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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]
    • Tonight

      Tonight:SW wind 9 to 11 kt. A slight chance of showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 5am, then a chance of showers and thunderstorms after 5am.   Waves 1 ft or less.

      Low: 67 °F

      SW 11kt
      < 1ft

    • Wednesday

      Wednesday:W wind around 7 kt becoming NW in the afternoon. A chance of showers before 8am, then a slight chance of showers and thunderstorms after 5pm.   Waves 1 ft or less.

      High: 81 °F

      W 7kt
      < 1ft

    • Wednesday Night

      Wednesday Night:Variable winds 5 kt or less. Partly cloudy. Waves 1 ft or less.

      Low: 63 °F

      Light Wind
      < 1ft

    • Thursday

      Thursday:Variable winds 5 kt or less. Mostly sunny. Waves 1 ft or less.

      High: 81 °F

      Light Wind
      < 1ft

    • Thursday Night

      Thursday Night:SE wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Mostly clear. Waves 1 ft or less.

      Low: 63 °F

      SE 7kt⇓
      < 1ft

    • Friday

      Friday:Variable winds less than 5 kt becoming S 5 to 9 kt in the morning. Mostly sunny. Waves 1 ft or less.

      High: 81 °F

      ⇑S 9kt
      < 1ft

    • Friday Night

      Friday Night:SSE wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Waves 1 ft or less.

      Low: 65 °F

      SSE 7kt⇓
      < 1ft

    • Saturday

      Saturday:WSW wind 5 to 9 kt. A chance of showers, then showers likely and possibly a thunderstorm after 2pm.   Waves 1 ft or less.

      High: 80 °F

      WSW 9kt
      < 1ft

    • Saturday Night

      Saturday Night:NW wind around 7 kt. Showers likely and possibly a thunderstorm before 8pm.   Waves 1 ft or less.

      Low: 62 °F

      NW 7kt
      < 1ft


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 4:24 pm EDT Aug 18, 2026
Forecast Valid: 6pm EDT Aug 18, 2026-6pm EDT Aug 25, 2026

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Detailed Forecast

Tonight
SW wind 9 to 11 kt. A slight chance of showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 5am, then a chance of showers and thunderstorms after 5am. Waves 1 ft or less.
Wednesday
W wind around 7 kt becoming NW in the afternoon. A chance of showers before 8am, then a slight chance of showers and thunderstorms after 5pm. Waves 1 ft or less.
Wednesday Night
Variable winds 5 kt or less. Partly cloudy. Waves 1 ft or less.
Thursday
Variable winds 5 kt or less. Mostly sunny. Waves 1 ft or less.
Thursday Night
SE wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Mostly clear. Waves 1 ft or less.
Friday
Variable winds less than 5 kt becoming S 5 to 9 kt in the morning. Mostly sunny. Waves 1 ft or less.
Friday Night
SSE wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Waves 1 ft or less.
Saturday
WSW wind 5 to 9 kt. A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Waves 1 ft or less.
Saturday Night
NW wind around 7 kt. Showers likely and possibly a thunderstorm before 8pm. Waves 1 ft or less.



*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: 42.19°N 83.15°W
Last Update: 4:24 pm EDT Aug 18, 2026
Forecast Valid: 6pm EDT Aug 18, 2026-6pm EDT Aug 25, 2026
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