Chicago Nearshore Marine Forecasts by Zone

 
 

 
 
 
 
 
FORECAST For Wilmette Harbor to Northerly Island (LMZ741)
 
 
 
 
 LMZ740>742-192115-
 Winthrop Harbor to Wilmette Harbor IL-
 Wilmette Harbor to Northerly Island IL-
 Northerly Island to Calumet Harbor IL-
 959 AM CDT Fri Jun 19 2026
 

 TODAY
 Northwest winds 10 to 15 kt becoming east early in the
 afternoon then becoming southeast late in the afternoon. Sunny.
 Waves 1 to 2 ft.

 TONIGHT
 South winds 10 to 15 kt becoming west overnight.
 Chance of showers and slight chance of thunderstorms in the
 evening, then chance of showers overnight. Waves around 1 ft.

 SATURDAY
 West winds 10 to 15 kt becoming northwest in the
 afternoon. Sunny. Waves 1 to 2 ft.

 SATURDAY NIGHT
 North winds around 10 kt becoming northeast
 overnight. Partly cloudy in the evening, then becoming mostly
 cloudy. Waves 1 ft or less.
 
 $$