National Weather Service Forecast for: 6 Miles SW Portola Valley CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:26 am PDT Jun 22, 2026
 
Overnight

Overnight: Patchy fog. Otherwise, cloudy, with a steady temperature around 53. Calm wind.
Patchy Fog
 Monday

Monday: Patchy fog before 8am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 68. Calm wind becoming west southwest around 5 mph in the afternoon.
Patchy Fog
then Sunny
 Monday
Night
Monday Night: Patchy fog after 10pm. Otherwise, increasing clouds, with a low around 51. Calm wind.
Patchy Fog
 Tuesday

Tuesday: Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 71. Calm wind becoming west southwest around 5 mph in the afternoon.
Patchy Fog
then Sunny
 Tuesday
Night
Tuesday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 52. Calm wind.
Patchy Fog
 Wednesday

Wednesday: Mostly sunny, with a high near 72.
Mostly Sunny
 Wednesday
Night
Wednesday Night: Patchy fog between 11pm and 4am. Otherwise, partly cloudy, with a low around 52.
Patchy Fog
 Thursday

Thursday: Mostly sunny, with a high near 69.
Mostly Sunny
 Thursday
Night
Thursday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 51.
Patchy Fog
Lo 53 °F Hi 68 °F Lo 51 °F Hi 71 °F Lo 52 °F Hi 72 °F Lo 52 °F Hi 69 °F Lo 51 °F

 

Overnight
 
 Patchy fog. Otherwise, cloudy, with a steady temperature around 53. Calm wind.
Monday
 
 Patchy fog before 8am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 68. Calm wind becoming west southwest around 5 mph in the afternoon.
Monday Night
 
 Patchy fog after 10pm. Otherwise, increasing clouds, with a low around 51. Calm wind.
Tuesday
 
 Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 71. Calm wind becoming west southwest around 5 mph in the afternoon.
Tuesday Night
 
 Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 52. Calm wind.
Wednesday
 
 Mostly sunny, with a high near 72.
Wednesday Night
 
 Patchy fog between 11pm and 4am. Otherwise, partly cloudy, with a low around 52.
Thursday
 
 Mostly sunny, with a high near 69.
Thursday Night
 
 Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 51.
Friday
 
 Mostly sunny, with a high near 66.
Friday Night
 
 Patchy fog. Otherwise, mostly cloudy, with a low around 53.
Saturday
 
 Patchy fog. Otherwise, partly sunny, with a high near 64.
Saturday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 50.
Sunday
 
 Sunny, with a high near 70.

 

Forecast from NOAA-NWS for 6 Miles SW Portola Valley CA.