Coastal Waters Forecast for Wind Point WI to Winthrop Harbor IL (LMZ646) (Text-Only)
NWS Forecast for: Wind Point WI to Winthrop Harbor IL (LMZ646)
Issued by: National Weather Service Milwaukee, WI
Last Update: 510 PM CDT Fri Apr 17 2026




Tonight: South wind 15 to 20 knots easing to 10 to 15 knots after midnight, then becoming west 15 to 20 knots early in the morning. Gusts up to 25 knots. Patchy fog until early morning. Chance of thunderstorms through around midnight. Rain showers through the night. Chance of thunderstorms after midnight. Waves 4 to 6 feet subsiding to 3 to 5 feet late in the evening, then subsiding to 3 to 4 feet after midnight.

Saturday: Northwest wind 15 to 20 knots backing west in the afternoon. Gusts up to 25 knots. Mostly cloudy in the morning then clearing. Waves 2 to 4 feet subsiding to 1 to 2 feet in the afternoon.

Saturday Night: West wind 15 to 20 knots with gusts to around 25 knots easing to 10 to 15 knots after midnight, then becoming west 10 to 15 knots early in the morning. Partly cloudy through around midnight then becoming clear. Waves 1 to 2 feet.

Sunday: West wind 10 to 15 knots veering northwest late in the afternoon. Slight chance of showers in the afternoon. Waves around 1 foot.







Zone Forecast: Wind Point WI to Winthrop Harbor IL (LMZ646)

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