Coastal Waters Forecast for Sheboygan to Port Washington WI (LMZ643) (Text-Only)
NWS Forecast for: Sheboygan to Port Washington WI (LMZ643)
Issued by: National Weather Service Milwaukee, WI
Last Update: 105 AM CDT Thu Sep 18 2025
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Rest Of Tonight: Southwest wind 5 knots rising to 5 to 10 knots early in the morning. Partly cloudy. Waves nearly calm.

Thursday: Northwest wind 5 to 10 knots veering north late in the morning, then becoming northeast 10 to 15 knots in the afternoon. Partly sunny. Waves around 1 foot.

Thursday Night: Northeast wind 10 to 15 knots. Mostly cloudy through around midnight then becoming partly cloudy. Waves 1 to 3 feet building to 2 to 4 feet after midnight.

Friday: Northeast wind 10 to 15 knots veering east in the late morning and early afternoon, then backing northeast late in the afternoon. Partly sunny. Waves 2 to 4 feet subsiding to 1 to 3 feet late in the afternoon.







Zone Forecast: Sheboygan to Port Washington WI (LMZ643)

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