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Detroit/Pontiac, MI Local Forecast Office

7NM S Grosse Ile MI

Marine Point Forecast

[NOTICE]

This Afternoon
High: 24 °F
E 7kt
< 1ft
Tonight
Low: 19 °F
S 11kt
1-2ft
Tuesday
High: 34 °F
SSW 18kt
2-3ft

Small Craft Advisory
Tuesday Night
Low: 31 °F
SSW 26kt
2-4ft

Small Craft Advisory
Wednesday
High: 37 °F
SW 23kt
1-3ft

Small Craft Advisory
Wednesday Night
Low: 21 °F
NW 17kt
< 1ft

Small Craft Advisory
Thursday
High: 27 °F
W 12kt
< 1ft
Thursday Night
Low: 17 °F
W 10kt
< 1ft
Friday
High: 26 °F
WSW 14kt
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 4:13 pm EST Dec 8, 2025
Forecast Valid: 5pm EST Dec 8, 2025-6pm EST Dec 15, 2025

View Nearby Observations

Detailed Forecast

This Afternoon

E wind around 7 kt. Mostly cloudy. Waves 1 ft or less.

Tonight

E wind 6 to 11 kt becoming SSW after midnight. Winds could gust as high as 19 kt. Increasing clouds. Waves 1 to 2 ft.

Tuesday

SSW wind 13 to 18 kt, with gusts as high as 31 kt. Snow likely, mainly before 10am. Waves 2 to 3 ft.

Tuesday Night

SSW wind 16 to 26 kt, with gusts as high as 32 kt. Rain and snow, becoming all rain after 4am. Waves 2 to 4 ft.

Wednesday

SW wind 17 to 23 kt becoming WNW in the afternoon. Winds could gust as high as 32 kt. Rain before 10am, then rain and snow between 10am and 4pm, then a chance of snow after 4pm. Waves 1 to 3 ft.

Wednesday Night

NW wind 12 to 17 kt, with gusts as high as 24 kt. Mostly cloudy. Waves 1 ft or less.

Thursday

W wind around 12 kt. Partly sunny. Waves 1 ft or less.

Thursday Night

W wind around 10 kt. Mostly cloudy. Waves 1 ft or less.

Friday

WSW wind 10 to 14 kt. A chance of snow. 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.