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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Tonight
Low: 74 °F
WSW 9kt
< 1ft
Thursday
High: 89 °F
⇑SW 8kt
< 1ft
Thursday Night
Low: 71 °F
Light Wind
< 1ft
Friday
High: 82 °F
Light Wind
< 1ft
Friday Night
Low: 66 °F
ENE 6kt
< 1ft
Saturday
High: 78 °F
ENE 8kt
< 1ft
Saturday Night
Low: 62 °F
NE 7kt
< 1ft
Sunday
High: 78 °F
E 8kt
< 1ft
Sunday Night
Low: 63 °F
ESE 6kt⇓
< 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 2, 2026
Forecast Valid: 9pm EDT Sep 2, 2026-6pm EDT Sep 9, 2026

View Nearby Observations

Detailed Forecast

Tonight

WSW wind 6 to 9 kt. A chance of showers and thunderstorms, mainly after 3am. Waves 1 ft or less.

Thursday

Variable winds less than 5 kt becoming SW 5 to 8 kt in the morning. A slight chance of showers and thunderstorms before 10am, then a chance of showers and thunderstorms after 2pm. Waves 1 ft or less.

Thursday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms, then showers after midnight. Waves 1 ft or less.

Friday

Variable winds 5 kt or less. Showers, mainly before 2pm. Waves 1 ft or less.

Friday Night

ENE wind around 6 kt. A chance of showers before 8pm, then a chance of showers after 2am. Waves 1 ft or less.

Saturday

ENE wind 6 to 8 kt. A chance of showers before 8am. Waves 1 ft or less.

Saturday Night

NE wind 5 to 7 kt. Partly cloudy. Waves 1 ft or less.

Sunday

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

Sunday Night

ESE wind around 6 kt becoming variable and less than 5 kt after midnight. Partly cloudy. 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.