National Weather Service Forecast for: Guerneville CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 8:57 am PDT Oct 6, 2026
 
Today

Today: Sunny and hot, with a high near 96. Calm wind becoming southwest around 6 mph in the afternoon.
Hot
 Tonight

Tonight: Mostly clear, with a low around 60. Calm wind.
Mostly Clear
 Wednesday

Wednesday: Sunny, with a high near 93. Calm wind becoming southwest around 6 mph in the afternoon.
Sunny
 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 57. Light and variable wind.
Mostly Clear
 Thursday

Thursday: Sunny, with a high near 93. Calm wind becoming southwest around 5 mph in the afternoon.
Sunny
 Thursday
Night
Thursday Night: Mostly clear, with a low around 59.
Mostly Clear
 Friday

Friday: Sunny, with a high near 87.
Sunny
 Friday
Night
Friday Night: Mostly clear, with a low around 55.
Mostly Clear
 Saturday

Saturday: Sunny, with a high near 78.
Sunny
Hi 96 °F Lo 60 °F Hi 93 °F Lo 57 °F Hi 93 °F Lo 59 °F Hi 87 °F Lo 55 °F Hi 78 °F

Heat Advisory
Coastal Flood Advisory
 

Today
 
 Sunny and hot, with a high near 96. Calm wind becoming southwest around 6 mph in the afternoon.
Tonight
 
 Mostly clear, with a low around 60. Calm wind.
Wednesday
 
 Sunny, with a high near 93. Calm wind becoming southwest around 6 mph in the afternoon.
Wednesday Night
 
 Mostly clear, with a low around 57. Light and variable wind.
Thursday
 
 Sunny, with a high near 93. Calm wind becoming southwest around 5 mph in the afternoon.
Thursday Night
 
 Mostly clear, with a low around 59.
Friday
 
 Sunny, with a high near 87.
Friday Night
 
 Mostly clear, with a low around 55.
Saturday
 
 Sunny, with a high near 78.
Saturday Night
 
 Mostly clear, with a low around 50.
Sunday
 
 Sunny, with a high near 75.
Sunday Night
 
 Mostly clear, with a low around 50.
Columbus Day
 
 Sunny, with a high near 77.

 

Forecast from NOAA-NWS for Guerneville CA.