Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

For More Weather Information:

Grand Rapids, MI Local Forecast Office

Pentwater MI

Marine Point Forecast

[NOTICE]

Today
High: 70 °F
NE 6kt
< 1ft
Tonight
Low: 50 °F
ESE 8kt
< 1ft
Saturday
High: 66 °F
E 10kt
< 1ft
Saturday Night
Low: 50 °F
ENE 7kt
< 1ft
Sunday
High: 69 °F
NE 9kt
< 1ft
Sunday Night
Low: 49 °F
ENE 8kt
< 1ft
Monday
High: 65 °F
ENE 10kt
< 1ft
Monday Night
Low: 47 °F
ENE 9kt
< 1ft
Tuesday
High: 64 °F
NE 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: 7:03 am CDT Sep 18, 2026
Forecast Valid: 8am CDT Sep 18, 2026-6pm CDT Sep 24, 2026

View Nearby Observations

Detailed Forecast

Today

NE wind around 6 kt. Partly sunny. Waves 1 ft or less.

Tonight

NE wind 6 to 8 kt becoming ESE after midnight. Showers likely, mainly between 1am and 5am. Waves 1 ft or less.

Saturday

E wind around 10 kt, with gusts as high as 20 kt. Showers before noon, then a chance of showers after 1pm. The rain could be heavy at times. Waves 1 ft or less.

Saturday Night

ENE wind 5 to 7 kt. A chance of showers. Waves 1 ft or less.

Sunday

NE wind 7 to 9 kt, with gusts as high as 18 kt. A chance of showers, mainly before 1pm. Waves 1 ft or less.

Sunday Night

ENE wind around 8 kt, with gusts as high as 18 kt. Mostly cloudy. Waves 1 ft or less.

Monday

ENE wind around 10 kt, with gusts as high as 19 kt. Mostly cloudy. Waves 1 ft or less.

Monday Night

ENE wind around 9 kt, with gusts as high as 18 kt. Mostly cloudy. Waves 1 ft or less.

Tuesday

NE wind 9 to 11 kt, with gusts as high as 19 kt. 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.