


Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
462 FZUS53 KLOT 070218 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 918 PM CDT Mon Oct 6 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>742-070930- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 918 PM CDT Mon Oct 6 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 AM CDT TUESDAY THROUGH WEDNESDAY AFTERNOON... .REST OF TONIGHT...North winds 10 to 20 kt increasing to around 20 kt overnight. Showers and a chance of thunderstorms. Waves 2 to 4 ft building to 3 to 6 ft occasionally to 8 ft overnight. .TUESDAY...North winds 20 to 25 kt. Numerous showers early in the morning. Waves 4 to 7 ft occasionally to 9 ft. .TUESDAY NIGHT...North winds around 20 kt diminishing to 10 to 15 kt. Mostly clear. Waves 4 to 6 ft occasionally to 8 ft. .WEDNESDAY...Northeast winds around 20 kt diminishing to 10 to 15 kt. Mostly sunny. Waves 4 to 6 ft occasionally to 8 ft. $$ LMZ743>745-070930- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 918 PM CDT Mon Oct 6 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM CDT TUESDAY THROUGH WEDNESDAY MORNING... .REST OF TONIGHT...Southwest winds 10 to 15 kt becoming north around 20 kt overnight. Showers and a chance of thunderstorms. Waves 1 to 3 ft building to 3 to 6 ft occasionally to 8 ft late. .TUESDAY...North winds 20 to 25 kt. Showers and slight chance of thunderstorms in the morning. Waves 4 to 7 ft occasionally to 9 ft. .TUESDAY NIGHT...North winds around 20 kt. Mostly clear. Waves 4 to 7 ft occasionally to 9 ft. .WEDNESDAY...Northeast winds around 20 kt diminishing to around 15 kt. Sunny. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft. $$ KJB