Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

Lat: 37.66083°NLon: 122.11833°WElev: 46.0ft.

Clear

53°F

12°C

Humidity 82%
Wind Speed NW 5 MPH
Barometer 29.97 in (1014.9 mb)
Dewpoint 48°F (9°C)
Visibility 8.00 mi
Last update 22 Mar 02:54 AM PDT
Extended Forecast for

Castro Valley CA

  • Overnight

    Overnight: Partly cloudy, with a low around 51. Light south wind.

    Low: 51 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 78. Calm wind becoming west 5 to 8 mph in the afternoon.

    High: 78 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 50. South southwest wind around 7 mph.

    Low: 50 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 78. West wind 3 to 8 mph.

    High: 78 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 53. West wind 5 to 9 mph.

    Low: 53 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 51. Light south wind.
Sunday
Sunny, with a high near 78. Calm wind becoming west 5 to 8 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 50. South southwest wind around 7 mph.
Monday
Sunny, with a high near 78. West wind 3 to 8 mph.
Monday Night
Mostly clear, with a low around 53. West wind 5 to 9 mph.
Tuesday
Sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 52.
Wednesday
Sunny, with a high near 77.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Mostly sunny, with a high near 77.
Thursday Night
Mostly cloudy, with a low around 51.
Friday
Partly sunny, with a high near 80.
Friday Night
Mostly cloudy, with a low around 52.
Saturday
Mostly sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
Castro Valley CA
 37.72°N 122.05°W (Elev. 397 ft)
2:27 am PDT Mar 22, 2026
3am PDT Mar 22, 2026-6pm PDT Mar 28, 2026
 
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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