National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
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: 934 PM CDT Sat Aug 30 2025		Print

Rest Of Tonight: Northeast winds 5 to 10 kt becoming east late. Clear. Waves around 1 ft.

Sunday: East winds 5 to 10 kt becoming northeast. Sunny. Waves around 1 ft.

Sunday Night: Northeast winds 5 to 10 kt becoming east overnight. Mostly clear. Waves around 1 ft.

Monday: East winds 5 to 10 kt. Sunny. Waves around 1 ft.






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

Visit your local NWS office at: https://www.weather.gov/lot