Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

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

Clear

70°F

21°C

Humidity 60%
Wind Speed NW 17 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 27 Aug 03:35 PM PDT
Extended Forecast for

Foster City CA

  • Tonight

    Tonight: Mostly cloudy, with a low around 60. West wind 5 to 9 mph becoming calm  after midnight.

    Low: 60 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of showers.  Cloudy, then gradually becoming mostly sunny, with a high near 74. Light south southwest wind becoming west northwest 10 to 15 mph in the morning. Winds could gust as high as 18 mph.

    High: 74 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 57. Southwest wind 6 to 10 mph.

    Low: 57 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 73. West wind 6 to 14 mph, with gusts as high as 22 mph.

    High: 73 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 57. West southwest wind 10 to 15 mph, with gusts as high as 23 mph.

    Low: 57 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 73.

    High: 73 °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 71.

    High: 71 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 60. West wind 5 to 9 mph becoming calm after midnight.
Friday
A 20 percent chance of showers. Cloudy, then gradually becoming mostly sunny, with a high near 74. Light south southwest wind becoming west northwest 10 to 15 mph in the morning. Winds could gust as high as 18 mph.
Friday Night
Partly cloudy, with a low around 57. Southwest wind 6 to 10 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 73. West wind 6 to 14 mph, with gusts as high as 22 mph.
Saturday Night
Mostly clear, with a low around 57. West southwest wind 10 to 15 mph, with gusts as high as 23 mph.
Sunday
Mostly sunny, with a high near 73.
Sunday Night
Mostly clear, with a low around 56.
Monday
Mostly sunny, with a high near 71.
Monday Night
Partly cloudy, with a low around 56.
Tuesday
Partly sunny, with a high near 73.
Tuesday Night
Mostly clear, with a low around 56.
Wednesday
Mostly sunny, with a high near 74.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
A slight chance of showers. Mostly sunny, with a high near 76.
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ABOUT THIS FORECAST

 
Point Forecast:
Foster City CA
 37.57°N 122.27°W (Elev. 3 ft)
1:42 pm PDT Aug 27, 2026
3pm 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