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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Tonight
Low: 74 °F
SW 8kt
< 1ft
Saturday
High: 91 °F
WSW 14kt
< 1ft
Saturday Night
Low: 66 °F
N 11kt
< 1ft
Sunday
High: 81 °F
N 7kt
< 1ft
Sunday Night
Low: 65 °F
ESE 7kt⇓
< 1ft
Monday
High: 84 °F
⇑SSW 10kt
< 1ft
Monday Night
Low: 71 °F
SSW 13kt
< 1ft
Tuesday
High: 86 °F
SW 14kt
< 1ft
Tuesday Night
Low: 64 °F
WNW 13kt
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 8:14 pm EDT Jul 17, 2026
Forecast Valid: 9pm EDT Jul 17, 2026-6pm EDT Jul 24, 2026

View Nearby Observations

Detailed Forecast

Tonight

SSE wind 6 to 8 kt becoming SW after midnight. Scattered showers and thunderstorms before 2am, then isolated showers. Widespread smoke, mainly before midnight. Waves 1 ft or less.

Saturday

WSW wind 10 to 14 kt, with gusts as high as 22 kt. A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 5pm, then a chance of showers and thunderstorms after 5pm. Waves 1 ft or less.

Saturday Night

N wind 8 to 11 kt. A chance of showers and thunderstorms before 7pm. Patchy smoke after 3am. Waves 1 ft or less.

Sunday

N wind around 7 kt. Patchy smoke before 8am. Waves 1 ft or less.

Sunday Night

ESE wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Mostly clear. Waves 1 ft or less.

Monday

Variable winds less than 5 kt becoming SSW 5 to 10 kt in the morning. Mostly sunny. Waves 1 ft or less.

Monday Night

SSW wind 10 to 13 kt, with gusts as high as 19 kt. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Waves 1 ft or less.

Tuesday

SW wind around 14 kt, with gusts as high as 21 kt. Showers and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms between 8am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Waves 1 ft or less.

Tuesday Night

WNW wind around 13 kt, with gusts as high as 19 kt. Showers likely before 8pm. 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.