Hazardous marine condition(s):
Hazardous Weather Outlook
LMZ740>742-252115-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
942 AM CDT Tue Aug 25 2026
REST OF TODAY
Southwest winds 5 to 10 kt becoming southeast 10
to 15 kt in the afternoon. Partly cloudy. Waves 1 to 3 ft.
TONIGHT
South winds 10 to 20 kt. Slight chance of showers
overnight. Waves 1 to 3 ft.
WEDNESDAY
Southwest winds 10 to 20 kt becoming west 10 to
15 kt in the afternoon. Slight chance of showers and
thunderstorms in the morning, then chance of showers and
thunderstorms in the afternoon. Waves 1 to 3 ft.
WEDNESDAY NIGHT
West winds 10 to 15 kt becoming northwest.
Mostly clear. Waves 1 to 2 ft.
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