Early Spring Heat Wave in the Southwest U.S.; Critical Fire Weather in the Central Rockies and Plains

An unusual early Spring heat wave will continue much above-normal temperatures over the Southwest U.S. through early next week. Many locations are likely to set records for the highest-ever March temperature. Periods of critical fire weather will persist from the central Rockies to the central Plains through Saturday as gusty winds and low relative humidity continue. Read More >

Hazardous Weather Conditions

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Clear

84°F

29°C

Humidity 42%
Wind Speed W 11 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 19 Mar 03:35 PM PDT
Extended Forecast for

2 Miles SW Castro Valley CA

Heat Advisory March 19, 03:57pm until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory March 19, 03:57pm until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Tonight

    Low: 58 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 93. Calm wind becoming west around 6 mph in the afternoon.

    High: 93 °F

    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 57. Light southwest wind.

    Low: 57 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly sunny, with a high near 81. Calm wind becoming west 5 to 8 mph in the afternoon.

    High: 81 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 52. West southwest wind 5 to 9 mph.

    Low: 52 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Sunday Night

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

    Low: 50 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

Detailed Forecast

Tonight
Clear, with a low around 58. West northwest wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 93. Calm wind becoming west around 6 mph in the afternoon.
Friday Night
Increasing clouds, with a low around 57. Light southwest wind.
Saturday
Mostly sunny, with a high near 81. Calm wind becoming west 5 to 8 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 52. West southwest wind 5 to 9 mph.
Sunday
Sunny, with a high near 80.
Sunday Night
Mostly clear, with a low around 50.
Monday
Sunny, with a high near 77.
Monday Night
Mostly clear, with a low around 53.
Tuesday
Sunny, with a high near 78.
Tuesday Night
Mostly clear, with a low around 52.
Wednesday
Sunny, with a high near 74.
Wednesday Night
Mostly clear, with a low around 50.
Thursday
Sunny, with a high near 79.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Castro Valley CA
 37.69°N 122.1°W (Elev. 174 ft)
2:37 pm PDT Mar 19, 2026
3pm PDT Mar 19, 2026-6pm PDT Mar 26, 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