National Weather Service Forecast for: Guerneville CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:26 am PDT Jun 30, 2026
 
Today

Today: Sunny, with a high near 82. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Sunny

Tonight

Tonight: Mostly clear, with a low around 52. Calm wind.
Mostly Clear

Wednesday

Wednesday: Sunny, with a high near 80. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Sunny

Wednesday
Night
Wednesday Night: Increasing clouds, with a low around 52. West southwest wind around 5 mph becoming calm  in the evening.
Increasing
Clouds
Thursday

Thursday: Mostly sunny, with a high near 76. Calm wind becoming southwest around 6 mph in the afternoon.
Mostly Sunny

Thursday
Night
Thursday Night: Patchy fog after 4am.  Otherwise, mostly clear, with a low around 52.
Mostly Clear
then Patchy
Fog
Friday

Friday: Sunny, with a high near 80.
Sunny

Friday
Night
Friday Night: Mostly clear, with a low around 54.
Mostly Clear

Independence
Day
Independence Day: Sunny, with a high near 81.
Sunny

Hi 82 °F Lo 52 °F Hi 80 °F Lo 52 °F Hi 76 °F Lo 52 °F Hi 80 °F Lo 54 °F Hi 81 °F

 

Today
 
Sunny, with a high near 82. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Tonight
 
Mostly clear, with a low around 52. Calm wind.
Wednesday
 
Sunny, with a high near 80. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Wednesday Night
 
Increasing clouds, with a low around 52. West southwest wind around 5 mph becoming calm in the evening.
Thursday
 
Mostly sunny, with a high near 76. Calm wind becoming southwest around 6 mph in the afternoon.
Thursday Night
 
Patchy fog after 4am. Otherwise, mostly clear, with a low around 52.
Friday
 
Sunny, with a high near 80.
Friday Night
 
Mostly clear, with a low around 54.
Independence Day
 
Sunny, with a high near 81.
Saturday Night
 
Mostly clear, with a low around 53.
Sunday
 
Mostly sunny, with a high near 78.
Sunday Night
 
Partly cloudy, with a low around 53.
Monday
 
Mostly sunny, with a high near 78.

 

Forecast from NOAA-NWS for Guerneville CA.