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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Tonight
Low: 68 °F
WSW 6kt⇓
< 1ft
Wednesday
High: 84 °F
⇑SW 7kt
< 1ft
Wednesday Night
Low: 68 °F
SW 6kt⇓
< 1ft
Thursday
High: 83 °F
Light Wind
< 1ft
Thursday Night
Low: 66 °F
E 6kt
< 1ft
Friday
High: 81 °F
NNE 8kt
< 1ft
Friday Night
Low: 61 °F
NE 9kt
< 1ft
Saturday
High: 79 °F
SE 9kt
< 1ft
Saturday Night
Low: 67 °F
SE 9kt
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 4:24 pm EDT Aug 11, 2026
Forecast Valid: 8pm EDT Aug 11, 2026-6pm EDT Aug 18, 2026

View Nearby Observations

Detailed Forecast

Tonight

WSW wind around 6 kt becoming variable and less than 5 kt in the evening. A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 1am. Patchy fog after 3am. Waves 1 ft or less.

Wednesday

Variable winds less than 5 kt becoming SW 5 to 7 kt in the afternoon. A slight chance of showers and thunderstorms after 5pm. Patchy fog before 7am. Waves 1 ft or less.

Wednesday Night

SW wind around 6 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Waves 1 ft or less.

Thursday

Variable winds 5 kt or less. A chance of showers after 2pm. Waves 1 ft or less.

Thursday Night

E wind around 6 kt becoming NNE in the evening. A chance of showers before 8pm. Waves 1 ft or less.

Friday

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

Friday Night

NE wind 6 to 9 kt. Partly cloudy. Waves 1 ft or less.

Saturday

ENE wind 6 to 9 kt becoming SE in the afternoon. Mostly sunny. Waves 1 ft or less.

Saturday Night

SE wind 7 to 9 kt. A chance of showers between 8pm and 2am, then a chance of showers and thunderstorms after 2am. 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.