National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Fire Weather Issues; Pacific System Moving Inland

Dry fuels, strong winds and dry weather will continue to bring elevated to critical fire weather conditions to the areas of the Plains, Midwest and Southeast today. A Pacific storm system will bring low elevation rain and heavy high elevation mountain snow to California through early week, expanding into the Pacific Northwest, Great Basin, and southern California on Tuesday. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

Lat: 37.95°NLon: 121.88444°WElev: 1600.0ft.

NA

55°F

13°C

Humidity 73%
Wind Speed S 9 MPH
Barometer NA
Dewpoint 46°F (8°C)
Visibility NA
Last update 20 Apr 03:28 PM PDT
Extended Forecast for

Bethel Island CA

  • This Afternoon

    This Afternoon: A chance of rain before 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a steady temperature around 68. West wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 68 °F

    Chance
    Showers

  • Tonight

    Tonight: Rain and thunderstorms. Low around 55. West wind 5 to 7 mph becoming calm. Winds could gust as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 55 °F

    Rain

  • Tuesday

    Tuesday: Rain likely and possibly a thunderstorm, then showers and possibly a thunderstorm after 10am. High near 62. Southeast wind 6 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 62 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 8pm, then rain likely, mainly between 8pm and 11pm. Mostly cloudy, with a low around 49. Southwest wind 7 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 49 °F

    Showers
    Likely then
    Chance Rain

  • Wednesday

    Wednesday: A 30 percent chance of rain before 11am. Mostly sunny, with a high near 65. South wind around 7 mph becoming west in the afternoon. New precipitation amounts of less than a tenth of an inch possible.

    High: 65 °F

    Chance Rain
    then Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A chance of rain before 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a steady temperature around 68. West wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Rain and thunderstorms. Low around 55. West wind 5 to 7 mph becoming calm. Winds could gust as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
Rain likely and possibly a thunderstorm, then showers and possibly a thunderstorm after 10am. High near 62. Southeast wind 6 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers likely and possibly a thunderstorm before 8pm, then rain likely, mainly between 8pm and 11pm. Mostly cloudy, with a low around 49. Southwest wind 7 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A 30 percent chance of rain before 11am. Mostly sunny, with a high near 65. South wind around 7 mph becoming west in the afternoon. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Mostly clear, with a low around 47.
Thursday
Sunny, with a high near 71.
Thursday Night
Partly cloudy, with a low around 50.
Friday
Mostly sunny, with a high near 73.
Friday Night
Partly cloudy, with a low around 51.
Saturday
Mostly sunny, with a high near 71.
Saturday Night
Partly cloudy, with a low around 52.
Sunday
Mostly sunny, with a high near 70.
Sunday Night
Partly cloudy, with a low around 50.
Monday
Mostly sunny, with a high near 72.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Bethel Island CA
 38.03°N 121.64°W (Elev. 3 ft)
Last Update:
1:26 pm PDT Apr 20, 2026
Forecast Valid:
4pm PDT Apr 20, 2026-6pm PDT Apr 27, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation