National Weather Service Marine Forecast FZUS53 KLOT

FZUS53 KLOT 011948
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
248 PM CDT Thu Oct 1 2026

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.

LMZ741-742-020600
Wilmette Harbor to Northerly Island IL
Northerly Island to Calumet Harbor IL
248 PM CDT Thu Oct 1 2026

SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY EVENING

LATE THIS AFTERNOON
Northwest winds 10 to 20 kt. Rain and slight chance of thunderstorms. Waves 1 to 3 ft.

TONIGHT
North winds 15 to 25 kt increasing to 20 to 25 kt. Rain, mostly in the evening. Waves 2 to 4 ft building to 3 to 6 ft occasionally to 8 ft.

FRIDAY
North winds 15 to 25 kt. Decreasing cloudiness. Waves 4 to 7 ft occasionally to 9 ft.

FRIDAY NIGHT
Northeast winds 10 to 20 kt becoming east overnight. Mostly clear. Waves 3 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft in the evening.

SATURDAY
East winds around 10 kt. Sunny. Waves 2 to 4 ft subsiding to 1 to 2 ft.

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LMZ743>745-020600
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN
Burns Harbor to Michigan City IN
248 PM CDT Thu Oct 1 2026

SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY EVENING

LATE THIS AFTERNOON
West winds 10 to 15 kt. Rain and slight chance of thunderstorms. Waves 1 to 2 ft.

TONIGHT
North winds 10 to 20 kt increasing to 20 to 25 kt. Rain and slight chance of thunderstorms in the evening, then chance of rain after midnight. Waves 2 to 4 ft building to 3 to 6 ft occasionally to 8 ft late.

FRIDAY
Northeast winds 15 to 25 kt becoming north. Decreasing cloudiness. Waves 4 to 7 ft occasionally to 9 ft.

FRIDAY NIGHT
Northeast winds 10 to 20 kt becoming east overnight. Mostly clear. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft in the evening.

SATURDAY
East winds around 10 kt. Sunny. Waves 1 to 3 ft.

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LMZ740-020600
Winthrop Harbor to Wilmette Harbor IL
248 PM CDT Thu Oct 1 2026

SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY EVENING

LATE THIS AFTERNOON
West winds 10 to 20 kt becoming northwest. Rain and slight chance of thunderstorms. Waves 1 to 2 ft.

TONIGHT
North winds 10 to 20 kt increasing to 20 to 25 kt. Rain in the evening. Waves 2 to 4 ft building to 3 to 6 ft occasionally to 8 ft.

FRIDAY
North winds 15 to 25 kt. Partly cloudy in the morning then clearing. Waves 4 to 7 ft occasionally to 9 ft.

FRIDAY NIGHT
Northeast winds 10 to 20 kt becoming east 10 to 15 kt overnight. Mostly clear. Waves 3 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft in the evening.

SATURDAY
East winds around 10 kt becoming southeast. Sunny. Waves 1 to 3 ft.

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DK