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Detroit/Pontiac, MI Local Forecast Office

7NM S Grosse Ile MI

Marine Point Forecast

[NOTICE]

Today
High: 69 °F
SW 14kt
1ft
Tonight
Low: 51 °F
W 9kt
< 1ft
Friday
High: 62 °F
⇑SSE 6kt
< 1ft
Friday Night
Low: 50 °F
ESE 13kt
< 1ft
Saturday
High: 66 °F
WSW 17kt
2ft
Saturday Night
Low: 38 °F
WNW 14kt
1ft
Sunday
High: 50 °F
W 17kt
1ft
Sunday Night
Low: 32 °F
NW 15kt
< 1ft
Monday
High: 51 °F
NNW 10kt
< 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 Apr 16, 2026
Forecast Valid: 8am EDT Apr 16, 2026-6pm EDT Apr 22, 2026

View Nearby Observations

Detailed Forecast

Today

SW wind 11 to 14 kt. Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms between noon and 5pm, then showers likely and possibly a thunderstorm after 5pm. Waves around 1 ft.

Tonight

W wind 6 to 9 kt becoming N after midnight. A slight chance of showers before 9pm. Waves 1 ft or less.

Friday

Variable winds less than 5 kt becoming SSE around 6 kt in the afternoon. Partly sunny. Waves 1 ft or less.

Friday Night

ESE wind 10 to 13 kt. A chance of showers between 2am and 5am, then a chance of showers and thunderstorms after 5am. Waves 1 ft or less.

Saturday

S wind 15 to 17 kt becoming WSW in the afternoon. Winds could gust as high as 23 kt. A chance of showers and thunderstorms, then showers after 8am. Waves around 2 ft.

Saturday Night

WNW wind around 14 kt, with gusts as high as 21 kt. A chance of showers before 2am. Waves around 1 ft.

Sunday

W wind 13 to 17 kt, with gusts as high as 25 kt. Mostly sunny. Waves around 1 ft.

Sunday Night

NW wind 10 to 15 kt, with gusts as high as 21 kt. Partly cloudy. Waves 1 ft or less.

Monday

NNW wind around 10 kt becoming W in the afternoon. 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.