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Detroit/Pontiac, MI Local Forecast Office

3NM N Grosse Ile MI

Marine Point Forecast

[NOTICE]

Today
High: 82 °F
⇑SSW 6kt
< 1ft
Tonight
Low: 68 °F
Light Wind
< 1ft
Saturday
High: 78 °F
NE 9kt
< 1ft
Saturday Night
Low: 62 °F
NE 9kt
< 1ft
Sunday
High: 78 °F
ENE 9kt
< 1ft
Sunday Night
Low: 61 °F
ENE 7kt
< 1ft
Labor Day
High: 79 °F
⇑ENE 6kt
< 1ft
Monday Night
Low: 64 °F
Light Wind
< 1ft
Tuesday
High: 80 °F
⇑SSE 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: 4:24 am EDT Sep 4, 2026
Forecast Valid: 9am EDT Sep 4, 2026-6pm EDT Sep 10, 2026

View Nearby Observations

Detailed Forecast

Today

Variable winds less than 5 kt becoming SSW around 6 kt in the afternoon. Showers and thunderstorms, mainly before 1pm. Areas of fog before 2pm. Waves 1 ft or less.

Tonight

Variable winds 5 kt or less. A chance of showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then a chance of showers and thunderstorms after 4am. Waves 1 ft or less.

Saturday

NE wind 6 to 9 kt. A chance of showers before 7am. Waves 1 ft or less.

Saturday Night

NE wind 6 to 9 kt. Mostly cloudy during the early evening, then gradual clearing. Waves 1 ft or less.

Sunday

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

Sunday Night

ENE wind 5 to 7 kt. Mostly clear. Waves 1 ft or less.

Labor Day

Variable winds less than 5 kt becoming ENE around 6 kt in the morning. Mostly sunny. Waves 1 ft or less.

Monday Night

Variable winds 5 kt or less. Partly cloudy. Waves 1 ft or less.

Tuesday

Variable winds less than 5 kt becoming SSE 5 to 8 kt in the morning. Partly sunny. 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.