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: 332 PM CDT Fri Jul 11 2025




Late This Afternoon: Southeast winds 5 to 10 kt. Slight chance of showers and thunderstorms. Waves around 1 ft.

Tonight: Southeast winds 5 to 10 kt becoming south 10 to 15 kt late. Showers and thunderstorms likely in the evening, then chance of showers and thunderstorms after midnight. Waves around 1 ft.

Saturday: Southwest winds 10 to 15 kt. Chance of showers and thunderstorms. Waves around 1 ft.

Saturday Night: West winds 10 to 15 kt. Slight chance of showers in the evening. Waves around 1 ft.

Sunday: West winds 5 to 10 kt. Partly cloudy. Waves around 1 ft.







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

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