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

Severe Thunderstorms and Critical Fire Weather Wednesday

Scattered severe thunderstorms are possible across portions of the northern High Plains Wednesday afternoon and evening. Severe wind gusts are the primary hazard. Gusty winds and low relative humidity will contribute to critical fire weather conditions across parts of the northern Great Plains and Great Basin Wednesday. Read More >

Current conditions at

LOS ALTOS (LOAC1)

Lat: 37.35472°NLon: 122.14167°WElev: 539.0ft.

NA

61°F

16°C

Humidity 69%
Wind Speed WSW 2 MPH
Barometer NA
Dewpoint 51°F (11°C)
Visibility NA
Last update 13 May 08:10 AM PDT
Extended Forecast for

Portola Valley CA

  • Today

    Today: Sunny, with a high near 69. West wind 6 to 11 mph, with gusts as high as 23 mph.

    High: 69 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 46. West wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 20 mph.

    Low: 46 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 75. Calm wind becoming west southwest 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 75 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 48. West wind 5 to 8 mph becoming calm after midnight.

    Low: 48 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 75. Light west wind becoming west northwest 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph.

    High: 75 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 48.

    Low: 48 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 70.

    High: 70 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 69. West wind 6 to 11 mph, with gusts as high as 23 mph.
Tonight
Mostly clear, with a low around 46. West wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 20 mph.
Thursday
Sunny, with a high near 75. Calm wind becoming west southwest 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.
Thursday Night
Mostly clear, with a low around 48. West wind 5 to 8 mph becoming calm after midnight.
Friday
Sunny, with a high near 75. Light west wind becoming west northwest 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph.
Friday Night
Clear, with a low around 48.
Saturday
Sunny, with a high near 70.
Saturday Night
Mostly clear, with a low around 47.
Sunday
Sunny, with a high near 74.
Sunday Night
Mostly clear, with a low around 50.
Monday
Sunny, with a high near 84.
Monday Night
Clear, with a low around 52.
Tuesday
Sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portola Valley CA
 37.39°N 122.23°W (Elev. 397 ft)
Last Update:
8:36 am PDT May 13, 2026
Forecast Valid:
8am PDT May 13, 2026-6pm PDT May 19, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation