


Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
571 FZUS53 KLOT 291408 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 908 AM CDT Fri Aug 29 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>742-292115- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 908 AM CDT Fri Aug 29 2025 .REST OF TODAY...Northeast winds 10 to 15 kt. Partly cloudy. Waves 2 to 4 ft subsiding to 1 to 3 ft. .TONIGHT...East winds 5 to 10 kt becoming northeast. Slight chance of showers overnight. Waves 1 to 2 ft. .SATURDAY...Southeast winds 5 to 10 kt becoming east in the afternoon. Partly cloudy. Waves around 1 ft. .SATURDAY NIGHT...East winds 5 to 10 kt. Partly cloudy in the evening then clearing. Waves around 1 ft. $$ LMZ743>745-292115- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 908 AM CDT Fri Aug 29 2025 .REST OF TODAY...Northeast winds 10 to 15 kt. Partly cloudy. Waves 2 to 4 ft subsiding to 1 to 3 ft. .TONIGHT...Northeast winds 5 to 10 kt becoming east overnight. Slight chance of showers overnight. Waves 1 to 2 ft. .SATURDAY...Southeast winds 5 to 10 kt becoming northeast in the afternoon. Partly cloudy in the morning then clearing. Waves around 1 ft. .SATURDAY NIGHT...Northeast winds 5 to 10 kt becoming east overnight. Mostly clear. Waves around 1 ft. $$ Borchardt