886
FZUS53 KLOT 161959
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
259 PM CDT Thu Oct 16 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>742-170315-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
259 PM CDT Thu Oct 16 2025

.TONIGHT...East winds 10 to 15 kt becoming south 15 to 20 kt
during the evening and overnight. Slight chance of showers in the
evening. Waves 1 to 3 ft building to 2 to 4 ft.
.FRIDAY...South winds 15 to 25 kt. Mostly cloudy. Waves 2 to 4
ft.
.FRIDAY NIGHT...South winds 15 to 25 kt. Slight chance of showers
in the evening, then showers likely and slight chance of
thunderstorms overnight. Waves 2 to 4 ft.
.SATURDAY...Southwest winds 15 to 20 kt. Showers and a chance of
thunderstorms. Waves 1 to 3 ft. nshmkx

$$

LMZ743>745-170315-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
259 PM CDT Thu Oct 16 2025

.TONIGHT...East winds 10 to 15 kt becoming south 15 to 20 kt
during the evening and overnight. Slight chance of showers in the
evening. Waves 1 to 2 ft.
.FRIDAY...South winds 15 to 20 kt. Partly cloudy in the morning,
then becoming mostly cloudy. Waves 1 to 2 ft.
.FRIDAY NIGHT...South winds 15 to 25 kt. Chance of showers
overnight. Waves 1 to 3 ft.
.SATURDAY...Southwest winds 15 to 20 kt. Showers and a chance of
thunderstorms. Waves 1 to 3 ft.

$$