National Weather Service Forecast for: Portola CA
Issued by: National Weather Service Reno, NV
Updated: 4:30 pm PDT Sep 12, 2026
 
Tonight

Tonight: Clear, with a low around 40. Breezy, with a southwest wind 15 to 20 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 35 mph.
Clear and
Breezy
Sunday

Sunday: Sunny, with a high near 70. Northwest wind 5 to 10 mph becoming southwest in the morning. Winds could gust as high as 20 mph.
Sunny
Sunday
Night
Sunday Night: Clear, with a low around 38. West wind 5 to 10 mph becoming light and variable  in the evening.
Clear
Monday

Monday: Sunny, with a high near 76. East wind 5 to 10 mph.
Sunny
Monday
Night
Monday Night: Clear, with a low around 42. Northeast wind around 5 mph becoming calm  in the evening.
Clear
Tuesday

Tuesday: Sunny, with a high near 79. Calm wind becoming west around 5 mph in the afternoon.
Sunny
Tuesday
Night
Tuesday Night: Clear, with a low around 43.
Clear
Wednesday

Wednesday: Sunny, with a high near 79.
Sunny
Wednesday
Night
Wednesday Night: Clear, with a low around 44.
Clear
Lo 40 °F Hi 70 °F Lo 38 °F Hi 76 °F Lo 42 °F Hi 79 °F Lo 43 °F Hi 79 °F Lo 44 °F

Wind Advisory
 

Tonight
 
Clear, with a low around 40. Breezy, with a southwest wind 15 to 20 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 35 mph.
Sunday
 
Sunny, with a high near 70. Northwest wind 5 to 10 mph becoming southwest in the morning. Winds could gust as high as 20 mph.
Sunday Night
 
Clear, with a low around 38. West wind 5 to 10 mph becoming light and variable in the evening.
Monday
 
Sunny, with a high near 76. East wind 5 to 10 mph.
Monday Night
 
Clear, with a low around 42. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
 
Sunny, with a high near 79. Calm wind becoming west around 5 mph in the afternoon.
Tuesday Night
 
Clear, with a low around 43.
Wednesday
 
Sunny, with a high near 79.
Wednesday Night
 
Clear, with a low around 44.
Thursday
 
Sunny, with a high near 82.
Thursday Night
 
Mostly clear, with a low around 46.
Friday
 
Sunny, with a high near 83.
Friday Night
 
Mostly clear, with a low around 47.
Saturday
 
Sunny, with a high near 81.

 

Forecast from NOAA-NWS for Portola CA.