National Weather Service Forecast for: 5 Miles SW Portola Valley CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 11:26 am PDT May 4, 2026
 
Today

Today: Partly sunny, with a high near 59. West wind 3 to 6 mph.
Partly Sunny

 Tonight

Tonight: A 50 percent chance of rain, mainly after 1am. Cloudy, with a low around 49. Light west wind. New precipitation amounts of less than a tenth of an inch possible.
Mostly Cloudy
then Chance
Rain
 Tuesday

Tuesday: A 10 percent chance of rain before 7am. Mostly cloudy, with a high near 58. Calm wind becoming west around 6 mph in the afternoon.
Slight Chance
Rain then
Mostly Cloudy
 Tuesday
Night
Tuesday Night: Mostly cloudy, with a low around 50. West wind around 5 mph becoming calm in the evening.
Mostly Cloudy

 Wednesday

Wednesday: Partly sunny, with a high near 65. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Partly Sunny

 Wednesday
Night
Wednesday Night: Mostly cloudy, with a low around 50.
Mostly Cloudy

 Thursday

Thursday: Mostly sunny, with a high near 66.
Mostly Sunny

 Thursday
Night
Thursday Night: Partly cloudy, with a low around 50.
Partly Cloudy

 Friday

Friday: Mostly sunny, with a high near 65.
Mostly Sunny
Hi 59 °F Lo 49 °F Hi 58 °F Lo 50 °F Hi 65 °F Lo 50 °F Hi 66 °F Lo 50 °F Hi 65 °F

 

Today
 
 Partly sunny, with a high near 59. West wind 3 to 6 mph.
Tonight
 
 A 50 percent chance of rain, mainly after 1am. Cloudy, with a low around 49. Light west wind. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
 
 A 10 percent chance of rain before 7am. Mostly cloudy, with a high near 58. Calm wind becoming west around 6 mph in the afternoon.
Tuesday Night
 
 Mostly cloudy, with a low around 50. West wind around 5 mph becoming calm in the evening.
Wednesday
 
 Partly sunny, with a high near 65. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Wednesday Night
 
 Mostly cloudy, with a low around 50.
Thursday
 
 Mostly sunny, with a high near 66.
Thursday Night
 
 Partly cloudy, with a low around 50.
Friday
 
 Mostly sunny, with a high near 65.
Friday Night
 
 Mostly clear, with a low around 50.
Saturday
 
 Sunny, with a high near 74.
Saturday Night
 
 Mostly clear, with a low around 52.
Sunday
 
 Sunny, with a high near 78.

 

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