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

Fire Weather Concerns and Severe Thunderstorms through the Weekend

Dry and windy conditions, and some dry thunderstorms and lightning, may support hazardous fire activity in the northern Plains, high southern Plains and the Southwest this weekend. An active severe weather pattern is forecast for portions of the central and southern High Plains into the Upper Midwest through early the part of next week. Damaging winds, large hail, and tornadoes are possible. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

NA

77°F

25°C

Humidity 32%
Wind Speed WSW 2 MPH
Barometer NA
Dewpoint 45°F (7°C)
Visibility NA
Heat Index78°F (26°C)
Last update 15 May 12:10 PM PDT
Extended Forecast for

2 Miles SE Portola Valley CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 72. West wind around 9 mph, with gusts as high as 22 mph.

    High: 72 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 49. West northwest wind 10 to 14 mph, with gusts as high as 31 mph.

    Low: 49 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 65. West northwest wind 11 to 13 mph, with gusts as high as 30 mph.

    High: 65 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 45. West northwest wind 7 to 16 mph, with gusts as high as 34 mph.

    Low: 45 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 70. Northwest wind 6 to 10 mph, with gusts as high as 25 mph.

    High: 70 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 54.

    Low: 54 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 50.

    Low: 50 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 72. West wind around 9 mph, with gusts as high as 22 mph.
Tonight
Mostly clear, with a low around 49. West northwest wind 10 to 14 mph, with gusts as high as 31 mph.
Saturday
Sunny, with a high near 65. West northwest wind 11 to 13 mph, with gusts as high as 30 mph.
Saturday Night
Partly cloudy, with a low around 45. West northwest wind 7 to 16 mph, with gusts as high as 34 mph.
Sunday
Sunny, with a high near 70. Northwest wind 6 to 10 mph, with gusts as high as 25 mph.
Sunday Night
Clear, with a low around 54.
Monday
Sunny, with a high near 78.
Monday Night
Clear, with a low around 50.
Tuesday
Sunny, with a high near 81.
Tuesday Night
Clear, with a low around 54.
Wednesday
Sunny, with a high near 82.
Wednesday Night
Clear, with a low around 54.
Thursday
Sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SE Portola Valley CA
 37.35°N 122.19°W (Elev. 1220 ft)
Last Update:
11:27 am PDT May 15, 2026
Forecast Valid:
1pm PDT May 15, 2026-6pm PDT May 21, 2026
 
Forecast Discussion
 
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Additional Resources

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