Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
935 FZUS53 KLOT 131507 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 907 AM CST Thu Nov 13 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>742-132215- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 907 AM CST Thu Nov 13 2025 .REST OF TODAY...West winds 10 to 15 kt becoming southwest early in the afternoon. Mostly sunny in the morning, then becoming partly cloudy in the afternoon. Waves 1 to 2 ft. .TONIGHT...Southwest winds around 10 kt becoming south. Mostly cloudy in the evening then clearing. Waves 1 to 2 ft. .FRIDAY...South winds around 10 kt. Sunny. Waves 1 to 2 ft. .FRIDAY NIGHT...South winds 10 to 15 kt. Partly cloudy in the evening, then becoming mostly cloudy. Waves 1 to 3 ft building to 2 to 4 ft. $$ LMZ743>745-132215- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 907 AM CST Thu Nov 13 2025 .REST OF TODAY...West winds 10 to 20 kt becoming southwest and diminishing to around 10 kt this afternoon. Mostly sunny. Waves 3 to 5 ft subsiding to 1 to 3 ft in the afternoon. .TONIGHT...South winds around 10 kt. Partly cloudy. Waves 1 to 2 ft. .FRIDAY...South winds around 10 kt. Mostly sunny. Waves around 1 ft. .FRIDAY NIGHT...South winds 10 to 15 kt increasing to 15 to 20 kt. Partly cloudy in the evening, then becoming mostly cloudy. Waves 1 to 3 ft. $$ KJB