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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Today
High: 84 °F
E 7kt
< 1ft
Tonight
Low: 68 °F
NE 7kt
< 1ft
Saturday
High: 83 °F
ESE 8kt
< 1ft
Saturday Night
Low: 71 °F
ESE 8kt
< 1ft
Sunday
High: 85 °F
W 11kt
< 1ft
Sunday Night
Low: 69 °F
NW 9kt
< 1ft
Monday
High: 81 °F
NNW 8kt
< 1ft
Monday Night
Low: 63 °F
NNE 6kt⇓
< 1ft
Tuesday
High: 82 °F
⇑SW 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: 9:50 am EDT Aug 14, 2026
Forecast Valid: 10am EDT Aug 14, 2026-6pm EDT Aug 20, 2026

View Nearby Observations

Detailed Forecast

Today

E wind 5 to 7 kt. A slight chance of showers between 1pm and 2pm. Waves 1 ft or less.

Tonight

NE wind 5 to 7 kt. A slight chance of showers before 7pm. Waves 1 ft or less.

Saturday

ENE wind 5 to 8 kt becoming SE in the afternoon. Partly sunny. Waves 1 ft or less.

Saturday Night

ESE wind 6 to 8 kt. A chance of showers and thunderstorms before 7pm, then showers likely and possibly a thunderstorm between 7pm and 11pm, then showers likely after 11pm. Waves 1 ft or less.

Sunday

W wind 8 to 11 kt, with gusts as high as 18 kt. A chance of showers before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then showers likely after 5pm. Waves 1 ft or less.

Sunday Night

NW wind around 9 kt. Showers likely before 8pm. Waves 1 ft or less.

Monday

NNW wind around 8 kt. Mostly sunny. Waves 1 ft or less.

Monday Night

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

Tuesday

Variable winds less than 5 kt becoming SW around 6 kt 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.