Chicago Nearshore Marine Forecasts by Zone

 
 

 
 
 
 
 
FORECAST For Wilmette Harbor to Northerly Island (LMZ741)
 
 
 
 
 LMZ740>745-210315-
 Winthrop Harbor to Wilmette Harbor IL-
 Wilmette Harbor to Northerly Island IL-
 Northerly Island to Calumet Harbor IL-
 Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
 Burns Harbor to Michigan City IN-
 245 PM CDT Tue Oct 20 2026
 

 TONIGHT
 East winds around 10 kt becoming light and variable
 late in the evening. Mostly clear. Waves 1 ft or less.

 WEDNESDAY
 Light and variable winds becoming east around 10 kt
 in the afternoon. Mostly sunny. Waves 1 ft or less.

 WEDNESDAY NIGHT
 Southeast winds less than 10 kt becoming
 light and variable in the evening. Mostly clear. Waves 1 ft or
 less.

 THURSDAY
 Light and variable winds becoming northeast around 10
 kt. Mostly sunny. Waves 1 ft or less.
 
 $$