FZUS53 KMKX 200810 NSHMKX Nearshore Marine Forecast National Weather Service Milwaukee/Sullivan WI 310 AM CDT Wed May 20 2026 For waters within five nautical miles of shore on Lake Michigan LMZ643-202100- Sheboygan to Port Washington WI- 310 AM CDT Wed May 20 2026 .EARLY THIS MORNING...Northwest wind 10 to 15 knots. Partly cloudy. Waves 1 to 2 feet. .TODAY...North wind 10 to 15 knots veering northeast late in the afternoon. Mostly sunny. Waves 1 to 2 feet building to 2 to 4 feet in the afternoon. .TONIGHT...Northeast wind 10 to 15 knots. Partly cloudy. Waves 2 to 4 feet. .THURSDAY...Northeast wind 10 to 15 knots. Partly sunny. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .THURSDAY NIGHT...Northeast wind 15 to 20 knots easing to 10 to 15 knots late in the evening, then becoming east 15 to 20 knots after midnight easing to 10 to 15 knots early in the morning. Mostly cloudy. Waves 2 to 4 feet. $$ LMZ644-202100- Port Washington to North Point Light WI- 310 AM CDT Wed May 20 2026 .EARLY THIS MORNING...Northwest wind 10 to 15 knots. Partly cloudy. Waves 1 to 2 feet. .TODAY...North wind 10 to 15 knots veering northeast late in the morning, then rising to 15 to 20 knots in the afternoon. Mostly sunny. Waves 1 to 2 feet building to 2 to 4 feet in the afternoon. .TONIGHT...Northeast wind 10 to 15 knots rising to 15 to 20 knots late in the evening, then becoming northeast 15 to 20 knots after midnight. Partly cloudy. Waves 3 to 4 feet. .THURSDAY...Northeast wind 15 to 20 knots easing to 10 to 15 knots late in the morning, then becoming northeast 10 to 15 knots in the afternoon. Partly sunny. Waves 3 to 4 feet subsiding to 1 to 3 feet late in the afternoon. .THURSDAY NIGHT...Northeast wind 15 to 20 knots veering east early in the morning. Mostly cloudy. Waves 3 to 4 feet. $$ LMZ645-202100- North Point Light to Wind Point WI- 310 AM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH THURSDAY MORNING... .EARLY THIS MORNING...Northwest wind 10 to 15 knots veering north early in the morning. Partly cloudy. Waves 1 to 2 feet. .TODAY...North wind 10 to 15 knots becoming northeast 15 to 20 knots in the late morning and afternoon. Mostly sunny. Waves 1 to 2 feet building to 3 to 4 feet in the late morning and afternoon. .TONIGHT...Northeast wind 15 to 20 knots becoming 10 to 20 knots after midnight, then becoming 15 to 20 knots early in the morning. Partly cloudy. Waves 3 to 4 feet building to 4 to 6 feet in the late evening and overnight. .THURSDAY...Northeast wind 15 to 20 knots easing to 10 to 15 knots late in the morning, then becoming northeast 10 to 15 knots in the afternoon. Partly sunny. Waves 3 to 4 feet. .THURSDAY NIGHT...Northeast wind 15 to 20 knots veering east 10 to 20 knots after midnight. Mostly cloudy. Waves 3 to 4 feet. $$ LMZ646-202100- Wind Point WI to Winthrop Harbor IL- 310 AM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH THURSDAY MORNING... .EARLY THIS MORNING...Northwest wind 10 to 15 knots veering north early in the morning. Partly cloudy. Waves 1 to 2 feet. .TODAY...North wind 10 to 15 knots rising to 15 to 20 knots late in the morning, then veering northeast in the afternoon. Partly sunny. Waves 1 to 2 feet building to 3 to 4 feet in the late morning and afternoon. .TONIGHT...North wind 15 to 20 knots veering northeast early in the morning. Partly cloudy. Waves 3 to 4 feet building to 4 to 6 feet in the late evening and overnight. .THURSDAY...Northeast wind 15 to 20 knots becoming east 10 to 15 knots late in the morning, then backing northeast early in the afternoon becoming northeast 10 to 15 knots with gusts to around 20 knots late in the afternoon. Partly sunny. Waves 3 to 4 feet. .THURSDAY NIGHT...Northeast wind 15 to 20 knots veering east after midnight. Mostly cloudy. Waves 3 to 4 feet. $$ See Lake Michigan Open Waters Forecast for Friday through Sunday.