Chicago Nearshore Marine Forecasts by Zone

 
 

 
 
 
 
 
FORECAST For Wilmette Harbor to Northerly Island (LMZ741)
 
 
 
 
 LMZ740>742-102115-
 Winthrop Harbor to Wilmette Harbor IL-
 Wilmette Harbor to Northerly Island IL-
 Northerly Island to Calumet Harbor IL-
 307 AM CDT Sun May 10 2026
 

 EARLY THIS MORNING
 Northeast winds 10 to 15 kt. Clear. Waves 1
 to 3 ft.

 TODAY
 North winds around 10 kt becoming east and increasing to
 10 to 15 kt in the afternoon. Sunny in the morning, then becoming
 partly cloudy. Waves 1 to 3 ft.

 TONIGHT
 East winds 10 to 15 kt becoming northeast late. Mostly
 cloudy in the evening, then becoming partly cloudy. Waves 1 to
 3 ft.

 MONDAY
 Northeast winds 10 to 15 kt. Sunny. Waves 1 to 3 ft.

 MONDAY NIGHT
 East winds 10 to 15 kt becoming southeast
 overnight. Clear in the evening, then becoming partly cloudy.
 Waves 1 to 3 ft.
 
 $$