


Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
131 FZUS53 KLOT 060002 AAA NSHLOT Nearshore Marine Forecast...UPDATED National Weather Service Chicago/Romeoville IL 702 PM CDT Sun Oct 5 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>742-060330- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 702 PM CDT Sun Oct 5 2025 .TONIGHT...South winds 15 to 20 kt becoming southwest. Clear. Waves 2 to 4 ft subsiding to 1 to 3 ft. .MONDAY...Southwest winds 10 to 15 kt becoming east late. Chance of showers and slight chance of thunderstorms in the afternoon. Waves 1 to 3 ft. .MONDAY NIGHT...North winds 10 to 15 kt. Showers and a chance of thunderstorms in the evening, then showers and slight chance of thunderstorms overnight. Waves 1 to 2 ft building to 2 to 4 ft. .TUESDAY...North winds 15 to 25 kt. Chance of showers in the morning. Waves 3 to 5 ft. $$ LMZ743>745-060330- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 702 PM CDT Sun Oct 5 2025 .TONIGHT...South winds 15 to 20 kt. Clear. Waves 1 to 2 ft. .MONDAY...South winds 10 to 15 kt. Chance of showers and thunderstorms in the afternoon. Waves 1 to 2 ft. .MONDAY NIGHT...West winds 10 to 15 kt becoming northwest around 20 kt overnight. Showers and a chance of thunderstorms. Waves 1 to 2 ft building to 2 to 4 ft. .TUESDAY...North winds 15 to 25 kt. Chance of showers in the morning. Waves 3 to 6 ft. A small craft advisory will likely be needed. $$ Ratzer