518
FZUS53 KLOT 171805
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
1205 PM CST Mon Nov 17 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.

LMZ740-741-172215-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
1205 PM CST Mon Nov 17 2025

.REST OF TODAY...Northwest winds around 10 kt becoming east
around 5 kt this afternoon. Sunny late in the morning, then
becoming mostly cloudy. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.TONIGHT...East winds around 5 kt becoming southeast and
increasing to 10 to 20 kt. Chance of rain in the evening, then
rain overnight. Waves 1 to 2 ft building to 3 to 5 ft.
.TUESDAY...East winds 15 to 25 kt. Occasional rain and drizzle.
Waves 3 to 6 ft occasionally to 8 ft. A small craft advisory will
likely be needed.
.TUESDAY NIGHT...East winds 15 to 20 kt diminishing to 10 to
15 kt. Cloudy. Waves 3 to 6 ft occasionally to 8 ft.

$$

LMZ742-743-172215-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-
1205 PM CST Mon Nov 17 2025

.REST OF TODAY...Northwest winds around 10 kt becoming northeast
around 5 kt this afternoon. Mostly sunny late in the morning, then
becoming mostly cloudy. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.TONIGHT...East winds 10 to 20 kt becoming southeast overnight.
Chance of rain in the evening, then rain overnight. Waves 1 to 3
ft building to 2 to 4 ft late.
.TUESDAY...East winds 15 to 20 kt. Occasional rain and drizzle.
Waves 2 to 4 ft.
.TUESDAY NIGHT...East winds 15 to 20 kt diminishing to 10 to
15 kt. Cloudy. Waves 2 to 4 ft.


$$

LMZ744-745-172215-
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
1205 PM CST Mon Nov 17 2025

.REST OF TODAY...Northwest winds around 10 kt becoming north
around 5 kt this afternoon. Sunny late in the morning, then
becoming partly cloudy. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.TONIGHT...East winds 10 to 20 kt becoming southeast overnight.
Slight chance of rain in the evening, then rain overnight. Waves 1
to 3 ft.
.TUESDAY...East winds 15 to 20 kt. Occasional rain and drizzle.
Waves 1 to 3 ft.
.TUESDAY NIGHT...East winds 10 to 15 kt. Slight chance of rain in
the evening. Waves 1 to 3 ft.

$$
Yack