Chicago Nearshore Marine Forecasts by Zone

 
 

 
 
 
 
 
FORECAST For Wilmette Harbor to Northerly Island (LMZ741)
 
 
 
 
 LMZ740>743-041015-
 Winthrop Harbor to Wilmette Harbor IL-
 Wilmette Harbor to Northerly Island IL-
 Northerly Island to Calumet Harbor IL-
 Calumet Harbor IL to Gary IN-
 940 PM CST Mon Nov 3 2025
 

 REST OF TONIGHT
 West winds 15 to 20 kt diminishing to 10 to
 15 kt. Increasing cloudiness. Waves 1 to 3 ft.

 TUESDAY
 Southwest winds 10 to 15 kt becoming south in the
 afternoon. Decreasing cloudiness in the afternoon. Waves 1 to 2
 ft building to 2 to 4 ft.

 TUESDAY NIGHT
 South winds 15 to 25 kt becoming southwest to
 30 kt. Partly cloudy. Waves 3 to 5 ft.

 WEDNESDAY
 West winds 15 to 25 kt becoming northwest in the
 afternoon. Partly cloudy in the morning then clearing. Waves 3 to
 5 ft.
 
 $$