Chicago Nearshore Marine Forecasts by Zone

 
 

 
 
 
 
 
FORECAST For Wilmette Harbor to Northerly Island (LMZ741)
 
 
 
 
 LMZ740>742-070445-
 Winthrop Harbor to Wilmette Harbor IL-
 Wilmette Harbor to Northerly Island IL-
 Northerly Island to Calumet Harbor IL-
 222 PM CST Tue Jan 6 2026
 

 TONIGHT
 West winds 10 to 15 kt. Patchy drizzle in the evening.
 Patchy fog. Waves 1 to 2 ft.

 WEDNESDAY
 Southwest winds 10 to 15 kt. Patchy fog in the
 morning. Waves 1 to 2 ft.

 WEDNESDAY NIGHT
 South winds 10 to 15 kt. Mostly clear in the
 evening, then becoming mostly cloudy. Waves 1 to 3 ft.

 THURSDAY
 South winds around 15 kt increasing to 10 to 20 kt.
 Slight chance of rain in the morning, then rain in the afternoon.
 Waves 1 to 3 ft.
 
 $$