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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Sunday
High: 81 °F
S 9kt
< 1ft
Sunday Night
Low: 71 °F
SSE 6kt
< 1ft
Monday
High: 88 °F
SW 9kt
< 1ft
Monday Night
Low: 75 °F
SW 9kt
< 1ft
Tuesday
High: 91 °F
WSW 8kt
< 1ft
Tuesday Night
Low: 75 °F
SW 7kt
< 1ft
Wednesday
High: 92 °F
WSW 11kt
< 1ft
Wednesday Night
Low: 73 °F
WSW 9kt
< 1ft
Thursday
High: 86 °F
W 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: 2:24 am EDT Aug 30, 2026
Forecast Valid: 4am EDT Aug 30, 2026-6pm EDT Sep 5, 2026

View Nearby Observations

Detailed Forecast

Sunday

S wind 5 to 9 kt. A chance of showers before 3pm, then a chance of showers after 4pm. Waves 1 ft or less.

Sunday Night

SSE wind around 6 kt becoming SSW after midnight. A chance of showers and thunderstorms, mainly before 4am, then a slight chance of thunderstorms after 5am. Waves 1 ft or less.

Monday

SW wind 6 to 9 kt. Mostly cloudy. Waves 1 ft or less.

Monday Night

SW wind around 9 kt. Mostly cloudy. Waves 1 ft or less.

Tuesday

WSW wind around 8 kt. Partly sunny. Waves 1 ft or less.

Tuesday Night

SW wind 5 to 7 kt. Mostly cloudy. Waves 1 ft or less.

Wednesday

WSW wind 6 to 11 kt. Mostly sunny. Waves 1 ft or less.

Wednesday Night

WSW wind 6 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.

Thursday

W wind 5 to 8 kt. A chance of thunderstorms before 8am, then a chance of showers after 2pm. 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.