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: 307 PM CDT Sat Jul 12 2025
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Tonight: West winds 10 to 15 kt easing to 5 to 10 kt and becoming northwest overnight. Slight chance of showers in the evening. waves around 1 ft.

Sunday: Northwest winds 5 to 10 kt becoming east late. Partly cloudy. Waves around 1 ft.

Sunday Night: South winds 5 to 10 kt becoming southwest overnight. Partly cloudy in the evening then clearing. Waves 1 ft or less.

Monday: Southwest winds 5 to 10 kt becoming south. Sunny. Waves around 1 ft.







Zone Forecast: Northerly Island to Calumet Harbor IL (LMZ742)

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