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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Today
High: 85 °F
⇑S 9kt
< 1ft
Tonight
Low: 70 °F
WSW 9kt
< 1ft
Monday
High: 85 °F
W 9kt
< 1ft
Monday Night
Low: 68 °F
Light Wind
< 1ft
Tuesday
High: 83 °F
⇑SW 6kt
< 1ft
Tuesday Night
Low: 67 °F
NW 6kt⇓
< 1ft
Wednesday
High: 83 °F
⇑WNW 7kt
< 1ft
Wednesday Night
Low: 66 °F
NW 6kt
< 1ft
Thursday
High: 81 °F
NW 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 am EDT Aug 9, 2026
Forecast Valid: 5am EDT Aug 9, 2026-6pm EDT Aug 15, 2026

View Nearby Observations

Detailed Forecast

Today

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

Tonight

WSW wind 7 to 9 kt. A chance of showers and thunderstorms before midnight, then showers likely and possibly a thunderstorm between midnight and 4am, then a chance of showers and thunderstorms after 4am. Waves 1 ft or less.

Monday

W wind around 9 kt. A chance of showers before 8am. Waves 1 ft or less.

Monday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms. Waves 1 ft or less.

Tuesday

Variable winds less than 5 kt becoming SW around 6 kt in the morning. Showers likely, with thunderstorms also possible after 5pm. Waves 1 ft or less.

Tuesday Night

NW 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 between 8pm and 2am. Waves 1 ft or less.

Wednesday

Variable winds less than 5 kt becoming WNW 5 to 7 kt in the morning. A chance of showers and thunderstorms after 2pm. Waves 1 ft or less.

Wednesday Night

NW wind around 6 kt. A chance of showers and thunderstorms before 8pm. Waves 1 ft or less.

Thursday

NW wind 6 to 8 kt. Mostly sunny. 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.