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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Tonight
Low: 69 °F
NE 9kt
< 1ft
Sunday
High: 78 °F
NE 11kt
< 1ft
Sunday Night
Low: 64 °F
N 12kt
< 1ft
Monday
High: 81 °F
NNE 10kt
< 1ft
Monday Night
Low: 64 °F
NE 9kt
< 1ft
Tuesday
High: 83 °F
E 7kt
< 1ft
Tuesday Night
Low: 67 °F
SE 7kt⇓
< 1ft
Wednesday
High: 85 °F
⇑SSW 8kt
< 1ft
Wednesday Night
Low: 68 °F
SSW 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 1, 2026
Forecast Valid: 8pm EDT Aug 1, 2026-6pm EDT Aug 8, 2026

View Nearby Observations

Detailed Forecast

Tonight

NE wind 7 to 9 kt. A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 11pm. Waves 1 ft or less.

Sunday

NE wind 8 to 11 kt, with gusts as high as 18 kt. Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. Waves 1 ft or less.

Sunday Night

N wind 9 to 12 kt, with gusts as high as 18 kt. A chance of showers and thunderstorms before 8pm. Waves 1 ft or less.

Monday

NNE wind around 10 kt. Cloudy through mid morning, then gradual clearing. Waves 1 ft or less.

Monday Night

NE wind 5 to 9 kt. Mostly clear. Waves 1 ft or less.

Tuesday

NNE wind 5 to 7 kt becoming E in the afternoon. Sunny. Waves 1 ft or less.

Tuesday Night

SE 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. Mostly sunny. Waves 1 ft or less.

Wednesday Night

SSW wind 5 to 7 kt becoming W after midnight. A chance of showers. 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.