| National Weather Service Forecast for:
Clearlake CA Issued by: National Weather Service Eureka, CA |
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| Updated: 2:46 pm PDT Aug 19, 2026 | ||||||||||||||||||
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| Overnight |
Mostly clear, with a low around 60. Calm wind. |
| Thursday |
Increasing clouds, with a high near 95. Calm wind becoming west southwest around 5 mph in the afternoon. |
| Thursday Night |
Mostly cloudy, with a low around 61. West southwest wind around 5 mph becoming calm in the evening. |
| Friday |
Mostly cloudy, then gradually becoming sunny, with a high near 91. Calm wind becoming southwest 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph. |
| Friday Night |
Mostly clear, with a low around 55. West southwest wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 20 mph. |
| Saturday |
Sunny, with a high near 89. Calm wind becoming west southwest 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph. |
| Saturday Night |
Mostly clear, with a low around 56. |
| Sunday |
Sunny, with a high near 93. |
| Sunday Night |
Mostly clear, with a low around 58. |
| Monday |
Mostly sunny, with a high near 91. |
| Monday Night |
Partly cloudy, with a low around 56. |
| Tuesday |
Mostly sunny, with a high near 90. |
| Tuesday Night |
Partly cloudy, with a low around 57. |
| Wednesday |
Mostly sunny, with a high near 91. |
Forecast from NOAA-NWS for Clearlake CA.
