Chicago Nearshore Marine Forecasts by Zone

 
 

 
 
 
 
 
FORECAST For Wilmette Harbor to Northerly Island (LMZ741)
 
 
 
 
 LMZ740>744-171615-
 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-
 313 AM CST Fri Jan 17 2025
 
 SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY AFTERNOON
 

 TODAY
 South winds 15 to 25 kt increasing to 30 kt. A few gale
 force gusts to 35 kt possible. Mostly sunny in the morning, then
 becoming partly cloudy. Waves 2 to 4 ft building to 3 to 5 ft.

 TONIGHT
 Southwest winds 20 to 25 kt becoming northwest
 overnight. Chance of rain and snow. Waves 1 to 3 ft building to 3
 to 5 ft.

 SATURDAY
 Northwest winds 30 kt diminishing to 15 to 25 kt.
 Mostly cloudy in the morning then clearing. Waves 4 to 6 ft
 occasionally to 8 ft subsiding to 3 to 5 ft.

 SATURDAY NIGHT
 Northwest winds 15 to 25 kt. Mostly cloudy.
 Waves to 3 to 5 ft.
 
 Wave heights are for ice free areas.
 
 $$