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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Tonight
Low: 62 °F
Light Wind
< 1ft
Tuesday
High: 82 °F
⇑S 8kt
< 1ft
Tuesday Night
Low: 64 °F
SSE 7kt⇓
< 1ft
Wednesday
High: 85 °F
⇑SSW 8kt
< 1ft
Wednesday Night
Low: 68 °F
S 7kt⇓
< 1ft
Thursday
High: 82 °F
⇑SW 8kt
< 1ft
Thursday Night
Low: 66 °F
Light Wind
< 1ft
Friday
High: 83 °F
Light Wind
< 1ft
Friday Night
Low: 67 °F
SSW 6kt⇓
< 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 3, 2026
Forecast Valid: 9pm EDT Aug 3, 2026-6pm EDT Aug 10, 2026

View Nearby Observations

Detailed Forecast

Tonight

Variable winds 5 kt or less. Mostly clear. Waves 1 ft or less.

Tuesday

Variable winds less than 5 kt becoming S 5 to 8 kt in the afternoon. Sunny. Waves 1 ft or less.

Tuesday Night

SSE wind 5 to 7 kt becoming variable and less than 5 kt in the evening. Mostly clear. Waves 1 ft or less.

Wednesday

Variable winds less than 5 kt becoming SSW 5 to 8 kt in the afternoon. Sunny. Waves 1 ft or less.

Wednesday Night

S wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Waves 1 ft or less.

Thursday

Variable winds less than 5 kt becoming SW 5 to 8 kt in the afternoon. A chance of showers, with thunderstorms also possible after 2pm. Waves 1 ft or less.

Thursday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms before 2am. Waves 1 ft or less.

Friday

Variable winds 5 kt or less. Partly sunny. Waves 1 ft or less.

Friday Night

SSW wind around 6 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Waves 1 ft or less.

*Notices:

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.
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.