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

San Francisco, San Francisco International Airport (KSFO)

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

Mist

57°F

14°C

Humidity 93%
Wind Speed WNW 11 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 55°F (13°C)
Visibility 6.00 mi
Last update 29 Aug 01:20 AM PDT
Extended Forecast for

San Mateo CA

  • Overnight

    Overnight: Partly cloudy, with a low around 57. West southwest wind around 6 mph.

    Low: 57 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 71. West wind 6 to 14 mph, with gusts as high as 22 mph.

    High: 71 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 56. West southwest wind 8 to 14 mph, with gusts as high as 23 mph.

    Low: 56 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 72. West southwest wind 7 to 10 mph.

    High: 72 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 56. West wind 6 to 11 mph.

    Low: 56 °F

    Mostly Clear

  • Monday

    Monday: Partly sunny, with a high near 69.

    High: 69 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 57. West southwest wind around 6 mph.
Saturday
Mostly sunny, with a high near 71. West wind 6 to 14 mph, with gusts as high as 22 mph.
Saturday Night
Mostly clear, with a low around 56. West southwest wind 8 to 14 mph, with gusts as high as 23 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 72. West southwest wind 7 to 10 mph.
Sunday Night
Mostly clear, with a low around 56. West wind 6 to 11 mph.
Monday
Partly sunny, with a high near 69.
Monday Night
Partly cloudy, with a low around 57.
Tuesday
Mostly sunny, with a high near 71.
Tuesday Night
Mostly clear, with a low around 56.
Wednesday
Mostly sunny, with a high near 74.
Wednesday Night
Partly cloudy, with a low around 57.
Thursday
Mostly sunny, with a high near 76.
Thursday Night
Partly cloudy, with a low around 58.
Friday
Mostly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Mateo CA
 37.56°N 122.3°W (Elev. 36 ft)
Last Update:
1:26 am PDT Aug 29, 2026
Forecast Valid:
1am PDT Aug 29, 2026-6pm PDT Sep 4, 2026
 
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Additional Resources

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