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

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 >

Hazardous Weather Conditions

Current conditions at

South Haven, South Haven Area Regional Airport (KLWA)

Lat: 42.35°NLon: 86.26°WElev: 666ft.

Overcast

61°F

16°C

Humidity 83%
Wind Speed E 16 G 24 mph
Barometer 30.04 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 19 Sep 5:35 am EDT
Extended Forecast for

South Haven MI

Flood Watch September 19, 05:51am until September 20, 08:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch September 19, 05:51am until September 20, 08:00am

    NOW until 8:00am Sun

    Flood Watch

  • Overnight

    Low: 57 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm before 3pm, then showers likely. Patchy fog before 2pm, then patchy fog after 5pm. High near 71. East southeast wind 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    High: 71 °F

    Showers and
    Patchy Fog
    then Showers
    Likely and
    Patchy Fog

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Patchy fog before 8pm. Low around 58. Southeast wind 3 to 6 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    Low: 58 °F

    Showers and
    Patchy Fog

  • Sunday

    Sunday: A 40 percent chance of showers before 11am. Mostly cloudy, with a high near 70. Northeast wind 10 to 13 mph, with gusts as high as 22 mph.

    High: 70 °F

    Chance
    Showers then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 51. East northeast wind around 11 mph, with gusts as high as 21 mph.

    Low: 51 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 65.

    High: 65 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 48.

    Low: 48 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny

Detailed Forecast

Overnight
Showers likely and possibly a thunderstorm. Cloudy, with a steady temperature around 57. East wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers and possibly a thunderstorm before 3pm, then showers likely. Patchy fog before 2pm, then patchy fog after 5pm. High near 71. East southeast wind 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Saturday Night
Showers and possibly a thunderstorm. Patchy fog before 8pm. Low around 58. Southeast wind 3 to 6 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Sunday
A 40 percent chance of showers before 11am. Mostly cloudy, with a high near 70. Northeast wind 10 to 13 mph, with gusts as high as 22 mph.
Sunday Night
Mostly cloudy, with a low around 51. East northeast wind around 11 mph, with gusts as high as 21 mph.
Monday
Mostly cloudy, with a high near 65.
Monday Night
Mostly cloudy, with a low around 48.
Tuesday
Partly sunny, with a high near 65.
Tuesday Night
Mostly cloudy, with a low around 50.
Wednesday
A chance of showers between 8am and 2pm. Partly sunny, with a high near 65.
Wednesday Night
Mostly cloudy, with a low around 51.
Thursday
Partly sunny, with a high near 67.
Thursday Night
Mostly cloudy, with a low around 51.
Friday
Mostly sunny, with a high near 69.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Haven MI
 42.41°N 86.28°W (Elev. 597 ft)
Last Update:
5:03 am EDT Sep 19, 2026
Forecast Valid:
5am EDT Sep 19, 2026-6pm EDT Sep 25, 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