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.

Mostly Cloudy

60°F

16°C

Humidity 86%
Wind Speed WNW 18 MPH
Barometer 29.95 in (1014.22 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 27 Aug 10:56 PM PDT
Extended Forecast for

Foster City CA

  • Tonight

    Tonight: A 20 percent chance of rain after 4am.  Mostly cloudy, with a steady temperature around 63. West wind around 6 mph.

    Low: 63 °F

    Slight Chance
    Rain

  • Friday

    Friday: A 20 percent chance of rain.  Cloudy, then gradually becoming mostly sunny, with a high near 74. Light west wind becoming west northwest 6 to 11 mph in the morning.

    High: 74 °F

    Slight Chance
    Rain

  • Friday Night

    Friday Night: Partly cloudy, with a low around 57. West southwest wind 5 to 10 mph.

    Low: 57 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 72. West wind 6 to 15 mph, with gusts as high as 23 mph.

    High: 72 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 56. West southwest wind 10 to 15 mph, with gusts as high as 24 mph.

    Low: 56 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Sunday Night

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

    Low: 56 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

  • Monday Night

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

    Low: 57 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of rain after 4am. Mostly cloudy, with a steady temperature around 63. West wind around 6 mph.
Friday
A 20 percent chance of rain. Cloudy, then gradually becoming mostly sunny, with a high near 74. Light west wind becoming west northwest 6 to 11 mph in the morning.
Friday Night
Partly cloudy, with a low around 57. West southwest wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 72. West wind 6 to 15 mph, with gusts as high as 23 mph.
Saturday Night
Mostly clear, with a low around 56. West southwest wind 10 to 15 mph, with gusts as high as 24 mph.
Sunday
Mostly sunny, with a high near 72.
Sunday Night
Mostly clear, with a low around 56.
Monday
Mostly sunny, with a high near 70.
Monday Night
Partly cloudy, with a low around 57.
Tuesday
Partly sunny, with a high near 72.
Tuesday Night
Partly cloudy, with a low around 56.
Wednesday
Mostly sunny, with a high near 73.
Wednesday Night
Partly cloudy, with a low around 57.
Thursday
Mostly sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
Foster City CA
 37.55°N 122.27°W (Elev. 33 ft)
10:52 pm PDT Aug 27, 2026
11pm PDT Aug 27, 2026-6pm PDT Sep 3, 2026
 
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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