National Weather Service Marine Forecast FZUS53 KLOT

FZUS53 KLOT 231957 CCA
NSHLOT

Nearshore Marine Forecast...CORRECTED
National Weather Service Chicago/Romeoville IL
257 PM CDT Mon Mar 23 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.

LMZ740>742-240315
Winthrop Harbor to Wilmette Harbor IL
Wilmette Harbor to Northerly Island IL
Northerly Island to Calumet Harbor IL
257 PM CDT Mon Mar 23 2026

LATE THIS AFTERNOON
Northeast winds 10 to 15 kt. Sunny. Waves 3 to 5 ft.

TONIGHT
Northeast winds 10 to 20 kt becoming south late. Clear in the evening, then becoming mostly cloudy. Waves 2 to 4 ft subsiding to 1 to 3 ft.

TUESDAY
South winds 15 to 20 kt diminishing to 10 to 15 kt. Mostly cloudy. Waves 1 to 3 ft.

TUESDAY NIGHT
Southeast winds around 10 kt becoming south. Mostly cloudy. Waves 1 to 2 ft.

WEDNESDAY
South winds 10 to 20 kt. Mostly cloudy. Waves 1 to 2 ft.

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LMZ743>745-240315
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN
Burns Harbor to Michigan City IN
257 PM CDT Mon Mar 23 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING

LATE THIS AFTERNOON
North winds 15 to 25 kt. Sunny. Waves 4 to 7 ft occasionally to 9 ft.

TONIGHT
Northeast winds 15 to 20 kt becoming south and diminishing to 10 to 15 kt. Mostly clear in the evening, then becoming partly cloudy. Waves 3 to 6 ft occasionally to 8 ft subsiding to 1 to 3 ft.

TUESDAY
South winds 10 to 15 kt becoming southeast. Partly cloudy in the morning, then becoming mostly cloudy. Waves 1 to 2 ft.

TUESDAY NIGHT
Southeast winds around 10 kt becoming south overnight. Mostly cloudy. Waves 1 to 2 ft.

WEDNESDAY
South winds 10 to 20 kt becoming southwest. Mostly cloudy. Waves 1 to 2 ft.

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Carlaw