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

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

66°F

19°C

Humidity 63%
Wind Speed N 0 MPH
Barometer 29.9 in (1012.53 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 20 Mar 11:55 PM PDT
Extended Forecast for

2 Miles SW Castro Valley CA

  • Overnight

    Overnight: Partly cloudy, with a low around 57. Light west wind.

    Low: 57 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 80. Light west wind becoming west southwest 5 to 10 mph in the afternoon.

    High: 80 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 51. Southwest wind 3 to 8 mph.

    Low: 51 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 78. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 78 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 50. Southwest wind 3 to 8 mph.

    Low: 50 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 57. Light west wind.
Saturday
Mostly sunny, with a high near 80. Light west wind becoming west southwest 5 to 10 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 51. Southwest wind 3 to 8 mph.
Sunday
Sunny, with a high near 78. Calm wind becoming west 5 to 7 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 50. Southwest wind 3 to 8 mph.
Monday
Sunny, with a high near 79.
Monday Night
Mostly clear, with a low around 53.
Tuesday
Sunny, with a high near 82.
Tuesday Night
Mostly clear, with a low around 53.
Wednesday
Sunny, with a high near 76.
Wednesday Night
Mostly clear, with a low around 51.
Thursday
Mostly sunny, with a high near 79.
Thursday Night
Partly cloudy, with a low around 53.
Friday
Partly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Castro Valley CA
 37.69°N 122.07°W (Elev. 197 ft)
Last Update:
8:21 pm PDT Mar 20, 2026
Forecast Valid:
12am PDT Mar 21, 2026-6pm PDT Mar 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