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

Areas of Hazardous Weather This Weekend

A series of cold fronts from North Pacific storms will bring periods of gusty winds, low elevation rainfall, and high elevation snow to the Pacific Northwest this weekend into next week. Heavy to excessive rainfall may produce areas of flooding over southern Texas this weekend. Read More >

Hazardous Weather Conditions

Current conditions at

LOS ALTOS (LOAC1)

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

NA

53°F

12°C

Humidity 61%
Wind Speed WSW 4 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Last update 07 Nov 12:10 AM PST
Extended Forecast for

Portola Valley CA

Coastal Flood Advisory November 7, 12:50am until November 13, 04:00pm
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory November 7, 12:50am until November 13, 04:00pm

    NOW until 4:00pm Fri

    Coastal Flood Advisory

  • Overnight

    Low: 50 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 77. Light and variable wind.

    High: 77 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 2am. Otherwise, partly cloudy, with a low around 51. West northwest wind around 5 mph becoming calm in the evening.

    Low: 51 °F

    Partly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 74. Light north northwest wind.

    High: 74 °F

    Patchy Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 52. Calm wind.

    Low: 52 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

Detailed Forecast

Overnight
Mostly clear, with a low around 50. Calm wind.
Saturday
Mostly sunny, with a high near 77. Light and variable wind.
Saturday Night
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 51. West northwest wind around 5 mph becoming calm in the evening.
Sunday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 74. Light north northwest wind.
Sunday Night
Partly cloudy, with a low around 52. Calm wind.
Monday
Mostly sunny, with a high near 74.
Monday Night
Mostly clear, with a low around 52.
Tuesday
Sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 51.
Veterans Day
Sunny, with a high near 77.
Wednesday Night
Mostly clear, with a low around 52.
Thursday
A slight chance of rain. Mostly sunny, with a high near 71.
Thursday Night
A slight chance of rain. Partly cloudy, with a low around 52.
Friday
A chance of rain. Partly sunny, with a high near 69.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portola Valley CA
 37.39°N 122.23°W (Elev. 397 ft)
Last Update:
12:26 am PST Nov 7, 2026
Forecast Valid:
12am PST Nov 7, 2026-6pm PST Nov 13, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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