Chicago Nearshore Marine Forecasts by Zone

 
 

 
 
 
 
 
FORECAST For Wilmette Harbor to Northerly Island (LMZ741)
 
 
 
 
 LMZ740>743-281615-
 Winthrop Harbor to Wilmette Harbor IL-
 Wilmette Harbor to Northerly Island IL-
 Northerly Island to Calumet Harbor IL-
 Calumet Harbor IL to Gary IN-
 250 AM CST Wed Jan 28 2026
 

 TODAY
 West winds 15 to 20 kt. Partly cloudy. Waves 1 to 2 ft.

 TONIGHT
 Northwest winds 10 to 20 kt. Partly cloudy. Waves 1 to
 3 ft.

 THURSDAY
 Northwest winds 10 to 15 kt. Partly cloudy. Waves
 1 to 3 ft.

 THURSDAY NIGHT
 Northwest winds 10 to 20 kt. Chance of snow
 overnight. Waves 1 to 3 ft building to 3 to 5 ft.
 
 Wave heights are for ice free areas.
 
 $$