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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Today
High: 70 °F
S 13kt
< 1ft
Tonight
Low: 51 °F
SW 8kt
< 1ft
Wednesday
High: 71 °F
Light Wind
< 1ft
Wednesday Night
Low: 49 °F
Light Wind
< 1ft
Thursday
High: 72 °F
⇑SSE 8kt
< 1ft
Thursday Night
Low: 56 °F
SE 7kt
< 1ft
Friday
High: 70 °F
SE 10kt
< 1ft
Friday Night
Low: 52 °F
SE 8kt
< 1ft
Saturday
High: 66 °F
N 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 am EDT Apr 21, 2026
Forecast Valid: 6am EDT Apr 21, 2026-6pm EDT Apr 27, 2026

View Nearby Observations

Detailed Forecast

Today

S wind 10 to 13 kt, with gusts as high as 21 kt. A chance of sprinkles before 11am, then a slight chance of showers after 4pm. Waves 1 ft or less.

Tonight

SW wind 5 to 8 kt becoming WNW in the evening. A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Waves 1 ft or less.

Wednesday

Variable winds 5 kt or less. Sunny. Waves 1 ft or less.

Wednesday Night

Variable winds 5 kt or less. Mostly clear. Waves 1 ft or less.

Thursday

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

Thursday Night

SE wind 5 to 7 kt. Partly cloudy. Waves 1 ft or less.

Friday

SE wind 6 to 10 kt. A chance of showers after 2pm. Waves 1 ft or less.

Friday Night

SE wind around 8 kt becoming ENE after midnight. Showers likely. Waves 1 ft or less.

Saturday

N wind 7 to 9 kt. A chance of showers. 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.