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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Saturday
High: 86 °F
WSW 12kt
< 1ft
Saturday Night
Low: 64 °F
W 9kt
< 1ft
Sunday
High: 84 °F
⇑S 9kt
< 1ft
Sunday Night
Low: 70 °F
SSW 8kt
< 1ft
Monday
High: 86 °F
WSW 10kt
< 1ft
Monday Night
Low: 69 °F
W 9kt
< 1ft
Tuesday
High: 82 °F
W 7kt
< 1ft
Tuesday Night
Low: 67 °F
N 6kt⇓
< 1ft
Wednesday
High: 82 °F
⇑S 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: 2:24 am EDT Aug 8, 2026
Forecast Valid: 2am EDT Aug 8, 2026-6pm EDT Aug 14, 2026

View Nearby Observations

Detailed Forecast

Saturday

WSW wind 8 to 12 kt, with gusts as high as 18 kt. A chance of showers and thunderstorms before 4pm, then a slight chance of showers and thunderstorms after 5pm. Waves 1 ft or less.

Saturday Night

W wind 5 to 9 kt becoming N after midnight. A slight chance of showers and thunderstorms before 7pm. Waves 1 ft or less.

Sunday

Variable winds less than 5 kt becoming S 5 to 9 kt in the afternoon. Sunny. Waves 1 ft or less.

Sunday Night

SSW wind around 8 kt. A chance of showers, then showers and possibly a thunderstorm after 2am. Waves 1 ft or less.

Monday

WSW wind around 10 kt. Showers and possibly a thunderstorm before 8am, then a chance of showers between 8am and 11am, then a chance of showers and thunderstorms after 11am. Waves 1 ft or less.

Monday Night

W wind 6 to 9 kt. Showers likely and possibly a thunderstorm. Waves 1 ft or less.

Tuesday

NW wind 5 to 7 kt becoming W in the morning. A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Waves 1 ft or less.

Tuesday Night

N wind around 6 kt becoming variable and less than 5 kt in the evening. Showers likely and possibly a thunderstorm before 8pm, then a chance of showers. Waves 1 ft or less.

Wednesday

Variable winds less than 5 kt becoming S around 6 kt in the morning. 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.