Chicago Nearshore Marine Forecasts by Zone

 
 

 
 
 
 
 
FORECAST For Wilmette Harbor to Northerly Island (LMZ741)
 
 
 
 
 LMZ740>742-130345-
 Winthrop Harbor to Wilmette Harbor IL-
 Wilmette Harbor to Northerly Island IL-
 Northerly Island to Calumet Harbor IL-
 246 PM CDT Mon May 12 2025
 

 TONIGHT
 North winds 10 to 15 kt becoming east after midnight.
 Chance of showers and slight chance of thunderstorms. Patchy fog
 after midnight. Waves 1 to 2 ft.

 TUESDAY
 East winds 5 to 10 kt. Patchy fog. Chance of showers
 and slight chance of thunderstorms in the morning, then slight
 chance of showers and thunderstorms in the afternoon. Waves 1 to
 2 ft.

 TUESDAY NIGHT
 Northeast winds 5 to 10 kt becoming north
 overnight. Patchy fog in the evening. Slight chance of showers
 and thunderstorms in the evening. Waves around 1 ft.

 WEDNESDAY
 East winds 5 to 10 kt. Slight chance of showers in
 the morning, then chance of showers and slight chance of
 thunderstorms in the afternoon. Waves around 1 ft.
 
 $$