Chicago Nearshore Marine Forecasts by Zone

 
 

 
 
 
 
 
FORECAST For Wilmette Harbor to Northerly Island (LMZ741)
 
 
 
 
 LMZ740>742-102215-
 Winthrop Harbor to Wilmette Harbor IL-
 Wilmette Harbor to Northerly Island IL-
 Northerly Island to Calumet Harbor IL-
 958 AM CST Tue Nov 10 2026
 

 REST OF TODAY
 Northwest winds around 10 kt becoming southeast
 around 5 kt this afternoon. Sunny. Waves around 1 ft.

 TONIGHT
 Southwest winds around 5 kt becoming south late.
 Partly cloudy in the evening, then becoming mostly cloudy. Waves 1
 ft or less.

 WEDNESDAY
 Southeast winds 5 to 10 kt becoming northeast and
 increasing to 15 to 20 kt in the afternoon. Chance of showers.
 Waves 1 ft or less building to 2 to 4 ft late.

 WEDNESDAY NIGHT
 North winds 15 to 25 kt increasing to 30 kt.
 Chance of showers. Waves 3 to 5 ft building to 5 to 8 ft
 occasionally to 10 ft. A small craft advisory will be needed.
 
 $$