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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Today
High: 80 °F
ENE 8kt
< 1ft
Tonight
Low: 63 °F
E 8kt⇓
< 1ft
Friday
High: 81 °F
⇑SSE 8kt
< 1ft
Friday Night
Low: 66 °F
SSE 7kt⇓
< 1ft
Saturday
High: 81 °F
⇑WSW 10kt
< 1ft
Saturday Night
Low: 62 °F
NW 9kt
< 1ft
Sunday
High: 78 °F
NW 11kt
< 1ft
Sunday Night
Low: 59 °F
NW 8kt
< 1ft
Monday
High: 78 °F
NW 8kt
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 9:24 am EDT Aug 20, 2026
Forecast Valid: 9am EDT Aug 20, 2026-6pm EDT Aug 26, 2026

View Nearby Observations

Detailed Forecast

Today

ENE wind around 8 kt. A slight chance of showers before 11am. Waves 1 ft or less.

Tonight

E 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 SSE 5 to 8 kt in the morning. Sunny. Waves 1 ft or less.

Friday Night

SSE wind 5 to 7 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Waves 1 ft or less.

Saturday

Variable winds less than 5 kt becoming WSW 5 to 10 kt in the morning. A chance of showers, then showers and possibly a thunderstorm after 2pm. Waves 1 ft or less.

Saturday Night

NW wind around 9 kt. Showers and possibly a thunderstorm before 8pm. Waves 1 ft or less.

Sunday

NW wind 9 to 11 kt, with gusts as high as 18 kt. Sunny. Waves 1 ft or less.

Sunday Night

NW wind 6 to 8 kt. Mostly clear. Waves 1 ft or less.

Monday

NW wind 6 to 8 kt. 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.