


Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
393 FZUS53 KLOT 022012 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 312 PM CDT Sat Aug 2 2025 For waters within five nautical miles of shore on Lake Michigan Waves are provided as a range of significant wave heights, which is the average of the highest 1/3 of the waves, along with the average height of the highest 10 percent of the waves which will occasionally be encountered. LMZ740>742-030330- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 312 PM CDT Sat Aug 2 2025 .TONIGHT...Northeast winds 5 to 10 kt. Mostly clear. Waves around 1 ft. .SUNDAY...Northeast winds 5 to 10 kt. Hazy. Waves around 1 ft. .SUNDAY NIGHT...Northeast winds 5 to 10 kt becoming east overnight. Hazy. Waves around 1 ft. .MONDAY...East winds 5 to 10 kt. Mostly sunny. Waves around 1 ft. $$ LMZ743>745-030330- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 312 PM CDT Sat Aug 2 2025 .TONIGHT...North winds 10 to 15 kt becoming southeast 5 to 10 kt overnight. Mostly clear. Waves 1 to 2 ft subsiding to around 1 ft. .SUNDAY...Southeast 5 to 10 kt becoming northeast in the afternoon. Hazy. Waves around 1 ft. .SUNDAY NIGHT...Northeast winds 5 to 10 kt becoming east overnight. Hazy. Waves around 1 ft. .MONDAY...East winds 5 to 10 kt becoming northeast in the afternoon. Mostly sunny in the morning, then becoming partly cloudy. Waves around 1 ft. $$ RC