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

61°F

16°C

Humidity 67%
Wind Speed W 9 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 21 Mar 08:35 PM PDT
Extended Forecast for

2 Miles SW Castro Valley CA

  • Tonight

    Tonight: Mostly clear, with a low around 51. Southwest wind 5 to 7 mph becoming calm  after midnight.

    Low: 51 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 77. Calm wind becoming west 5 to 8 mph in the afternoon.

    High: 77 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 51. Southwest wind 5 to 7 mph.

    Low: 51 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 77. West wind 3 to 7 mph.

    High: 77 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 53. Southwest wind 3 to 8 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 53.

    Low: 53 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 50.

    Low: 50 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 51. Southwest wind 5 to 7 mph becoming calm after midnight.
Sunday
Sunny, with a high near 77. Calm wind becoming west 5 to 8 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 51. Southwest wind 5 to 7 mph.
Monday
Sunny, with a high near 77. West wind 3 to 7 mph.
Monday Night
Mostly clear, with a low around 53. Southwest wind 3 to 8 mph.
Tuesday
Sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 53.
Wednesday
Mostly sunny, with a high near 77.
Wednesday Night
Mostly clear, with a low around 50.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
Mostly cloudy, with a low around 51.
Friday
Mostly sunny, with a high near 79.
Friday Night
Mostly cloudy, with a low around 52.
Saturday
Mostly sunny, with a high near 78.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Castro Valley CA
 37.69°N 122.07°W (Elev. 197 ft)
8:26 pm PDT Mar 21, 2026
8pm PDT Mar 21, 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