Nearshore Marine Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
182 FZUS53 KLOT 062037 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 237 PM CST Thu Nov 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>742-070415- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 237 PM CST Thu Nov 6 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM CST THIS EVENING THROUGH LATE TONIGHT... .LATE THIS AFTERNOON...Southeast winds 10 to 20 kt. Mostly cloudy. Waves 2 to 4 ft. .TONIGHT...South winds to 30 kt with occasional gale force gusts to 35 kt, becoming southwest 20 to 25 kt late. Isolated showers in the evening, then showers and slight chance of thunderstorms after midnight. Waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft. .FRIDAY...West winds 15 to 25 kt. Isolated showers in the afternoon. Waves 2 to 4 ft subsiding to 1 to 3 ft late. .FRIDAY NIGHT...Northwest winds 10 to 15 kt becoming north overnight. Isolated showers in the evening, then slight chance of rain overnight. Waves 1 to 3 ft building to 2 to 4 ft. .SATURDAY...North winds 10 to 15 kt becoming northeast. Slight chance of showers in the morning, then rain in the afternoon. Waves 3 to 5 ft subsiding to 2 to 4 ft. $$ LMZ743>745-070415- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 237 PM CST Thu Nov 6 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM CST THIS EVENING THROUGH LATE TONIGHT... .LATE THIS AFTERNOON...South winds 10 to 15 kt. Mostly cloudy. Waves 1 to 2 ft. .TONIGHT...South winds to 30 kt with occasional gale force gusts to 35 kt, becoming southwest 20 to 25 kt late. Showers and slight chance of thunderstorms after midnight. Waves 1 to 3 ft building to 3 to 5 ft. .FRIDAY...Southwest winds around 20 kt becoming west. Isolated showers in the morning. Waves 2 to 4 ft. .FRIDAY NIGHT...Northwest winds 10 to 20 kt becoming north 10 to 15 kt overnight. Isolated showers in the evening, then slight chance of rain overnight. Waves 2 to 4 ft building to 3 to 5 ft. .SATURDAY...North winds 10 to 15 kt becoming northeast. Slight chance of showers in the morning, then rain likely in the afternoon. Waves 3 to 5 ft subsiding to 2 to 4 ft. $$ KJB