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

Hazardous Weather Conditions

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

90°F

32°C

Humidity 20%
Wind Speed N 6 MPH
Barometer NA
Dewpoint 44°F (7°C)
Visibility NA
Heat Index86°F (30°C)
Last update 03 Oct 04:28 PM PDT
Extended Forecast for

Bethel Island CA

Heat Advisory October 4, 06:05am until October 7, 10:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory October 4, 06:05am until October 7, 10:00pm

    NOW until 10:00pm Wed

    Heat Advisory

  • Today

    High: 94 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 67. Calm wind becoming west around 5 mph.

    Low: 67 °F

    Decreasing
    Clouds

  • Monday

    Monday: Sunny and hot, with a high near 97. West northwest wind 3 to 6 mph.

    High: 97 °F

    Hot

  • Monday Night

    Monday Night: Clear, with a low around 68. West wind 5 to 7 mph.

    Low: 68 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 98. Northwest wind 5 to 7 mph.

    High: 98 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 68.

    Low: 68 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

  • Wednesday Night

    Wednesday Night: Clear, with a low around 65.

    Low: 65 °F

    Clear

Detailed Forecast

Today
Partly sunny, with a high near 94. Calm wind becoming northwest around 5 mph.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 67. Calm wind becoming west around 5 mph.
Monday
Sunny and hot, with a high near 97. West northwest wind 3 to 6 mph.
Monday Night
Clear, with a low around 68. West wind 5 to 7 mph.
Tuesday
Sunny and hot, with a high near 98. Northwest wind 5 to 7 mph.
Tuesday Night
Clear, with a low around 68.
Wednesday
Sunny and hot, with a high near 98.
Wednesday Night
Clear, with a low around 65.
Thursday
Sunny, with a high near 95.
Thursday Night
Clear, with a low around 65.
Friday
Sunny, with a high near 89.
Friday Night
Mostly clear, with a low around 61.
Saturday
Sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Bethel Island CA
 38.03°N 121.64°W (Elev. 3 ft)
Last Update:
1:46 am PDT Oct 4, 2026
Forecast Valid:
6am PDT Oct 4, 2026-6pm PDT Oct 10, 2026
 
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Additional Resources

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Chance of Precipitation