


Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
257 FZUS53 KLOT 030846 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 346 AM CDT Sun Aug 3 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>742-031545- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 346 AM CDT Sun Aug 3 2025 .TODAY...Northeast winds 5 to 10 kt. Hazy and patchy smoke. Waves 1 to 2 ft. .TONIGHT...Northeast winds 5 to 10 kt becoming east overnight. Hazy and patchy smoke. Waves 1 to 2 ft. .MONDAY...East winds 5 to 10 kt. Mostly sunny in the morning, then becoming partly cloudy. Waves 1 to 2 ft. .MONDAY NIGHT...East winds 5 to 10 kt. Partly cloudy. Waves 1 to 2 ft. $$ LMZ743>745-031545- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 346 AM CDT Sun Aug 3 2025 .TODAY...East winds 5 to 10 kt becoming northeast in the afternoon. Hazy and patchy smoke. Waves 1 to 2 ft. .TONIGHT...Northeast winds 5 to 10 kt becoming east overnight. Hazy and patchy smoke. Waves 1 to 2 ft. .MONDAY...East winds 5 to 10 kt. Mostly sunny in the morning, then becoming partly cloudy. Waves 1 to 2 ft. .MONDAY NIGHT...East winds 5 to 10 kt. Partly cloudy. Waves 1 to 2 ft. $$ DK