FZUS53 KMKX 211010 NSHMKX Nearshore Marine Forecast National Weather Service Milwaukee/Sullivan WI 510 AM CDT Sat Mar 21 2026 For waters within five nautical miles of shore on Lake Michigan LMZ643-211600- Sheboygan to Port Washington WI- 510 AM CDT Sat Mar 21 2026 .TODAY...Southeast wind 5 to 10 knots becoming south 10 to 15 knots with gusts to around 20 knots late in the morning, then rising to 15 to 20 knots early in the afternoon becoming south 15 to 20 knots late in the afternoon. Partly sunny. Waves 1 to 2 feet building to 3 to 4 feet in the afternoon. .TONIGHT...Southwest wind 10 to 15 knots veering west late in the evening, then veering north after midnight becoming 10 to 20 knots early in the morning. Slight chance of rain after midnight. Waves 3 to 4 feet subsiding to 1 to 2 feet after midnight, then building to 2 to 4 feet early in the morning. .SUNDAY...North wind 15 to 25 knots. Chance of rain through the day. Waves 3 to 4 feet building to 5 to 7 feet. A small craft advisory may be needed. .SUNDAY NIGHT...North wind 15 to 25 knots becoming 15 to 20 knots after midnight, then becoming 10 to 20 knots early in the morning. Mostly cloudy through around midnight then becoming partly cloudy. Waves 5 to 7 feet subsiding to 3 to 5 feet. $$ LMZ644-211600- Port Washington to North Point Light WI- 510 AM CDT Sat Mar 21 2026 .TODAY...Southeast wind 5 to 10 knots becoming south 10 to 15 knots late in the morning, then rising to 15 to 20 knots early in the afternoon becoming south 15 to 20 knots late in the afternoon. Partly sunny. Waves around 1 foot building to 2 to 4 feet in the afternoon. .TONIGHT...Southwest wind 10 to 15 knots with gusts to around 20 knots veering west late in the evening, then veering north after midnight rising to 15 to 20 knots early in the morning. Slight chance of rain after midnight. Waves 2 to 4 feet subsiding to 1 to 2 feet in the late evening and overnight. .SUNDAY...North wind 15 to 20 knots becoming 15 to 25 knots late in the morning, then becoming north 15 to 25 knots with gusts to around 30 knots in the afternoon. Chance of rain through the day. Slight chance of snow in the afternoon. Waves 3 to 4 feet building to 7 to 9 feet. A small craft advisory may be needed. .SUNDAY NIGHT...North wind 15 to 25 knots becoming 15 to 20 knots after midnight, then becoming 10 to 20 knots early in the morning. Mostly cloudy through around midnight then becoming partly cloudy. Waves 7 to 9 feet subsiding to 4 to 6 feet. $$ LMZ645-211600- North Point Light to Wind Point WI- 510 AM CDT Sat Mar 21 2026 .TODAY...Southeast wind 5 to 10 knots becoming south 10 to 15 knots late in the morning, then becoming south 10 to 15 knots with gusts to around 20 knots early in the afternoon rising to 15 to 20 knots late in the afternoon. Mostly cloudy in the morning then becoming mostly sunny. Waves 1 to 2 feet. .TONIGHT...Southwest wind 10 to 15 knots with gusts to around 20 knots veering west late in the evening, then veering northwest after midnight becoming north 15 to 20 knots early in the morning. Partly cloudy through around midnight then becoming mostly cloudy. Waves 1 to 2 feet. .SUNDAY...North wind 15 to 20 knots rising to up to 30 knots. Chance of rain through the day. Slight chance of snow in the afternoon. Waves 3 to 4 feet building to 7 to 9 feet. A small craft advisory may be needed. .SUNDAY NIGHT...North wind up to 30 knots easing to 15 to 25 knots in the late evening and early morning, then becoming 15 to 20 knots early in the morning. Mostly cloudy through around midnight then becoming partly cloudy. Waves 7 to 9 feet subsiding to 5 to 7 feet early in the morning. $$ LMZ646-211600- Wind Point WI to Winthrop Harbor IL- 510 AM CDT Sat Mar 21 2026 .TODAY...Southeast wind 5 to 10 knots becoming south 10 to 15 knots late in the morning, then becoming south 10 to 15 knots with gusts to around 20 knots in the afternoon. Partly sunny. Waves 1 to 2 feet. .TONIGHT...Southwest wind 10 to 15 knots with gusts to around 20 knots becoming southwest 10 to 15 knots late in the evening, then veering west after midnight veering north 10 to 20 knots early in the morning. Partly cloudy. Waves around 1 foot. .SUNDAY...North wind 15 to 20 knots rising to up to 30 knots. Chance of rain through the day. Slight chance of snow in the afternoon. Waves 4 to 6 feet building to 7 to 9 feet. A small craft advisory may be needed. .SUNDAY NIGHT...North wind 15 to 25 knots with gusts to around 30 knots becoming 15 to 20 knots after midnight, then becoming 10 to 20 knots early in the morning. Mostly cloudy. Waves 7 to 9 feet subsiding to 5 to 7 feet. $$ See Lake Michigan Open Waters Forecast for Monday through Wednesday.