National Weather Service Forecast for: Guerneville CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:26 pm PDT Jun 19, 2026
 
Tonight

Tonight: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 52. Light and variable wind.
Patchy Fog

 Saturday

Saturday: Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 75. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Patchy Fog
then Sunny
 Saturday
Night
Saturday Night: Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 52. West southwest wind around 5 mph becoming calm in the evening.
Patchy Fog

 Sunday

Sunday: Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 81. Calm wind becoming southwest around 6 mph in the afternoon.
Patchy Fog
then Sunny
 Sunday
Night
Sunday Night: Patchy fog after midnight. Otherwise, mostly clear, with a low around 52. Southwest wind around 5 mph becoming calm in the evening.
Mostly Clear
then Patchy
Fog
 Monday

Monday: Mostly sunny, with a high near 81.
Mostly Sunny

 Monday
Night
Monday Night: Patchy fog after midnight. Otherwise, mostly clear, with a low around 53.
Mostly Clear
then Patchy
Fog
 Tuesday

Tuesday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 81.
Patchy Fog
then Sunny
 Tuesday
Night
Tuesday Night: Patchy fog after midnight. Otherwise, mostly clear, with a low around 53.
Mostly Clear
then Patchy
Fog
Lo 52 °F Hi 75 °F Lo 52 °F Hi 81 °F Lo 52 °F Hi 81 °F Lo 53 °F Hi 81 °F Lo 53 °F

 

Tonight
 
 Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 52. Light and variable wind.
Saturday
 
 Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 75. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Saturday Night
 
 Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 52. West southwest wind around 5 mph becoming calm in the evening.
Sunday
 
 Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 81. Calm wind becoming southwest around 6 mph in the afternoon.
Sunday Night
 
 Patchy fog after midnight. Otherwise, mostly clear, with a low around 52. Southwest wind around 5 mph becoming calm in the evening.
Monday
 
 Mostly sunny, with a high near 81.
Monday Night
 
 Patchy fog after midnight. Otherwise, mostly clear, with a low around 53.
Tuesday
 
 Patchy fog before 8am. Otherwise, mostly sunny, with a high near 81.
Tuesday Night
 
 Patchy fog after midnight. Otherwise, mostly clear, with a low around 53.
Wednesday
 
 Sunny, with a high near 83.
Wednesday Night
 
 Patchy fog. Otherwise, mostly clear, with a low around 54.
Thursday
 
 Sunny, with a high near 83.
Thursday Night
 
 Mostly clear, with a low around 54.
Friday
 
 Sunny, with a high near 85.

 

Forecast from NOAA-NWS for Guerneville CA.