Nearshore Marine Forecast
Issued by NWS Chicago, IL

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403
FZUS53 KLOT 140318
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
918 PM CST Thu Nov 13 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>742-141015-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
918 PM CST Thu Nov 13 2025

.REST OF TONIGHT...South winds 10 to 20 kt. Mostly cloudy late
in the evening then clearing. Waves 1 to 2 ft.
.FRIDAY...Southwest winds 10 to 15 kt becoming south. Sunny.
Waves 1 to 2 ft.
.FRIDAY NIGHT...South winds 10 to 15 kt increasing to 15 to 20
kt. Partly cloudy in the evening, then becoming mostly cloudy.
Waves 1 to 2 ft building to 2 to 4 ft.
.SATURDAY...Southwest winds 15 to 20 kt becoming west in the
afternoon. Mostly cloudy in the morning, then becoming partly
cloudy. Waves 2 to 4 ft.

$$

LMZ743>745-141015-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
918 PM CST Thu Nov 13 2025

.REST OF TONIGHT...South winds 10 to 20 kt. Mostly cloudy late
in the evening then clearing. Waves 1 to 2 ft.
.FRIDAY...South winds 10 to 15 kt. Mostly sunny. Waves 1 to 2
ft.
.FRIDAY NIGHT...South winds 10 to 15 kt increasing to 15 to 20
kt. Partly cloudy in the evening, then becoming mostly cloudy.
Waves 1 to 3 ft.
.SATURDAY...Southwest winds around 20 kt becoming west in the
afternoon. Slight chance of rain in the afternoon. Waves 2 to
4 ft.

$$