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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Overnight
Low: 71 °F
Light Wind
< 1ft
Friday
High: 84 °F
⇑S 8kt
< 1ft
Friday Night
Low: 71 °F
SW 7kt
< 1ft
Saturday
High: 85 °F
WSW 10kt
< 1ft
Saturday Night
Low: 65 °F
W 9kt
< 1ft
Sunday
High: 84 °F
⇑SSW 10kt
< 1ft
Sunday Night
Low: 69 °F
SW 9kt
< 1ft
Monday
High: 85 °F
SW 10kt
< 1ft
Monday Night
Low: 70 °F
SW 11kt
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 9:50 pm EDT Aug 6, 2026
Forecast Valid: 12am EDT Aug 7, 2026-6pm EDT Aug 13, 2026

View Nearby Observations

Detailed Forecast

Overnight

Variable winds 5 kt or less. A chance of showers, with thunderstorms also possible after 5am. Waves 1 ft or less.

Friday

Variable winds less than 5 kt becoming S 5 to 8 kt in the morning. A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 11am, then a chance of showers and thunderstorms after 11am. Waves 1 ft or less.

Friday Night

SW wind around 7 kt. A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Waves 1 ft or less.

Saturday

WSW wind 8 to 10 kt. A chance of showers before 2pm, then a chance of showers and thunderstorms between 2pm and 5pm, then a chance of showers after 5pm. Waves 1 ft or less.

Saturday Night

W wind 5 to 9 kt becoming NW after midnight. Mostly clear. Waves 1 ft or less.

Sunday

Variable winds less than 5 kt becoming SSW 5 to 10 kt in the morning. Mostly sunny. Waves 1 ft or less.

Sunday Night

SW wind 6 to 9 kt. A chance of showers and thunderstorms after 8pm. Waves 1 ft or less.

Monday

SW wind 6 to 10 kt. A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Waves 1 ft or less.

Monday Night

SW wind around 11 kt. Showers and possibly a thunderstorm before 2am, then showers likely. 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.