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

Heavy Rainfall and Flooding Threats in the Midwest and Ohio Valley; Heat Continues in the Plains and Southeast

An active pattern will continue to bring heavy to excessive rainfall and flash flooding threats to the Midwest and Ohio Valley over the next couple of days. Dangerous heat continues across the central/southern Plains and Southeast U.S. into next week. There is potential for record-tying/breaking temperatures with many areas forecast to see their hottest temperatures so far this year. Read More >

Hazardous Weather Conditions

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

Lat: 37.61961°NLon: 122.36558°WElev: 10.0ft.

Clear

72°F

22°C

Humidity 53%
Wind Speed W 4 MPH
Barometer 29.8 in (1009.14 mb)
Dewpoint 54°F (12°C)
Visibility 7.00 mi
Last update 12 Aug 05:20 PM PDT
Extended Forecast for

San Mateo CA

Coastal Flood Advisory August 12, 05:41pm until August 13, 02:00am
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory August 12, 05:41pm until August 13, 02:00am

    NOW until 2:00am Thu

    Coastal Flood Advisory

  • Tonight

    Low: 59 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 72. Southwest wind 7 to 15 mph, with gusts as high as 23 mph.

    High: 72 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 59. Southwest wind 6 to 15 mph, with gusts as high as 22 mph.

    Low: 59 °F

    Increasing
    Clouds

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 72. South southwest wind 5 to 11 mph.

    High: 72 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Partly cloudy, with a low around 58. West southwest wind 5 to 14 mph, with gusts as high as 21 mph.

    Low: 58 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 73.

    High: 73 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 73.

    High: 73 °F

    Partly Sunny

Detailed Forecast

Tonight
Partly cloudy, with a low around 59. West southwest wind 7 to 13 mph, with gusts as high as 18 mph.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 72. Southwest wind 7 to 15 mph, with gusts as high as 23 mph.
Thursday Night
Increasing clouds, with a low around 59. Southwest wind 6 to 15 mph, with gusts as high as 22 mph.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 72. South southwest wind 5 to 11 mph.
Friday Night
Partly cloudy, with a low around 58. West southwest wind 5 to 14 mph, with gusts as high as 21 mph.
Saturday
Partly sunny, with a high near 73.
Saturday Night
Partly cloudy, with a low around 58.
Sunday
Partly sunny, with a high near 73.
Sunday Night
Partly cloudy, with a low around 58.
Monday
Mostly cloudy, with a high near 73.
Monday Night
Mostly cloudy, with a low around 59.
Tuesday
Partly sunny, with a high near 75.
Tuesday Night
Partly cloudy, with a low around 60.
Wednesday
Partly sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Mateo CA
 37.54°N 122.29°W (Elev. 151 ft)
Last Update:
1:27 pm PDT Aug 12, 2026
Forecast Valid:
5pm PDT Aug 12, 2026-6pm PDT Aug 19, 2026
 
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Additional Resources

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Chance of Precipitation