


Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
706 FZUS53 KLOT 120203 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 903 PM CDT Sat Oct 11 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>742-120945- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 903 PM CDT Sat Oct 11 2025 .REST OF TONIGHT...East winds 10 to 20 kt becoming southeast 10 to 15 kt late. Mostly cloudy this evening, then becoming partly cloudy late. Waves 3 to 5 ft subsiding to 2 to 4 ft late. .SUNDAY...Southeast winds 10 to 20 kt. Mostly sunny. Waves 2 to 4 ft. .SUNDAY NIGHT...Southeast winds 10 to 20 kt becoming south 10 to 15 kt overnight. Mostly clear in the evening, then becoming partly cloudy. Waves 2 to 4 ft. .MONDAY...South winds around 10 kt. Mostly cloudy. Waves 2 to 4 ft subsiding to 1 to 2 ft. $$ LMZ743>745-120945- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 903 PM CDT Sat Oct 11 2025 .REST OF TONIGHT...Northeast winds 10 to 15 kt becoming southeast late. Partly cloudy in the evening, then becoming mostly clear. Waves 2 to 4 ft. .SUNDAY...Southeast winds 10 to 15 kt becoming east in the afternoon. Sunny. Waves 1 to 3 ft. .SUNDAY NIGHT...East winds 10 to 15 kt becoming southeast overnight. Mostly clear. Waves 1 to 2 ft. .MONDAY...South winds around 10 kt becoming southeast. Partly cloudy. Waves 1 ft or less. $$ Ratzer