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Chicago, IL Local Forecast Office

17NM ENE Chicago IL

Marine Point Forecast

[NOTICE]
    • This Afternoon

      This Afternoon:Variable winds 5 kt or less. Mostly sunny. Waves around 1 ft.

      High: 40 °F

      Light Wind
      1ft

    • Tonight

      Tonight:S wind 10 to 20 kt increasing to 20 to 30 kt after midnight. Winds could gust as high as 45 kt. Rain likely, mainly before 2am.   Waves 1 ft building to 8 ft.

      Low: 41 °F

      ⇑S 30kt
      Waves Building8ft

      Storm Warning
      Storm Warning

    • Friday

      Friday:WSW wind 30 to 35 kt becoming WNW in the afternoon. Winds could gust as high as 45 kt. A chance of rain before 7am.   Waves 7 to 8 ft. occasionally to 10ft.

      High: 46 °F

      W 35kt
      7-8ft

      Storm Warning
      Storm Warning

    • Friday Night

      Friday Night:WNW wind 20 to 25 kt decreasing to 10 to 15 kt after midnight. Winds could gust as high as 30 kt. Mostly cloudy. Waves 6 ft subsiding to 3 ft.

      Low: 34 °F

      WNW 25kt⇓
      6ftWaves Subsiding

      Storm Warning
      Storm Warning

    • Saturday

      Saturday:N wind 5 to 10 kt becoming ESE in the afternoon. A slight chance of snow after 1pm.   Waves 1 to 2 ft.

      High: 38 °F

      N 10kt
      1-2ft

    • Saturday Night

      Saturday Night:E wind 10 to 20 kt. A chance of rain and snow before 10pm, then rain likely.   Waves 1 ft building to 4 ft.

      Low: 37 °F

      E 20kt
      Waves Building4ft

    • Sunday

      Sunday:ESE wind 20 to 30 kt becoming S in the afternoon. Rain likely, then rain and possibly a thunderstorm after 1pm.   Waves 4 to 5 ft.

      High: 48 °F

      S 30kt
      4-5ft

    • Sunday Night

      Sunday Night:W wind 30 to 35 kt becoming NNW 35 to 40 kt after midnight. Rain before 1am, then snow.  Widespread freezing spray after 3am.  Waves 6 ft building to 14 ft.

      Low: 24 °F

      ⇑NNW 40kt
      Waves Building14ft

    • Monday

      Monday:NW wind 35 to 40 kt. Snow likely.  Widespread freezing spray before 7am, then Widespread freezing spray after 8am.  Waves 15 ft subsiding to 9 ft.

      High: 30 °F

      NW 40kt
      15ftWaves Subsiding


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 2:27 pm CDT Mar 12, 2026
Forecast Valid: 4pm CDT Mar 12, 2026-6pm CDT Mar 19, 2026

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Detailed Forecast

This Afternoon
Variable winds 5 kt or less. Mostly sunny. Waves around 1 ft.
Tonight
S wind 10 to 20 kt increasing to 20 to 30 kt after midnight. Winds could gust as high as 45 kt. Rain likely, mainly before 2am. Waves 1 ft building to 8 ft.
Friday
WSW wind 30 to 35 kt becoming WNW in the afternoon. Winds could gust as high as 45 kt. A chance of rain before 7am. Waves 7 to 8 ft. occasionally to 10ft.
Friday Night
WNW wind 20 to 25 kt decreasing to 10 to 15 kt after midnight. Winds could gust as high as 30 kt. Mostly cloudy. Waves 6 ft subsiding to 3 ft.
Saturday
N wind 5 to 10 kt becoming ESE in the afternoon. A slight chance of snow after 1pm. Waves 1 to 2 ft.
Saturday Night
E wind 10 to 20 kt. A chance of rain and snow before 10pm, then rain likely. Waves 1 ft building to 4 ft.
Sunday
ESE wind 20 to 30 kt becoming S in the afternoon. Rain likely, then rain and possibly a thunderstorm after 1pm. Waves 4 to 5 ft.
Sunday Night
W wind 30 to 35 kt becoming NNW 35 to 40 kt after midnight. Rain before 1am, then snow. Widespread freezing spray after 3am. Waves 6 ft building to 14 ft.
Monday
NW wind 35 to 40 kt. Snow likely. Widespread freezing spray before 7am, then Widespread freezing spray after 8am. Waves 15 ft subsiding to 9 ft.

*Notices:

  1. This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
  2. The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.
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ABOUT THIS FORECAST

Point Forecast: 41.91°N 87.32°W
Last Update: 2:27 pm CDT Mar 12, 2026
Forecast Valid: 4pm CDT Mar 12, 2026-6pm CDT Mar 19, 2026
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