News Headlines

For More Weather Information:

Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Tonight
Low: 62 °F
E 7kt⇓
< 1ft
Friday
High: 80 °F
⇑SSE 8kt
< 1ft
Friday Night
Low: 66 °F
SE 7kt⇓
< 1ft
Saturday
High: 79 °F
⇑SW 9kt
< 1ft
Saturday Night
Low: 61 °F
NW 9kt
< 1ft
Sunday
High: 76 °F
NW 12kt
< 1ft
Sunday Night
Low: 58 °F
NW 9kt
< 1ft
Monday
High: 77 °F
WNW 9kt
< 1ft
Monday Night
Low: 59 °F
W 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: 4:24 pm EDT Aug 20, 2026
Forecast Valid: 9pm EDT Aug 20, 2026-6pm EDT Aug 27, 2026

View Nearby Observations

Detailed Forecast

Tonight

E wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Mostly clear. Waves 1 ft or less.

Friday

Variable winds less than 5 kt becoming SSE 5 to 8 kt in the morning. Mostly sunny. Waves 1 ft or less.

Friday Night

SE wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Partly cloudy. Waves 1 ft or less.

Saturday

Variable winds less than 5 kt becoming SW 5 to 9 kt in the morning. A chance of showers, then showers and possibly a thunderstorm after 2pm. Waves 1 ft or less.

Saturday Night

NW wind around 9 kt. Showers and possibly a thunderstorm before 8pm. Waves 1 ft or less.

Sunday

NW wind around 12 kt, with gusts as high as 18 kt. Partly sunny. Waves 1 ft or less.

Sunday Night

NW wind 7 to 9 kt. Mostly clear. Waves 1 ft or less.

Monday

WNW wind 7 to 9 kt. Sunny. Waves 1 ft or less.

Monday Night

W wind around 6 kt becoming variable and less than 5 kt in the evening. Partly cloudy. 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.