656
FZUS53 KLOT 281500
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
1000 AM CDT Thu Aug 28 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>742-282115-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
1000 AM CDT Thu Aug 28 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM CDT THIS AFTERNOON
THROUGH FRIDAY AFTERNOON...

.REST OF TODAY...Northwest winds 10 to 20 kt becoming north and
increasing to 20 to 25 kt this afternoon. A chance of showers and
thunderstorms in the afternoon with a slight chance of waterspouts.
Waves 1 to 3 ft through early afternoon then quickly building to
4 to 7 ft occasionally to 9 ft.
.TONIGHT...Northeast winds 20 to 25 kt gradually diminishing to 10
to 20 kt overnight. Mostly clear. Waves 5 to 8 ft occasionally to
10 ft.
.FRIDAY...Northeast winds 10 to 15 kt. Partly cloudy. Waves 4 to
7 ft occasionally to 9 ft subsiding to 2 to 4 ft by late
afternoon.
.FRIDAY NIGHT...Northeast winds 5 to 10 kt. Partly cloudy. Waves
1 to 3 ft.

$$

LMZ743>745-282115-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
1000 AM CDT Thu Aug 28 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM CDT THIS AFTERNOON
THROUGH FRIDAY MORNING...

.REST OF TODAY...Southwest winds 10 to 20 kt becoming west late
this morning and then north this afternoon and increasing to 20
to 25 kt late. A slight chance of showers and thunderstorms in the
afternoon with a slight chance of waterspouts. Slight chance of
waterspouts in the afternoon. Waves 1 to 3 ft through mid
afternoon then building to 3 to 5 ft late.
.TONIGHT...North winds 20 to 25 kt becoming northeast overnight.
Mostly clear. Waves building to 5 to 8 ft occasionally to 10 ft
and then subsiding to 4 to 6 ft occasionally to 8 ft late.
.FRIDAY...Northeast winds 10 to 15 kt. Partly cloudy. Waves 3 to
6 ft occasionally to 8 ft subsiding to 2 to 4 ft by late
afternoon.
.FRIDAY NIGHT...Northeast winds 10 to 15 kt becoming east 5 to
10 kt overnight. Mostly clear. Waves 1 to 2 ft.

$$

RC