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Detroit/Pontiac, MI Local Forecast Office

7NM S Grosse Ile MI

Marine Point Forecast

[NOTICE]

This Afternoon
High: 75 °F
Light Wind
< 1ft
Tonight
Low: 62 °F
SSE 8kt⇓
< 1ft
Friday
High: 77 °F
⇑SE 7kt
< 1ft
Friday Night
Low: 63 °F
SE 6kt⇓
< 1ft
Saturday
High: 81 °F
⇑S 8kt
< 1ft
Saturday Night
Low: 67 °F
SW 6kt
< 1ft
Sunday
High: 85 °F
SW 7kt
< 1ft
Sunday Night
Low: 71 °F
S 8kt
< 1ft
Monday
High: 81 °F
SW 11kt
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 9:49 am EDT Jul 23, 2026
Forecast Valid: 2pm EDT Jul 23, 2026-6pm EDT Jul 29, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

Variable winds 5 kt or less. Sunny. Waves 1 ft or less.

Tonight

SSE wind 5 to 8 kt becoming variable and less than 5 kt after midnight. Mostly clear. Waves 1 ft or less.

Friday

Variable winds less than 5 kt becoming SE 5 to 7 kt in the afternoon. Mostly sunny. Waves 1 ft or less.

Friday Night

SE wind around 6 kt becoming variable and less than 5 kt in the evening. Mostly clear. Waves 1 ft or less.

Saturday

Variable winds less than 5 kt becoming S 5 to 8 kt in the afternoon. Sunny. Waves 1 ft or less.

Saturday Night

SW wind around 6 kt. Partly cloudy. Waves 1 ft or less.

Sunday

W wind 5 to 7 kt becoming SW in the afternoon. A chance of showers and thunderstorms after 2pm. Waves 1 ft or less.

Sunday Night

SW wind 6 to 8 kt becoming SSE in the evening. A chance of showers and thunderstorms before 8pm, then a chance of showers after 2am. Waves 1 ft or less.

Monday

SW wind 7 to 11 kt. A chance of showers before 8am, then a chance of showers and thunderstorms after 2pm. 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.