National Weather Service Forecast for: Clearlake CA
Issued by: National Weather Service Eureka, CA
Updated: 10:05 am PDT Oct 6, 2026
 
Today

Today: Sunny, with a high near 98. Calm wind becoming west 5 to 7 mph in the afternoon.
Sunny
 Tonight

Tonight: Clear, with a low around 59. West wind 5 to 7 mph becoming calm in the evening.
Clear
 Wednesday

Wednesday: Sunny, with a high near 97. Calm wind.
Sunny
 Wednesday
Night
Wednesday Night: Clear, with a low around 58. West wind around 6 mph becoming calm in the evening.
Clear
 Thursday

Thursday: Sunny, with a high near 98. Light and variable wind.
Sunny
 Thursday
Night
Thursday Night: Clear, with a low around 61. Light and variable wind.
Clear
 Friday

Friday: Sunny, with a high near 95.
Sunny
 Friday
Night
Friday Night: Clear, with a low around 52.
Clear
 Saturday

Saturday: Sunny, with a high near 80.
Sunny
Hi 98 °F Lo 59 °F Hi 97 °F Lo 58 °F Hi 98 °F Lo 61 °F Hi 95 °F Lo 52 °F Hi 80 °F

Heat Advisory
 

Today
 
 Sunny, with a high near 98. Calm wind becoming west 5 to 7 mph in the afternoon.
Tonight
 
 Clear, with a low around 59. West wind 5 to 7 mph becoming calm in the evening.
Wednesday
 
 Sunny, with a high near 97. Calm wind.
Wednesday Night
 
 Clear, with a low around 58. West wind around 6 mph becoming calm in the evening.
Thursday
 
 Sunny, with a high near 98. Light and variable wind.
Thursday Night
 
 Clear, with a low around 61. Light and variable wind.
Friday
 
 Sunny, with a high near 95.
Friday Night
 
 Clear, with a low around 52.
Saturday
 
 Sunny, with a high near 80.
Saturday Night
 
 Mostly clear, with a low around 46.
Sunday
 
 Sunny, with a high near 75.
Sunday Night
 
 Mostly clear, with a low around 46.
Columbus Day
 
 Sunny, with a high near 74.

 

Forecast from NOAA-NWS for Clearlake CA.