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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

This Afternoon
High: 82 °F
S 9kt
< 1ft
Tonight
Low: 65 °F
S 10kt
< 1ft
Monday
High: 87 °F
SSW 16kt
< 1ft
Monday Night
Low: 69 °F
SSW 13kt
< 1ft
Tuesday
High: 85 °F
SW 19kt
< 1ft
Tuesday Night
Low: 56 °F
SW 14kt
< 1ft
Wednesday
High: 65 °F
NNW 10kt
< 1ft
Wednesday Night
Low: 44 °F
NE 9kt
< 1ft
Thursday
High: 62 °F
ENE 8kt
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 3:49 pm EDT May 17, 2026
Forecast Valid: 3pm EDT May 17, 2026-6pm EDT May 23, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

S wind around 9 kt. Isolated showers and thunderstorms. Waves 1 ft or less.

Tonight

S wind 8 to 10 kt. Scattered showers and thunderstorms before 8pm, then isolated showers between 8pm and 9pm. Waves 1 ft or less.

Monday

SSW wind 10 to 16 kt, with gusts as high as 24 kt. A chance of thunderstorms after 5pm. Waves 1 ft or less.

Monday Night

SSW wind 10 to 13 kt, with gusts as high as 21 kt. A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 1am. Waves 1 ft or less.

Tuesday

SW wind 12 to 19 kt, with gusts as high as 27 kt. Showers and possibly a thunderstorm after 2pm. Waves 1 ft or less.

Tuesday Night

SW wind 11 to 14 kt becoming WNW after midnight. Winds could gust as high as 21 kt. Showers and possibly a thunderstorm. Waves 1 ft or less.

Wednesday

NNW wind around 10 kt. A chance of showers before 8am. Waves 1 ft or less.

Wednesday Night

NE wind around 9 kt. Partly cloudy. Waves 1 ft or less.

Thursday

ENE wind around 8 kt. Mostly sunny. 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.