


Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
720 FZUS53 KLOT 091950 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 250 PM CDT Thu Oct 9 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>743-100315- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN- 250 PM CDT Thu Oct 9 2025 .TONIGHT...Southeast winds 10 to 15 kt becoming south 15 to 20 kt. Mostly clear. Waves 1 to 3 ft building to 2 to 4 ft. .FRIDAY...Southwest winds 15 to 25 kt. Isolated showers or sprinkles. Waves 2 to 4 ft. .FRIDAY NIGHT...West winds 15 to 20 kt becoming northwest 10 to 15 kt overnight. Slight chance of showers in the evening. Waves 1 to 3 ft building to 2 to 4 ft. .SATURDAY...Northwest winds 10 to 15 kt becoming north in the afternoon. Mostly sunny in the morning, then becoming partly cloudy. Waves 1 to 3 ft building to 2 to 4 ft. $$ LMZ744-745-100315- Gary to Burns Harbor IN-Burns Harbor to Michigan City IN- 250 PM CDT Thu Oct 9 2025 .TONIGHT...East winds 5 to 10 kt becoming south 10 to 15 kt late. Clear. Waves 1 to 2 ft. .FRIDAY...South winds 15 to 25 kt becoming southwest in the afternoon. Isolated showers or sprinkles in the afternoon. Waves 1 to 3 ft. .FRIDAY NIGHT...West winds 15 to 20 kt becoming northwest overnight. Chance of showers in the evening. Waves 2 to 4 ft building to 3 to 5 ft. .SATURDAY...North winds 10 to 20 kt. Slight chance of showers in the morning. Waves 3 to 5 ft subsiding to 2 to 4 ft. $$ Kluber