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]

Tonight
Low: 56 °F
E 9kt
< 1ft
Saturday
High: 73 °F
SE 11kt
< 1ft
Saturday Night
Low: 59 °F
⇑N 6kt
< 1ft
Sunday
High: 69 °F
NE 12kt
< 1ft
Sunday Night
Low: 53 °F
ENE 12kt
< 1ft
Monday
High: 66 °F
ENE 12kt
< 1ft
Monday Night
Low: 51 °F
ENE 13kt
< 1ft
Tuesday
High: 65 °F
ENE 12kt
< 1ft
Tuesday Night
Low: 52 °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 pm CDT Sep 18, 2026
Forecast Valid: 6pm CDT Sep 18, 2026-6pm CDT Sep 25, 2026

View Nearby Observations

Detailed Forecast

Tonight

E wind 5 to 9 kt, with gusts as high as 18 kt. A slight chance of showers before 1am, then a chance of showers and thunderstorms between 1am and 4am, then showers likely and possibly a thunderstorm after 4am. Waves 1 ft or less.

Saturday

SE wind 5 to 11 kt, with gusts as high as 22 kt. Showers and possibly a thunderstorm. Waves 1 ft or less.

Saturday Night

Variable winds less than 5 kt becoming N around 6 kt after midnight. Showers and possibly a thunderstorm before 4am, then showers likely. Some of the storms could produce heavy rainfall. Waves 1 ft or less.

Sunday

NE wind 8 to 12 kt, with gusts as high as 20 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, mainly after 1am. Waves 1 ft or less.

Monday

ENE wind around 12 kt, with gusts as high as 21 kt. A chance of showers. Waves 1 ft or less.

Monday Night

ENE wind 11 to 13 kt, with gusts as high as 22 kt. Mostly cloudy. Waves 1 ft or less.

Tuesday

ENE wind around 12 kt, with gusts as high as 20 kt. Partly sunny. Waves 1 ft or less.

Tuesday Night

NE wind 8 to 11 kt, with gusts as high as 19 kt. Mostly cloudy. 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.