National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

South Haven, South Haven Area Regional Airport (KLWA)

Lat: 42.35°NLon: 86.26°WElev: 666ft.

Partly Cloudy

63°F

17°C

Humidity 88%
Wind Speed S 2 mph
Barometer 30.16 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 29 Aug 6:55 am EDT
Extended Forecast for

4 Miles SSW Allegan MI

  • Today

    Today: Partly sunny, with a high near 81. West southwest wind 5 to 9 mph.

    High: 81 °F

    Partly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers after 9pm. Mostly cloudy, with a low around 67. South wind 3 to 6 mph.

    Low: 67 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms, mainly before 11am. Mostly cloudy, with a high near 84. South southwest wind 7 to 13 mph, with gusts as high as 23 mph.

    High: 84 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 70. South wind 3 to 5 mph. Chance of precipitation is 30%.

    Low: 70 °F

    Chance
    Showers

  • Monday

    Monday: Partly sunny, with a high near 87. South southwest wind 5 to 8 mph, with gusts as high as 18 mph.

    High: 87 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 73.

    Low: 73 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 87.

    High: 87 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 70.

    Low: 70 °F

    Partly Cloudy
    then Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 8am. Mostly sunny, with a high near 88.

    High: 88 °F

    Chance
    T-storms then
    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 81. West southwest wind 5 to 9 mph.
Tonight
A 20 percent chance of showers after 9pm. Mostly cloudy, with a low around 67. South wind 3 to 6 mph.
Sunday
A 40 percent chance of showers and thunderstorms, mainly before 11am. Mostly cloudy, with a high near 84. South southwest wind 7 to 13 mph, with gusts as high as 23 mph.
Sunday Night
A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 70. South wind 3 to 5 mph. Chance of precipitation is 30%.
Monday
Partly sunny, with a high near 87. South southwest wind 5 to 8 mph, with gusts as high as 18 mph.
Monday Night
Mostly cloudy, with a low around 73.
Tuesday
Partly sunny, with a high near 87.
Tuesday Night
A chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 70.
Wednesday
A chance of showers and thunderstorms before 8am. Mostly sunny, with a high near 88.
Wednesday Night
A chance of showers after 8pm. Partly cloudy, with a low around 66.
Thursday
Mostly sunny, with a high near 84.
Thursday Night
A chance of showers. Partly cloudy, with a low around 63.
Friday
A chance of showers. Mostly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Allegan MI
 42.47°N 85.86°W (Elev. 702 ft)
Last Update:
6:03 am EDT Aug 29, 2026
Forecast Valid:
7am EDT Aug 29, 2026-6pm EDT Sep 4, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation