Chicago Nearshore Marine Forecasts by Zone

 
 

 
 
 
 
 
FORECAST For Wilmette Harbor to Northerly Island (LMZ741)
 
 
 
 
 LMZ740>742-302145-
 Winthrop Harbor to Wilmette Harbor IL-
 Wilmette Harbor to Northerly Island IL-
 Northerly Island to Calumet Harbor IL-
 319 AM CDT Sat May 30 2026
 
 SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM CDT THIS MORNING
 THROUGH THIS EVENING
 

 EARLY THIS MORNING
 Northeast winds 10 to 15 kt. Partly cloudy.
 Waves 1 to 2 ft.

 TODAY
 East winds 15 to 25 kt becoming northeast late. Partly
 cloudy. Waves 2 to 4 ft building to 3 to 6 ft occasionally to 8
 ft early.

 TONIGHT
 Northeast winds 15 to 20 kt becoming southeast 10 to
 15 kt overnight. Partly cloudy. Waves 3 to 6 ft occasionally to 8
 ft subsiding to 2 to 4 ft early.

 SUNDAY
 Southeast winds 10 to 15 kt becoming northeast in the
 afternoon. Mostly sunny in the morning, then becoming partly
 cloudy. Waves 1 to 3 ft.

 SUNDAY NIGHT
 Northeast winds around 10 kt becoming around
 5 kt. Mostly cloudy. Waves 1 to 2 ft.
 
 $$