National Weather Service Marine Forecast FZUS53 KMKX

FZUS53 KMKX 210411
NSHMKX

Nearshore Marine Forecast
National Weather Service Milwaukee/Sullivan WI
1111 PM CDT Wed May 20 2026

For waters within five nautical miles of shore on Lake Michigan

LMZ643-211000
Sheboygan to Port Washington WI
1111 PM CDT Wed May 20 2026

REST OF TONIGHT
Northeast wind 15 to 20 knots easing to 10 to 15 knots early in the morning. Partly cloudy. Waves 2 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 2 to 4 feet subsiding to 1 to 3 feet late in the afternoon.

THURSDAY NIGHT
Northeast wind 10 to 15 knots with gusts to around 20 knots veering east after midnight. Partly cloudy through around midnight then becoming mostly cloudy. Waves 1 to 3 feet building to 2 to 4 feet after midnight.

FRIDAY
Northeast wind 10 to 15 knots rising to 15 to 20 knots early in the afternoon, then becoming northeast 15 to 20 knots late in the afternoon. Partly sunny. Waves 3 to 4 feet.

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LMZ644-211000
Port Washington to North Point Light WI
1111 PM CDT Wed May 20 2026

SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY EVENING

REST OF TONIGHT
Northeast wind 15 to 20 knots. 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. Mostly cloudy. Waves 3 to 4 feet.

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. Partly cloudy through around midnight then becoming mostly cloudy. Waves 3 to 4 feet.

FRIDAY
East wind 15 to 20 knots becoming northeast 10 to 15 knots with gusts to around 20 knots early in the afternoon, then rising to 15 to 20 knots late in the afternoon. Partly sunny. Waves 3 to 4 feet.

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LMZ645-211000
North Point Light to Wind Point WI
1111 PM CDT Wed May 20 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY EVENING

REST OF TONIGHT
Northeast wind 15 to 20 knots. 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 early in the afternoon backing north with gusts to around 20 knots late in the afternoon. Partly sunny. Waves 3 to 5 feet subsiding to 2 to 4 feet in the late morning and afternoon.

THURSDAY NIGHT
Northeast wind 15 to 20 knots veering east early in the morning. Mostly cloudy. Waves 3 to 4 feet.

FRIDAY
East wind 15 to 20 knots becoming northeast 10 to 15 knots early in the afternoon, then rising to 15 to 20 knots late in the afternoon. Partly sunny. Waves 3 to 5 feet.

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LMZ646-211000
Wind Point WI to Winthrop Harbor IL
1111 PM CDT Wed May 20 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY EVENING

REST OF TONIGHT
Northeast wind 15 to 20 knots. 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 early in the afternoon becoming north 15 to 20 knots late in the afternoon. Partly sunny. Waves 3 to 4 feet.

THURSDAY NIGHT
North wind 15 to 20 knots veering east after midnight. Partly cloudy through around midnight then becoming mostly cloudy. Waves 3 to 4 feet.

FRIDAY
East wind 15 to 20 knots becoming northeast 10 to 15 knots early in the afternoon, then rising to 15 to 20 knots late in the afternoon. Mostly cloudy. Waves 3 to 4 feet.

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See Lake Michigan Open Waters Forecast for Saturday through Monday.