National Weather Service Forecast for: Bethel Island CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 11:55 pm PST Dec 22, 2025
 
Overnight

Overnight: A 20 percent chance of rain. Areas of dense fog. Otherwise, cloudy, with a low around 53. Light and variable wind.
Slight Chance
Rain and
Areas Dense
Fog
 Tuesday

Tuesday: A 30 percent chance of rain, mainly after 4pm. Areas of fog before 11am. Otherwise, cloudy, with a high near 61. Light southeast wind becoming south southeast 9 to 14 mph in the morning. Winds could gust as high as 25 mph.
Chance Rain
and Areas Fog

 Tuesday
Night
Tuesday Night: Rain likely, mainly after 8pm. Cloudy, with a low around 55. Breezy, with a southeast wind 18 to 25 mph, with gusts as high as 50 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain Likely
and Breezy

 Wednesday

Wednesday: Rain, mainly before 4pm, then showers and possibly a thunderstorm after 4pm. High near 59. Light south wind becoming southeast 5 to 10 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Showers

 Wednesday
Night
Wednesday Night: Showers and possibly a thunderstorm before 7pm, then rain after 7pm. Low around 53. Breezy, with a south southeast wind 14 to 22 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Showers and
Breezy

 Christmas
Day
Christmas Day: Rain before 10am, then showers and possibly a thunderstorm after 10am. High near 56. Breezy. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Showers and
Breezy

 Thursday
Night
Thursday Night: Showers and possibly a thunderstorm before 1am, then rain after 1am. Low around 48. Chance of precipitation is 100%.
Showers

 Friday

Friday: Rain. Cloudy, with a high near 52.
Rain

 Friday
Night
Friday Night: Rain likely, mainly before 10pm. Patchy fog before 10pm, then patchy fog after 3am. Otherwise, mostly cloudy, with a low around 44.
Rain Likely
and Patchy
Fog
Lo 53 °F Hi 61 °F Lo 55 °F Hi 59 °F Lo 53 °F Hi 56 °F Lo 48 °F Hi 52 °F Lo 44 °F

Flood Watch
Wind Advisory
 

Overnight
 
 A 20 percent chance of rain. Areas of dense fog. Otherwise, cloudy, with a low around 53. Light and variable wind.
Tuesday
 
 A 30 percent chance of rain, mainly after 4pm. Areas of fog before 11am. Otherwise, cloudy, with a high near 61. Light southeast wind becoming south southeast 9 to 14 mph in the morning. Winds could gust as high as 25 mph.
Tuesday Night
 
 Rain likely, mainly after 8pm. Cloudy, with a low around 55. Breezy, with a southeast wind 18 to 25 mph, with gusts as high as 50 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
 
 Rain, mainly before 4pm, then showers and possibly a thunderstorm after 4pm. High near 59. Light south wind becoming southeast 5 to 10 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
 
 Showers and possibly a thunderstorm before 7pm, then rain after 7pm. Low around 53. Breezy, with a south southeast wind 14 to 22 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Christmas Day
 
 Rain before 10am, then showers and possibly a thunderstorm after 10am. High near 56. Breezy. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
 
 Showers and possibly a thunderstorm before 1am, then rain after 1am. Low around 48. Chance of precipitation is 100%.
Friday
 
 Rain. Cloudy, with a high near 52.
Friday Night
 
 Rain likely, mainly before 10pm. Patchy fog before 10pm, then patchy fog after 3am. Otherwise, mostly cloudy, with a low around 44.
Saturday
 
 Patchy fog before 10am. Otherwise, partly sunny, with a high near 52.
Saturday Night
 
 Mostly clear, with a low around 39.
Sunday
 
 Sunny, with a high near 49.
Sunday Night
 
 Patchy fog. Otherwise, mostly clear, with a low around 39.
Monday
 
 Areas of fog. Otherwise, partly sunny, with a high near 50.

 

Forecast from NOAA-NWS for Bethel Island CA.