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Detroit/Pontiac, MI Local Forecast Office

4NM S Monroe MI

Marine Point Forecast

[NOTICE]

Thursday
High: 68 °F
ENE 10kt
< 1ft
Thursday Night
Low: 63 °F
SW 17kt
< 1ft
Friday
High: 59 °F
WNW 19kt
< 1ft
Friday Night
Low: 40 °F
N 19kt
< 1ft
Saturday
High: 52 °F
N 12kt
< 1ft
Saturday Night
Low: 39 °F
WSW 8kt
< 1ft
Sunday
High: 60 °F
SW 11kt
< 1ft
Sunday Night
Low: 42 °F
SSW 8kt
< 1ft
Monday
High: 64 °F
SW 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 Oct 15, 2026
Forecast Valid: 4am EDT Oct 15, 2026-6pm EDT Oct 21, 2026

View Nearby Observations

Detailed Forecast

Thursday

ENE wind around 10 kt. Partly sunny. Waves 1 ft or less.

Thursday Night

ESE wind 10 to 17 kt becoming SW after midnight. Winds could gust as high as 29 kt. Rain and thunderstorms before 3am, then rain likely. Waves 1 ft or less.

Friday

WNW wind 15 to 19 kt, with gusts as high as 27 kt. Rain likely, mainly after 5pm. Waves 1 ft or less.

Friday Night

N wind 17 to 19 kt, with gusts as high as 31 kt. A chance of rain before 8pm. Waves 1 ft or less.

Saturday

N wind 5 to 12 kt, with gusts as high as 20 kt. Sunny. Waves 1 ft or less.

Saturday Night

WSW wind 5 to 8 kt. Clear. Waves 1 ft or less.

Sunday

SW wind 8 to 11 kt. Sunny. Waves 1 ft or less.

Sunday Night

SSW wind around 8 kt. Mostly clear. Waves 1 ft or less.

Monday

SW wind around 8 kt. Sunny. Waves 1 ft or less.

See Lake Erie Open Lake Forecast for days 3 through 5.

The water temperature at Belle Isle is 65 degrees.

*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.