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

Hazardous Weather Conditions

Current conditions at

LOS ALTOS (LOAC1)

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

NA

52°F

11°C

Humidity 70%
Wind Speed W 1 MPH
Barometer NA
Dewpoint 42°F (6°C)
Visibility NA
Last update 12 Oct 12:10 AM PDT
Extended Forecast for

3 Miles NNW Portola Valley CA

Coastal Flood Advisory October 12, 12:43am until October 13, 03:00pm
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory October 12, 12:43am until October 13, 03:00pm

    NOW until 3:00pm Tue

    Coastal Flood Advisory

  • Overnight

    Low: 47 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 72. Calm wind becoming north around 6 mph in the afternoon.

    High: 72 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 47. Light and variable wind.

    Low: 47 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 76. Calm wind becoming north northwest 5 to 7 mph in the afternoon.

    High: 76 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 49. Northwest wind 5 to 9 mph becoming calm in the evening.

    Low: 49 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 53.

    Low: 53 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

Detailed Forecast

Overnight
Mostly clear, with a low around 47. South wind 3 to 8 mph.
Columbus Day
Sunny, with a high near 72. Calm wind becoming north around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 47. Light and variable wind.
Tuesday
Sunny, with a high near 76. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Tuesday Night
Clear, with a low around 49. Northwest wind 5 to 9 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 82.
Wednesday Night
Clear, with a low around 53.
Thursday
Sunny, with a high near 90.
Thursday Night
Clear, with a low around 57.
Friday
Sunny, with a high near 93.
Friday Night
Clear, with a low around 59.
Saturday
Sunny, with a high near 90.
Saturday Night
Clear, with a low around 56.
Sunday
Sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Portola Valley CA
 37.42°N 122.23°W (Elev. 397 ft)
Last Update:
11:27 pm PDT Oct 11, 2026
Forecast Valid:
12am PDT Oct 12, 2026-6pm PDT Oct 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation