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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Overnight
Low: 69 °F
Light Wind
< 1ft
Wednesday
High: 75 °F
⇑NE 8kt
< 1ft
Wednesday Night
Low: 64 °F
NE 8kt⇓
< 1ft
Thursday
High: 78 °F
Light Wind
< 1ft
Thursday Night
Low: 61 °F
NE 6kt
< 1ft
Friday
High: 74 °F
ENE 9kt
< 1ft
Friday Night
Low: 60 °F
ENE 8kt
< 1ft
Saturday
High: 73 °F
SSE 10kt
< 1ft
Saturday Night
Low: 64 °F
SE 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: 9:49 pm EDT Sep 15, 2026
Forecast Valid: 11pm EDT Sep 15, 2026-6pm EDT Sep 22, 2026

View Nearby Observations

Detailed Forecast

Overnight

Variable winds 5 kt or less. Showers and possibly a thunderstorm. Waves 1 ft or less.

Wednesday

Variable winds less than 5 kt becoming NE 5 to 8 kt in the morning. A chance of showers and thunderstorms before 1pm, then a slight chance of showers between 1pm and 3pm. Waves 1 ft or less.

Wednesday Night

NE wind 5 to 8 kt becoming variable and less than 5 kt after midnight. A chance of showers after 2am. Waves 1 ft or less.

Thursday

Variable winds 5 kt or less. A chance of showers before 2pm. Waves 1 ft or less.

Thursday Night

NE wind around 6 kt. Mostly cloudy. Waves 1 ft or less.

Friday

ENE wind around 9 kt. Partly sunny. Waves 1 ft or less.

Friday Night

ENE wind 6 to 8 kt. Mostly cloudy. Waves 1 ft or less.

Saturday

SSE wind 7 to 10 kt. Showers and possibly a thunderstorm, mainly after 2pm. Waves 1 ft or less.

Saturday Night

SE wind around 9 kt becoming N after midnight. Showers and possibly a thunderstorm before 8pm, then 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.