National Weather Service Forecast for: Clearlake CA
Issued by: National Weather Service Eureka, CA
Updated: 2:10 am PDT May 4, 2026
 
Today

Today: A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then showers likely after 5pm. Mostly cloudy, with a high near 60. West wind 5 to 8 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers
Likely
 Tonight

Tonight: Showers likely and possibly a thunderstorm before 11pm, then a chance of showers. Patchy fog after 2am. Otherwise, cloudy, with a low around 46. West wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Showers
Likely and
Patchy Fog
 Tuesday

Tuesday: Patchy fog before 11am. Otherwise, partly sunny, with a high near 68. Calm wind becoming west southwest around 5 mph in the afternoon.
Patchy Fog
then Mostly
Sunny
 Tuesday
Night
Tuesday Night: Patchy fog after 2am. Otherwise, partly cloudy, with a low around 47. West wind 5 to 7 mph becoming calm in the evening.
Partly Cloudy
then Patchy
Fog
 Wednesday

Wednesday: Patchy fog before 8am. Otherwise, sunny, with a high near 79. Calm wind becoming west southwest around 5 mph in the afternoon.
Patchy Fog
then Sunny
 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 50. West wind 5 to 7 mph becoming calm in the evening.
Mostly Clear

 Thursday

Thursday: Sunny, with a high near 81.
Sunny

 Thursday
Night
Thursday Night: Mostly clear, with a low around 48.
Mostly Clear

 Friday

Friday: Sunny, with a high near 82.
Sunny
Hi 60 °F Lo 46 °F Hi 68 °F Lo 47 °F Hi 79 °F Lo 50 °F Hi 81 °F Lo 48 °F Hi 82 °F

 

Today
 
 A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then showers likely after 5pm. Mostly cloudy, with a high near 60. West wind 5 to 8 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
 
 Showers likely and possibly a thunderstorm before 11pm, then a chance of showers. Patchy fog after 2am. Otherwise, cloudy, with a low around 46. West wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
 
 Patchy fog before 11am. Otherwise, partly sunny, with a high near 68. Calm wind becoming west southwest around 5 mph in the afternoon.
Tuesday Night
 
 Patchy fog after 2am. Otherwise, partly cloudy, with a low around 47. West wind 5 to 7 mph becoming calm in the evening.
Wednesday
 
 Patchy fog before 8am. Otherwise, sunny, with a high near 79. Calm wind becoming west southwest around 5 mph in the afternoon.
Wednesday Night
 
 Mostly clear, with a low around 50. West wind 5 to 7 mph becoming calm in the evening.
Thursday
 
 Sunny, with a high near 81.
Thursday Night
 
 Mostly clear, with a low around 48.
Friday
 
 Sunny, with a high near 82.
Friday Night
 
 Clear, with a low around 54.
Saturday
 
 Sunny, with a high near 89.
Saturday Night
 
 Clear, with a low around 58.
Sunday
 
 Sunny, with a high near 93.

 

Forecast from NOAA-NWS for Clearlake CA.