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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Monday
High: 72 °F
N 6kt⇓
< 1ft
Monday Night
Low: 60 °F
SE 10kt
< 1ft
Tuesday
High: 83 °F
SSW 14kt
< 1ft
Tuesday Night
Low: 67 °F
SW 7kt⇓
< 1ft
Wednesday
High: 77 °F
NE 8kt
< 1ft
Wednesday Night
Low: 66 °F
NE 7kt
< 1ft
Thursday
High: 80 °F
NW 8kt
< 1ft
Thursday Night
Low: 64 °F
NNE 7kt
< 1ft
Friday
High: 77 °F
ENE 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: 3:13 am EDT Sep 14, 2026
Forecast Valid: 4am EDT Sep 14, 2026-6pm EDT Sep 20, 2026

View Nearby Observations

Detailed Forecast

Monday

N wind around 6 kt becoming variable and less than 5 kt in the afternoon. Sunny. Waves 1 ft or less.

Monday Night

SE wind 6 to 10 kt. Increasing clouds. Waves 1 ft or less.

Tuesday

SSW wind 12 to 14 kt, with gusts as high as 20 kt. Partly sunny. Waves 1 ft or less.

Tuesday Night

SW wind 5 to 7 kt becoming variable and less than 5 kt in the evening. Showers likely and possibly a thunderstorm, then showers after 11pm. Waves 1 ft or less.

Wednesday

NE wind 6 to 8 kt. Showers, mainly before 8am. Waves 1 ft or less.

Wednesday Night

NE wind 5 to 7 kt. A chance of showers after 2am. Waves 1 ft or less.

Thursday

NW wind around 8 kt. Showers likely, mainly between 8am and 2pm. Waves 1 ft or less.

Thursday Night

NNE wind around 7 kt. A chance of showers. Waves 1 ft or less.

Friday

ENE wind around 7 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.