National Weather Service Forecast for: Bethel Island CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 9:46 am PDT May 4, 2026
 
Today

Today: A slight chance of rain between 2pm and 4pm. Mostly cloudy, with a high near 66. West wind 6 to 9 mph. Chance of precipitation is 20%.
Partly Sunny
then Slight
Chance Rain
 Tonight

Tonight: Rain likely, mainly between midnight and 5am. Cloudy, with a low around 54. West wind 6 to 9 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain Likely

 Tuesday

Tuesday: Cloudy, then gradually becoming mostly sunny, with a high near 67. West wind 5 to 9 mph.
Decreasing
Clouds
 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 53. West southwest wind 6 to 9 mph.
Mostly Clear

 Wednesday

Wednesday: Sunny, with a high near 77. West wind 3 to 7 mph.
Sunny

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 52.
Mostly Clear

 Thursday

Thursday: Sunny, with a high near 80.
Sunny

 Thursday
Night
Thursday Night: Mostly clear, with a low around 51.
Mostly Clear

 Friday

Friday: Sunny, with a high near 80.
Sunny
Hi 66 °F Lo 54 °F Hi 67 °F Lo 53 °F Hi 77 °F Lo 52 °F Hi 80 °F Lo 51 °F Hi 80 °F

 

Today
 
 A slight chance of rain between 2pm and 4pm. Mostly cloudy, with a high near 66. West wind 6 to 9 mph. Chance of precipitation is 20%.
Tonight
 
 Rain likely, mainly between midnight and 5am. Cloudy, with a low around 54. West wind 6 to 9 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
 
 Cloudy, then gradually becoming mostly sunny, with a high near 67. West wind 5 to 9 mph.
Tuesday Night
 
 Mostly clear, with a low around 53. West southwest wind 6 to 9 mph.
Wednesday
 
 Sunny, with a high near 77. West wind 3 to 7 mph.
Wednesday Night
 
 Mostly clear, with a low around 52.
Thursday
 
 Sunny, with a high near 80.
Thursday Night
 
 Mostly clear, with a low around 51.
Friday
 
 Sunny, with a high near 80.
Friday Night
 
 Clear, with a low around 55.
Saturday
 
 Sunny, with a high near 89.
Saturday Night
 
 Clear, with a low around 57.
Sunday
 
 Sunny, with a high near 94.

 

Forecast from NOAA-NWS for Bethel Island CA.