National Weather Service Forecast for: 3 Miles WNW Portola Valley CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 5:12 am PDT Mar 19, 2026
 
Today

Today: Sunny, with a high near 88. Calm wind becoming north around 5 mph in the afternoon.
Sunny
 Tonight

Tonight: Clear, with a low around 60. Calm wind.
Clear
 Friday

Friday: Sunny, with a high near 87. Calm wind becoming north northwest around 5 mph in the afternoon.
Sunny
 Friday
Night
Friday Night: Increasing clouds, with a low around 57. Light west wind.
Increasing
Clouds
 Saturday

Saturday: Partly sunny, with a high near 76. Calm wind becoming west northwest 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph.
Partly Sunny
 Saturday
Night
Saturday Night: Mostly clear, with a low around 50.
Mostly Clear
 Sunday

Sunday: Sunny, with a high near 74.
Sunny
 Sunday
Night
Sunday Night: Mostly clear, with a low around 49.
Mostly Clear
 Monday

Monday: Sunny, with a high near 76.
Sunny
Hi 88 °F Lo 60 °F Hi 87 °F Lo 57 °F Hi 76 °F Lo 50 °F Hi 74 °F Lo 49 °F Hi 76 °F

Heat Advisory
 

Today
 
 Sunny, with a high near 88. Calm wind becoming north around 5 mph in the afternoon.
Tonight
 
 Clear, with a low around 60. Calm wind.
Friday
 
 Sunny, with a high near 87. Calm wind becoming north northwest around 5 mph in the afternoon.
Friday Night
 
 Increasing clouds, with a low around 57. Light west wind.
Saturday
 
 Partly sunny, with a high near 76. Calm wind becoming west northwest 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph.
Saturday Night
 
 Mostly clear, with a low around 50.
Sunday
 
 Sunny, with a high near 74.
Sunday Night
 
 Mostly clear, with a low around 49.
Monday
 
 Sunny, with a high near 76.
Monday Night
 
 Mostly clear, with a low around 52.
Tuesday
 
 Sunny, with a high near 75.
Tuesday Night
 
 Mostly clear, with a low around 50.
Wednesday
 
 Sunny, with a high near 67.

 

Forecast from NOAA-NWS for 3 Miles WNW Portola Valley CA.