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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Tonight
Low: 60 °F
ENE 8kt
< 1ft
Monday
High: 73 °F
NNE 12kt
< 1ft
Monday Night
Low: 57 °F
N 9kt
< 1ft
Tuesday
High: 78 °F
NNW 6kt
< 1ft
Tuesday Night
Low: 59 °F
NNE 6kt⇓
< 1ft
Wednesday
High: 77 °F
⇑S 7kt
< 1ft
Wednesday Night
Low: 64 °F
SSE 6kt⇓
< 1ft
Thursday
High: 79 °F
SW 9kt
< 1ft
Thursday Night
Low: 61 °F
W 8kt⇓
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 4:25 pm EDT Jun 21, 2026
Forecast Valid: 10pm EDT Jun 21, 2026-6pm EDT Jun 28, 2026

View Nearby Observations

Detailed Forecast

Tonight

SE wind 6 to 8 kt becoming ENE after midnight. Showers, mainly after 11pm. Waves 1 ft or less.

Monday

NNE wind around 12 kt, with gusts as high as 18 kt. Showers likely, mainly before noon. Waves 1 ft or less.

Monday Night

N wind 6 to 9 kt. Mostly clear. Waves 1 ft or less.

Tuesday

NNW wind around 6 kt. Sunny. Waves 1 ft or less.

Tuesday Night

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

Wednesday

Variable winds less than 5 kt becoming S 5 to 7 kt in the afternoon. Mostly sunny. Waves 1 ft or less.

Wednesday Night

SSE wind around 6 kt becoming variable and less than 5 kt in the evening. A chance of showers between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Waves 1 ft or less.

Thursday

SW wind 5 to 9 kt. A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Waves 1 ft or less.

Thursday Night

W wind 5 to 8 kt becoming variable and less than 5 kt. A chance of thunderstorms 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.