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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Overnight
Low: 63 °F
Light Wind
< 1ft
Monday
High: 82 °F
⇑S 9kt
< 1ft
Monday Night
Low: 70 °F
S 12kt
< 1ft
Tuesday
High: 86 °F
SW 15kt
< 1ft
Tuesday Night
Low: 62 °F
NNW 13kt
< 1ft
Wednesday
High: 76 °F
NNW 13kt
< 1ft
Wednesday Night
Low: 58 °F
NNW 9kt⇓
< 1ft
Thursday
High: 79 °F
Light Wind
< 1ft
Thursday Night
Low: 62 °F
SSE 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: 9:35 pm EDT Jul 19, 2026
Forecast Valid: 11pm EDT Jul 19, 2026-6pm EDT Jul 26, 2026

View Nearby Observations

Detailed Forecast

Overnight

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

Monday

Variable winds less than 5 kt becoming S 5 to 9 kt in the morning. Patchy smoke. Waves 1 ft or less.

Monday Night

S wind 8 to 12 kt, with gusts as high as 18 kt. Showers likely, mainly after 5am. Patchy smoke. Waves 1 ft or less.

Tuesday

SW wind around 15 kt becoming W in the afternoon. Winds could gust as high as 22 kt. Showers likely, with thunderstorms also possible after 2pm. Waves 1 ft or less.

Tuesday Night

NNW wind 11 to 13 kt, with gusts as high as 19 kt. A chance of thunderstorms before 8pm. Waves 1 ft or less.

Wednesday

NNW wind around 13 kt, with gusts as high as 20 kt. Mostly sunny. Waves 1 ft or less.

Wednesday Night

NNW wind 5 to 9 kt becoming variable and less than 5 kt after midnight. Mostly clear. Waves 1 ft or less.

Thursday

Variable winds 5 kt or less. Sunny. Waves 1 ft or less.

Thursday Night

SSE wind around 6 kt becoming variable and less than 5 kt in the evening. Mostly clear. 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.