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

5NM NNW Saint Joseph MI

Marine Point Forecast

[NOTICE]

Today
High: 73 °F
ENE 8kt
< 1ft
Tonight
Low: 55 °F
E 10kt
< 1ft
Saturday
High: 70 °F
SE 11kt
< 1ft
Saturday Night
Low: 57 °F
E 6kt
< 1ft
Sunday
High: 68 °F
ENE 11kt
< 1ft
Sunday Night
Low: 52 °F
ENE 12kt
< 1ft
Monday
High: 64 °F
ENE 13kt
< 1ft
Monday Night
Low: 50 °F
ENE 15kt
< 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: 6:03 am CDT Sep 18, 2026
Forecast Valid: 6am CDT Sep 18, 2026-6pm CDT Sep 24, 2026

View Nearby Observations

Detailed Forecast

Today

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

Tonight

E wind 6 to 10 kt. A chance of showers, with thunderstorms also possible after 4am. Waves 1 ft or less.

Saturday

SE wind 7 to 11 kt, with gusts as high as 18 kt. Showers and thunderstorms before 1pm, then showers between 1pm and 4pm, then showers and possibly a thunderstorm after 4pm. Waves 1 ft or less.

Saturday Night

E wind around 6 kt. Showers and possibly a thunderstorm. Waves 1 ft or less.

Sunday

ENE wind 8 to 11 kt, with gusts as high as 19 kt. Showers likely, mainly before 1pm. Waves 1 ft or less.

Sunday Night

ENE wind around 12 kt, with gusts as high as 20 kt. A chance of showers after 1am. Waves 1 ft or less.

Monday

ENE wind 11 to 13 kt, with gusts as high as 22 kt. A chance of showers. Waves 1 ft or less.

Monday Night

ENE wind 10 to 15 kt, with gusts as high as 24 kt. A chance of showers. Waves 1 ft or less.

Tuesday

NE wind around 11 kt, with gusts as high as 20 kt. A chance of showers. 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.