Chicago Nearshore Marine Forecasts by Zone

 
 

 
 
 
 
 
FORECAST For Wilmette Harbor to Northerly Island (LMZ741)
 
 
 
 
 LMZ740>743-160415-
 Winthrop Harbor to Wilmette Harbor IL-
 Wilmette Harbor to Northerly Island IL-
 Northerly Island to Calumet Harbor IL-
 Calumet Harbor IL to Gary IN-
 956 AM CST Thu Jan 15 2026
 
 SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 PM CST THIS AFTERNOON
 

 REST OF TODAY
 Northwest winds 15 to 25 kt becoming southwest
 and diminishing to around 15 kt in the afternoon. Freezing spray
 late in the morning. A few flurries. Waves 5 to 8 ft occasionally
 to 10 ft subsiding to 3 to 5 ft.

 TONIGHT
 Southwest winds 15 to 25 kt increasing to 30 kt. Snow.
 Waves 3 to 5 ft.

 FRIDAY
 Southwest winds 20 to 25 kt becoming west. Snow showers
 likely in the morning, then chance of snow showers in the
 afternoon. Waves 2 to 4 ft.

 FRIDAY NIGHT
 West winds 15 to 25 kt. Chance of snow showers.
 Waves 1 to 3 ft.
 
 $$