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

BLACK DIAMOND (PIBC1)

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

NA

53°F

12°C

Humidity 73%
Wind Speed S 15 MPH
Barometer NA
Dewpoint 44°F (7°C)
Visibility NA
Last update 19 Oct 10:28 AM PDT
Extended Forecast for

Bethel Island CA

  • Today

    Today: Sunny, with a high near 72. West wind 9 to 11 mph, with gusts as high as 21 mph.

    High: 72 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 48. West wind 5 to 9 mph becoming calm after midnight.

    Low: 48 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 68. Calm wind becoming north northwest around 5 mph in the afternoon.

    High: 68 °F

    Patchy Fog
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers, mainly after 11pm. Mostly cloudy, with a low around 52. Light west northwest wind. New precipitation amounts of less than a tenth of an inch possible.

    Low: 52 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 50 percent chance of showers. Mostly cloudy, with a high near 70. West northwest wind around 6 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 70 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 51.

    Low: 51 °F

    Chance
    Showers

  • Thursday

    Thursday: A 30 percent chance of showers, mainly before 11am. Partly sunny, with a high near 70.

    High: 70 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 8am. Otherwise, sunny, with a high near 72.

    High: 72 °F

    Patchy Fog
    then Sunny

Detailed Forecast

Today
Sunny, with a high near 72. West wind 9 to 11 mph, with gusts as high as 21 mph.
Tonight
Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 48. West wind 5 to 9 mph becoming calm after midnight.
Tuesday
Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 68. Calm wind becoming north northwest around 5 mph in the afternoon.
Tuesday Night
A 50 percent chance of showers, mainly after 11pm. Mostly cloudy, with a low around 52. Light west northwest wind. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A 50 percent chance of showers. Mostly cloudy, with a high near 70. West northwest wind around 6 mph. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 51.
Thursday
A 30 percent chance of showers, mainly before 11am. Partly sunny, with a high near 70.
Thursday Night
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 48.
Friday
Patchy fog before 8am. Otherwise, sunny, with a high near 72.
Friday Night
Clear, with a low around 47.
Saturday
Sunny, with a high near 72.
Saturday Night
A slight chance of rain. Mostly clear, with a low around 48.
Sunday
Sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Bethel Island CA
 38.01°N 121.64°W (Elev. 3 ft)
Last Update:
2:37 am PDT Oct 19, 2026
Forecast Valid:
10am PDT Oct 19, 2026-6pm PDT Oct 25, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation