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Coastal Waters Forecast for Winthrop Harbor to Wilmette Harbor IL (LMZ740) (Text-Only)
NWS Forecast for: Winthrop Harbor to Wilmette Harbor IL (LMZ740)
Issued by: National Weather Service Chicago, IL
Last Update: 916 AM CDT Thu Jul 3 2025




Rest Of Today: West winds around 5 kt becoming northeast by noon, then becoming east 10 to 15 kt in the afternoon. Slight chance of showers and thunderstorms mid to late afternoon. Waves 1 ft or less building to 1 to 2 ft.

Tonight: East winds 5 to 10 kt becoming southeast overnight. Slight chance of showers and thunderstorms in the evening. Waves 1 to 2 ft subsiding to 1 ft or less.

Friday: South winds 5 to 10 kt becoming southeast 10 to 15 kt in the afternoon. Slight chance of showers in the morning. Waves 1 to 2 ft.

Friday Night: South winds around 10 kt. Partly cloudy in the evening, then becoming mostly clear. Waves 1 to 2 ft.







Zone Forecast: Winthrop Harbor to Wilmette Harbor IL (LMZ740)

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