National Weather Service Forecast for: Clearlake CA
Issued by: National Weather Service Eureka, CA
Updated: 2:10 pm PDT Jun 19, 2026
 
Tonight

Tonight: Patchy fog after 2am. Otherwise, mostly clear, with a low around 49. South wind 5 to 7 mph becoming calm in the evening.
Mostly Clear
then Patchy
Fog
 Saturday

Saturday: Patchy fog before 8am. Otherwise, sunny, with a high near 83. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Patchy Fog
then Sunny
 Saturday
Night
Saturday Night: Mostly clear, with a low around 54. West wind 5 to 8 mph becoming calm in the evening.
Mostly Clear

 Sunday

Sunday: Sunny, with a high near 91. Calm wind becoming south southwest around 5 mph in the afternoon.
Sunny

 Sunday
Night
Sunday Night: Clear, with a low around 57. West southwest wind 5 to 8 mph becoming calm in the evening.
Clear

 Monday

Monday: Sunny, with a high near 96. Calm wind becoming south around 5 mph in the afternoon.
Sunny

 Monday
Night
Monday Night: Clear, with a low around 57.
Clear

 Tuesday

Tuesday: Sunny, with a high near 94.
Sunny

 Tuesday
Night
Tuesday Night: Clear, with a low around 58.
Clear
Lo 49 °F Hi 83 °F Lo 54 °F Hi 91 °F Lo 57 °F Hi 96 °F Lo 57 °F Hi 94 °F Lo 58 °F

 

Tonight
 
 Patchy fog after 2am. Otherwise, mostly clear, with a low around 49. South wind 5 to 7 mph becoming calm in the evening.
Saturday
 
 Patchy fog before 8am. Otherwise, sunny, with a high near 83. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Saturday Night
 
 Mostly clear, with a low around 54. West wind 5 to 8 mph becoming calm in the evening.
Sunday
 
 Sunny, with a high near 91. Calm wind becoming south southwest around 5 mph in the afternoon.
Sunday Night
 
 Clear, with a low around 57. West southwest wind 5 to 8 mph becoming calm in the evening.
Monday
 
 Sunny, with a high near 96. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
 
 Clear, with a low around 57.
Tuesday
 
 Sunny, with a high near 94.
Tuesday Night
 
 Clear, with a low around 58.
Wednesday
 
 Sunny, with a high near 95.
Wednesday Night
 
 Clear, with a low around 57.
Thursday
 
 Sunny, with a high near 96.
Thursday Night
 
 Clear, with a low around 57.
Friday
 
 Sunny, with a high near 92.

 

Forecast from NOAA-NWS for Clearlake CA.