Chicago Nearshore Marine Forecasts by Zone

 
 

 
 
 
 
 
FORECAST For Wilmette Harbor to Northerly Island (LMZ741)
 
 
 
 
 LMZ740>743-122230-
 Winthrop Harbor to Wilmette Harbor IL-
 Wilmette Harbor to Northerly Island IL-
 Northerly Island to Calumet Harbor IL-
 Calumet Harbor IL to Gary IN-
 942 AM CST Mon Jan 12 2026
 
 SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH LATE
 TUESDAY NIGHT
 

 REST OF TODAY
 Southwest winds 15 to 20 kt. Partly cloudy.
 Waves 2 to 4 ft subsiding to 1 to 2 ft.

 TONIGHT
 Southwest winds 10 to 20 kt increasing to 20 to 25 kt
 late. Mostly clear in the evening, then becoming mostly cloudy.
 Waves 1 to 3 ft.

 TUESDAY
 Southwest winds 20 to 25 kt. A chance of sprinkles in
 the afternoon. Waves 2 to 4 ft.

 TUESDAY NIGHT
 West winds 20 to 25 kt becoming northwest late.
 Mostly cloudy. Waves 2 to 4 ft.
 
 $$