Coastal Waters Forecast for Northerly Island to Calumet Harbor IL (LMZ742) (Text-Only)
NWS Forecast for: Northerly Island to Calumet Harbor IL (LMZ742)
Issued by: National Weather Service Chicago, IL
Last Update: 945 PM CDT Fri Jul 11 2025




Rest Of Tonight: South winds 10 to 15 kt. Scattered thunderstorms late this evening, then showers and a chance of thunderstorms after midnight. Waves 1 to 2 ft. Winds and waves higher in and near thunderstorms.

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: Northerly Island to Calumet Harbor IL (LMZ742)

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