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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Friday
High: 89 °F
⇑SW 7kt
< 1ft
Friday Night
Low: 73 °F
S 7kt⇓
< 1ft
Saturday
High: 82 °F
E 8kt
< 1ft
Saturday Night
Low: 68 °F
ENE 9kt
< 1ft
Sunday
High: 79 °F
NNE 10kt
< 1ft
Sunday Night
Low: 62 °F
N 12kt
< 1ft
Monday
High: 81 °F
NE 9kt
< 1ft
Monday Night
Low: 64 °F
NE 8kt
< 1ft
Tuesday
High: 84 °F
E 7kt
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 3:47 am EDT Jul 31, 2026
Forecast Valid: 4am EDT Jul 31, 2026-6pm EDT Aug 6, 2026

View Nearby Observations

Detailed Forecast

Friday

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

Friday Night

S wind 5 to 7 kt becoming variable and less than 5 kt in the evening. A slight chance of showers before 4am, then a slight chance of showers and thunderstorms between 4am and 5am, then a chance of showers after 5am. Waves 1 ft or less.

Saturday

E wind 5 to 8 kt. A chance of showers before 4pm. Waves 1 ft or less.

Saturday Night

ENE wind around 9 kt. Showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 5am, then showers likely after 5am. Some of the storms could produce heavy rainfall. Waves 1 ft or less.

Sunday

NNE wind around 10 kt. Showers likely, then showers and possibly a thunderstorm after 8am. Waves 1 ft or less.

Sunday Night

N wind 8 to 12 kt. Showers likely before 8pm. Waves 1 ft or less.

Monday

NE wind around 9 kt. Mostly sunny. Waves 1 ft or less.

Monday Night

NE wind 5 to 8 kt. Partly cloudy. Waves 1 ft or less.

Tuesday

NNE wind 5 to 7 kt becoming E in the afternoon. 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.