Nearshore Marine Forecast
Issued by NWS Chicago, IL

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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