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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

This Afternoon
High: 82 °F
⇑SSE 7kt
< 1ft
Tonight
Low: 71 °F
ESE 7kt
< 1ft
Sunday
High: 85 °F
WSW 10kt
< 1ft
Sunday Night
Low: 69 °F
NW 8kt
< 1ft
Monday
High: 82 °F
NNW 8kt
< 1ft
Monday Night
Low: 63 °F
Light Wind
< 1ft
Tuesday
High: 83 °F
⇑SW 9kt
< 1ft
Tuesday Night
Low: 67 °F
SSW 8kt
< 1ft
Wednesday
High: 81 °F
SW 12kt
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 10:13 am EDT Aug 15, 2026
Forecast Valid: 1pm EDT Aug 15, 2026-6pm EDT Aug 21, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

Variable winds less than 5 kt becoming SSE 5 to 7 kt. Mostly cloudy. Waves 1 ft or less.

Tonight

ESE wind 5 to 7 kt. Scattered showers before 2am. Waves 1 ft or less.

Sunday

WSW wind 5 to 10 kt. Showers likely and possibly a thunderstorm between 2pm and 3pm, then a chance of showers and thunderstorms after 3pm. Waves 1 ft or less.

Sunday Night

NW wind around 8 kt. Partly cloudy. Waves 1 ft or less.

Monday

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

Monday Night

Variable winds 5 kt or less. Mostly clear. Waves 1 ft or less.

Tuesday

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

Tuesday Night

SSW wind 6 to 8 kt. A chance of showers. Waves 1 ft or less.

Wednesday

SW wind 9 to 12 kt, with gusts as high as 18 kt. A chance of showers, with thunderstorms also possible 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.