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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Overnight
Low: 70 °F
Light Wind
< 1ft
Friday
High: 83 °F
E 7kt
< 1ft
Friday Night
Low: 68 °F
NE 7kt
< 1ft
Saturday
High: 82 °F
ESE 9kt
< 1ft
Saturday Night
Low: 71 °F
ESE 9kt
< 1ft
Sunday
High: 85 °F
W 11kt
< 1ft
Sunday Night
Low: 68 °F
NW 8kt
< 1ft
Monday
High: 81 °F
NNW 7kt
< 1ft
Monday Night
Low: 63 °F
Light Wind
< 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 13, 2026
Forecast Valid: 11pm EDT Aug 13, 2026-6pm EDT Aug 20, 2026

View Nearby Observations

Detailed Forecast

Overnight

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

Friday

SE wind 5 to 7 kt becoming ENE in the morning. A slight chance of showers, mainly between 8am and 9am. Waves 1 ft or less.

Friday Night

NE wind 5 to 7 kt. Partly cloudy. Waves 1 ft or less.

Saturday

ENE wind 6 to 9 kt becoming ESE in the afternoon. A chance of showers after 2pm. Waves 1 ft or less.

Saturday Night

ESE wind around 9 kt becoming S after midnight. A chance of showers before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then showers likely after 2am. Waves 1 ft or less.

Sunday

W wind 9 to 11 kt. A chance of showers, with thunderstorms also possible after 2pm. Waves 1 ft or less.

Sunday Night

NW wind 6 to 8 kt. A chance of thunderstorms before 8pm. Waves 1 ft or less.

Monday

NNW wind around 7 kt. Mostly sunny. Waves 1 ft or less.

Monday Night

Variable winds 5 kt or less. Mostly clear. 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.