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

San Francisco, San Francisco International Airport (KSFO)

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

Mostly Cloudy

59°F

15°C

Humidity 82%
Wind Speed W 16 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 18 Oct 07:05 PM PDT
Extended Forecast for

Foster City CA

  • Tonight

    Tonight: Mostly cloudy, with a low around 53. West wind 9 to 15 mph, with gusts as high as 23 mph.

    Low: 53 °F

    Mostly Cloudy

  • Monday

    Monday: Increasing clouds, with a high near 66. West wind 9 to 13 mph, with gusts as high as 20 mph.

    High: 66 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 52. West wind 6 to 11 mph becoming light and variable in the evening. Winds could gust as high as 18 mph.

    Low: 52 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain before 11am. Mostly cloudy, with a high near 69. Light and variable wind.

    High: 69 °F

    Slight Chance
    Rain then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 54. West northwest wind around 6 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.

    Low: 54 °F

    Chance Rain

  • Wednesday

    Wednesday: Rain likely. Mostly cloudy, with a high near 70. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 70 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 54.

    Low: 54 °F

    Chance Rain
    and Patchy
    Fog

  • Thursday

    Thursday: A slight chance of rain before 11am. Patchy fog before 8am. Otherwise, partly sunny, with a high near 68.

    High: 68 °F

    Slight Chance
    Rain and
    Patchy Fog
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 53. West wind 9 to 15 mph, with gusts as high as 23 mph.
Monday
Increasing clouds, with a high near 66. West wind 9 to 13 mph, with gusts as high as 20 mph.
Monday Night
Mostly cloudy, with a low around 52. West wind 6 to 11 mph becoming light and variable in the evening. Winds could gust as high as 18 mph.
Tuesday
A 20 percent chance of rain before 11am. Mostly cloudy, with a high near 69. Light and variable wind.
Tuesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 54. West northwest wind around 6 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Rain likely. Mostly cloudy, with a high near 70. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A 40 percent chance of rain. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 54.
Thursday
A slight chance of rain before 11am. Patchy fog before 8am. Otherwise, partly sunny, with a high near 68.
Thursday Night
Partly cloudy, with a low around 54.
Friday
Sunny, with a high near 70.
Friday Night
Mostly clear, with a low around 52.
Saturday
Sunny, with a high near 72.
Saturday Night
Mostly clear, with a low around 53.
Sunday
A chance of rain. Mostly sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Foster City CA
 37.57°N 122.27°W (Elev. 3 ft)
Last Update:
1:47 pm PDT Oct 18, 2026
Forecast Valid:
7pm PDT Oct 18, 2026-6pm PDT Oct 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation