National Weather Service Forecast for: Portola CA
Issued by: National Weather Service Reno, NV
Updated: 4:30 pm PDT Jun 29, 2026
 
Tonight

Tonight: Mostly clear, with a low around 42. West wind around 5 mph becoming calm in the evening.
Mostly Clear
 Tuesday

Tuesday: Sunny, with a high near 77. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Sunny
 Tuesday
Night
Tuesday Night: Clear, with a low around 42. West wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 20 mph.
Clear
 Wednesday

Wednesday: Sunny, with a high near 78. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Sunny
 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 43. West wind 5 to 10 mph becoming light southwest in the evening. Winds could gust as high as 20 mph.
Mostly Clear
 Thursday

Thursday: Mostly sunny, with a high near 78. Light southwest wind becoming west 5 to 10 mph in the afternoon.
Mostly Sunny
 Thursday
Night
Thursday Night: Mostly clear, with a low around 43.
Mostly Clear
 Friday

Friday: Sunny, with a high near 82.
Sunny
 Friday
Night
Friday Night: Clear, with a low around 46.
Clear
Lo 42 °F Hi 77 °F Lo 42 °F Hi 78 °F Lo 43 °F Hi 78 °F Lo 43 °F Hi 82 °F Lo 46 °F

 

Tonight
 
 Mostly clear, with a low around 42. West wind around 5 mph becoming calm in the evening.
Tuesday
 
 Sunny, with a high near 77. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
 
 Clear, with a low around 42. West wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 20 mph.
Wednesday
 
 Sunny, with a high near 78. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Wednesday Night
 
 Mostly clear, with a low around 43. West wind 5 to 10 mph becoming light southwest in the evening. Winds could gust as high as 20 mph.
Thursday
 
 Mostly sunny, with a high near 78. Light southwest wind becoming west 5 to 10 mph in the afternoon.
Thursday Night
 
 Mostly clear, with a low around 43.
Friday
 
 Sunny, with a high near 82.
Friday Night
 
 Clear, with a low around 46.
Independence Day
 
 Sunny, with a high near 89.
Saturday Night
 
 Mostly clear, with a low around 49.
Sunday
 
 Sunny, with a high near 88.
Sunday Night
 
 Mostly clear, with a low around 49.
Monday
 
 Sunny, with a high near 86.

 

Forecast from NOAA-NWS for Portola CA.