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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Today
High: 70 °F
ESE 8kt
< 1ft
Tonight
Low: 66 °F
E 7kt
< 1ft
Sunday
High: 70 °F
NNE 11kt
< 1ft
Sunday Night
Low: 55 °F
NNE 13kt
< 1ft
Monday
High: 64 °F
NE 13kt
< 1ft
Monday Night
Low: 52 °F
NE 15kt
< 1ft
Tuesday
High: 64 °F
ENE 16kt
< 1ft
Tuesday Night
Low: 54 °F
ENE 17kt
< 1ft
Wednesday
High: 64 °F
E 17kt
< 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 am EDT Sep 19, 2026
Forecast Valid: 6am EDT Sep 19, 2026-6pm EDT Sep 25, 2026

View Nearby Observations

Detailed Forecast

Today

NE wind 5 to 8 kt becoming SE in the afternoon. Showers likely, with thunderstorms also possible after 2pm. Waves 1 ft or less.

Tonight

E wind 5 to 7 kt. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 11pm. Some of the storms could produce heavy rainfall. Patchy fog after 1am. Waves 1 ft or less.

Sunday

NNE wind 7 to 11 kt. Showers likely before 1pm. Patchy fog before 11am. Waves 1 ft or less.

Sunday Night

NNE wind around 13 kt, with gusts as high as 20 kt. Mostly cloudy. Waves 1 ft or less.

Monday

NE wind around 13 kt, with gusts as high as 20 kt. Mostly cloudy. Waves 1 ft or less.

Monday Night

NE wind 12 to 15 kt, with gusts as high as 21 kt. Mostly cloudy. Waves 1 ft or less.

Tuesday

ENE wind around 16 kt, with gusts as high as 25 kt. Mostly cloudy. Waves 1 ft or less.

Tuesday Night

ENE wind around 17 kt, with gusts as high as 26 kt. A chance of showers. Waves 1 ft or less.

Wednesday

E wind 13 to 17 kt, with gusts as high as 23 kt. 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.