Hazardous marine condition(s):
Hazardous Weather Outlook
LMZ740>742-091515-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
314 AM CDT Fri Oct 9 2026
TODAY
South winds 10 to 15 kt becoming southeast. Chance of
showers and slight chance of thunderstorms in the afternoon.
Waves 1 to 3 ft.
TONIGHT
Southeast winds 10 to 20 kt becoming south. Slight
chance of showers and thunderstorms in the evening. Waves
building to 2 to 4 ft.
SATURDAY
South winds 15 to 20 kt. Partly cloudy in the
morning, then becoming mostly cloudy. Waves 2 to 4 ft.
SATURDAY NIGHT
Southeast winds 10 to 15 kt. Mostly cloudy.
Waves 2 to 4 ft.
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