Chicago Nearshore Marine Forecasts by Zone

 
 

 
 
 
 
 
FORECAST For Wilmette Harbor to Northerly Island (LMZ741)
 
 
 
 
 LMZ740>744-210915-
 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-
 916 PM CDT Fri Jun 20 2025
 
 GALE WARNING IN EFFECT FROM 9 AM CDT SATURDAY THROUGH SATURDAY
 EVENING
 

 REST OF TONIGHT
 South winds 15 to 25 kt. Mostly clear. Waves
 2 to 4 ft.

 SATURDAY
 South winds 15 to 25 kt becoming southwest gales to
 35 kt by late morning. Mostly sunny. Waves 2 to 4 ft building to
 3 to 5 ft.

 SATURDAY NIGHT
 Southwest gales to 35 kt diminishing to 15 to
 25 kt. Clear. Waves 3 to 5 ft subsiding to 2 to 4 ft.

 SUNDAY
 Southwest winds 15 to 25 kt increasing to 30 kt. Sunny.
 Waves 2 to 4 ft.
 
 $$