2 feet. $$ LMZ646-241600- Wind Point WI to Winthrop Harbor IL- 510 AM CDT Mon Aug 24 2026 .TODAY...Northwest wind 5 to 10 knots rising to 10 to 15 knots late in the morning, then becoming north 5 to 10 knots early in the afternoon veering northeast late in the afternoon. Sunny. Waves 1 to 2 feet. .TONIGHT...East wind 5 to 10 knots becoming southwest late in the evening, then rising to 5 to 10 knots after midnight. Mostly clear. Waves around 1 foot. .TUESDAY...Southwest wind 5 to 10 knots becoming south 10 to 15 knots in the afternoon. Partly sunny. Waves around 1 foot. .TUESDAY NIGHT...South wind 10 to 15 knots veering southwest early in the morning. Slight chance of showers after midnight. Waves 1 to 2 feet. $$ See Lake Michigan Open Waters Forecast for Wednesday through Friday.