Chicago Weather

Marine Data

Below you'll find the latest marine forecast for our area. This forecast updates daily.

Wilmette Harbor To Northerly Island-

Northerly Island To Calumet Harbor-

Forecast as of 9:01 PM CDT on March 26, 2017

Dense fog advisory in effect until 9 am CDT Monday

Rest Of Tonight

Southwest winds around 10 kt becoming west after midnight. Areas of dense fog. Waves around 1 ft.


North winds 5 to 10 kt becoming northeast late in the morning...and then northeast 10 to 15 kt early in the afternoon. Patchy fog in the morning. Rain likely by mid afternoon. Waves around 1 ft building to 2 to 4 ft in the late afternoon.

Monday Night

North winds 15 to 20 kt increasing to 15 to 25 kt. Chance of rain in the evening. Waves 3 to 5 ft occasionally to 7 ft building to 4 to 7 ft occasionally to 9 ft after midnight. A Small Craft Advisory will likely be needed.


North winds 15 to 25 kt. Mostly cloudy in the morning then becoming partly cloudy. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 6 ft occasionally to 8 ft in the afternoon.


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