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Detroit/Pontiac, MI Local Forecast Office

7NM S Grosse Ile MI

Marine Point Forecast

[NOTICE]

Wednesday
High: 82 °F
SW 14kt
1ft
Wednesday Night
Low: 71 °F
W 9kt
< 1ft
Thursday
High: 76 °F
WNW 7kt
< 1ft
Thursday Night
Low: 66 °F
NNE 7kt
< 1ft
Friday
High: 74 °F
SE 8kt
< 1ft
Friday Night
Low: 59 °F
ESE 11kt
< 1ft
Saturday
High: 76 °F
S 9kt
1ft
Saturday Night
Low: 66 °F
SSW 10kt
< 1ft
Sunday
High: 76 °F
W 9kt
< 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 Sep 8, 2026
Forecast Valid: 1am EDT Sep 9, 2026-6pm EDT Sep 15, 2026

View Nearby Observations

Detailed Forecast

Wednesday

SW wind 11 to 14 kt, with gusts as high as 20 kt. A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. A slight chance of waterspouts after 2pm. Waves around 1 ft.

Wednesday Night

W wind 6 to 9 kt. A chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 9pm. A slight chance of waterspouts before 8pm. Waves 1 ft or less.

Thursday

WNW wind 5 to 7 kt. Partly sunny. Waves 1 ft or less.

Thursday Night

NNE wind around 7 kt. Mostly clear. Waves 1 ft or less.

Friday

NE wind 5 to 8 kt becoming SE in the afternoon. Sunny. Waves 1 ft or less.

Friday Night

ESE wind 9 to 11 kt. Mostly clear. Waves 1 ft or less.

Saturday

S wind around 9 kt. Mostly sunny. Waves around 1 ft.

Saturday Night

S wind around 10 kt becoming SW after midnight. Partly cloudy. Waves 1 ft or less.

Sunday

W wind 7 to 9 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.