National Weather Service Forecast for: 5 Miles SW Portola Valley CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 11:27 am PDT Oct 6, 2026
 
This
Afternoon
This Afternoon: Sunny, with a temperature falling to around 87 by 5pm. West northwest wind 3 to 6 mph.
Sunny
 Tonight

Tonight: Mostly clear, with a low around 62. Calm wind.
Mostly Clear
 Wednesday

Wednesday: Sunny, with a high near 90. Calm wind becoming west northwest around 6 mph in the afternoon.
Sunny
 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 58. Calm wind.
Mostly Clear
 Thursday

Thursday: Sunny, with a high near 85. Calm wind becoming northwest around 5 mph in the afternoon.
Sunny
 Thursday
Night
Thursday Night: Partly cloudy, with a low around 57.
Partly Cloudy
 Friday

Friday: Sunny, with a high near 76.
Sunny
 Friday
Night
Friday Night: Partly cloudy, with a low around 54.
Partly Cloudy
 Saturday

Saturday: Mostly sunny, with a high near 63.
Mostly Sunny
Hi 90 °F⇓ Lo 62 °F Hi 90 °F Lo 58 °F Hi 85 °F Lo 57 °F Hi 76 °F Lo 54 °F Hi 63 °F

Heat Advisory
 

This Afternoon
 
 Sunny, with a temperature falling to around 87 by 5pm. West northwest wind 3 to 6 mph.
Tonight
 
 Mostly clear, with a low around 62. Calm wind.
Wednesday
 
 Sunny, with a high near 90. Calm wind becoming west northwest around 6 mph in the afternoon.
Wednesday Night
 
 Mostly clear, with a low around 58. Calm wind.
Thursday
 
 Sunny, with a high near 85. Calm wind becoming northwest around 5 mph in the afternoon.
Thursday Night
 
 Partly cloudy, with a low around 57.
Friday
 
 Sunny, with a high near 76.
Friday Night
 
 Partly cloudy, with a low around 54.
Saturday
 
 Mostly sunny, with a high near 63.
Saturday Night
 
 Partly cloudy, with a low around 48.
Sunday
 
 Sunny, with a high near 64.
Sunday Night
 
 Mostly clear, with a low around 47.
Columbus Day
 
 Sunny, with a high near 66.

 

Forecast from NOAA-NWS for 5 Miles SW Portola Valley CA.