National Weather Service Forecast for: Bethel Island CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:26 am PDT Jun 22, 2026
 
Overnight

Overnight: Clear, with a low around 56. Light west northwest wind.
Clear
 Monday

Monday: Sunny, with a high near 87. Light west northwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 20 mph.
Sunny
 Monday
Night
Monday Night: Clear, with a low around 56. West wind 5 to 11 mph, with gusts as high as 21 mph.
Clear
 Tuesday

Tuesday: Sunny, with a high near 88. West northwest wind 5 to 11 mph, with gusts as high as 20 mph.
Sunny
 Tuesday
Night
Tuesday Night: Clear, with a low around 57. West wind 5 to 11 mph, with gusts as high as 21 mph.
Clear
 Wednesday

Wednesday: Sunny, with a high near 88.
Sunny
 Wednesday
Night
Wednesday Night: Clear, with a low around 57.
Clear
 Thursday

Thursday: Sunny, with a high near 86.
Sunny
 Thursday
Night
Thursday Night: Clear, with a low around 57.
Clear
Lo 56 °F Hi 87 °F Lo 56 °F Hi 88 °F Lo 57 °F Hi 88 °F Lo 57 °F Hi 86 °F Lo 57 °F

 

Overnight
 
 Clear, with a low around 56. Light west northwest wind.
Monday
 
 Sunny, with a high near 87. Light west northwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 20 mph.
Monday Night
 
 Clear, with a low around 56. West wind 5 to 11 mph, with gusts as high as 21 mph.
Tuesday
 
 Sunny, with a high near 88. West northwest wind 5 to 11 mph, with gusts as high as 20 mph.
Tuesday Night
 
 Clear, with a low around 57. West wind 5 to 11 mph, with gusts as high as 21 mph.
Wednesday
 
 Sunny, with a high near 88.
Wednesday Night
 
 Clear, with a low around 57.
Thursday
 
 Sunny, with a high near 86.
Thursday Night
 
 Clear, with a low around 57.
Friday
 
 Sunny, with a high near 81.
Friday Night
 
 Mostly clear, with a low around 58.
Saturday
 
 Sunny, with a high near 80.
Saturday Night
 
 Clear, with a low around 56.
Sunday
 
 Sunny, with a high near 87.

 

Forecast from NOAA-NWS for Bethel Island CA.