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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

This Afternoon
High: 74 °F
NE 7kt
< 1ft
Tonight
Low: 64 °F
NE 8kt⇓
< 1ft
Thursday
High: 77 °F
Light Wind
< 1ft
Thursday Night
Low: 58 °F
NNE 6kt
< 1ft
Friday
High: 76 °F
NE 8kt
< 1ft
Friday Night
Low: 60 °F
ENE 9kt
< 1ft
Saturday
High: 73 °F
SE 10kt
< 1ft
Saturday Night
Low: 62 °F
ESE 10kt
< 1ft
Sunday
High: 71 °F
NNE 11kt
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 3:13 pm EDT Sep 16, 2026
Forecast Valid: 3pm EDT Sep 16, 2026-6pm EDT Sep 22, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

NE wind around 7 kt. Showers likely, with thunderstorms also possible after 5pm. Waves 1 ft or less.

Tonight

NE wind 5 to 8 kt becoming variable and less than 5 kt after midnight. A chance of showers and thunderstorms before 11pm, then showers likely between 11pm and 2am, then showers likely and possibly a thunderstorm after 2am. Waves 1 ft or less.

Thursday

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

Thursday Night

NNE wind around 6 kt. Cloudy during the early evening, then gradual clearing. Waves 1 ft or less.

Friday

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

Friday Night

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

Saturday

SE wind 7 to 10 kt. Showers likely, then showers and possibly a thunderstorm after 2pm. Waves 1 ft or less.

Saturday Night

ESE wind 8 to 10 kt. Showers and possibly a thunderstorm before 2am, then showers likely. Waves 1 ft or less.

Sunday

NNW wind around 11 kt becoming NNE in the afternoon. Showers likely. 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.