National Weather Service Forecast for: 5 Miles SW Portola Valley CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:26 pm PDT Jun 19, 2026
 
Tonight

Tonight: Mostly cloudy, with a low around 54. South southwest wind around 5 mph becoming calm in the evening.
Mostly Cloudy
 Saturday

Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 66. Calm wind becoming west southwest around 6 mph in the afternoon.
Decreasing
Clouds
 Saturday
Night
Saturday Night: Patchy fog between 9pm and 1am. Otherwise, mostly cloudy, with a low around 50. Calm wind.
Patchy Fog
 Sunday

Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 68. Calm wind becoming west around 5 mph in the afternoon.
Decreasing
Clouds
 Sunday
Night
Sunday Night: Mostly cloudy, with a low around 51. Light and variable wind.
Mostly Cloudy
 Monday

Monday: Mostly sunny, with a high near 70.
Mostly Sunny
 Monday
Night
Monday Night: Patchy fog between 11pm and 2am. Otherwise, partly cloudy, with a low around 52.
Patchy Fog
 Tuesday

Tuesday: Mostly sunny, with a high near 72.
Mostly Sunny
 Tuesday
Night
Tuesday Night: Patchy fog between 11pm and 3am. Otherwise, partly cloudy, with a low around 53.
Patchy Fog
Lo 54 °F Hi 66 °F Lo 50 °F Hi 68 °F Lo 51 °F Hi 70 °F Lo 52 °F Hi 72 °F Lo 53 °F

 

Tonight
 
 Mostly cloudy, with a low around 54. South southwest wind around 5 mph becoming calm in the evening.
Saturday
 
 Mostly cloudy, then gradually becoming sunny, with a high near 66. Calm wind becoming west southwest around 6 mph in the afternoon.
Saturday Night
 
 Patchy fog between 9pm and 1am. Otherwise, mostly cloudy, with a low around 50. Calm wind.
Sunday
 
 Mostly cloudy, then gradually becoming sunny, with a high near 68. Calm wind becoming west around 5 mph in the afternoon.
Sunday Night
 
 Mostly cloudy, with a low around 51. Light and variable wind.
Monday
 
 Mostly sunny, with a high near 70.
Monday Night
 
 Patchy fog between 11pm and 2am. Otherwise, partly cloudy, with a low around 52.
Tuesday
 
 Mostly sunny, with a high near 72.
Tuesday Night
 
 Patchy fog between 11pm and 3am. Otherwise, partly cloudy, with a low around 53.
Wednesday
 
 Mostly sunny, with a high near 73.
Wednesday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 54.
Thursday
 
 Mostly sunny, with a high near 72.
Thursday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 53.
Friday
 
 Mostly sunny, with a high near 71.

 

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