Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Severe thunderstorms are forecast from parts of the central High Plains into the Upper Midwest, and across parts of the Northeast. Critical fire weather conditions will continue across portions of the Four Corners and Great Basin. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Clear

68°F

20°C

Humidity 60%
Wind Speed W 13 MPH
Barometer 29.86 in (1011.18 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 30 Jun 06:20 PM PDT
Extended Forecast for

Castro Valley CA

  • Tonight

    Tonight: Mostly clear, with a low around 54. Southwest wind 6 to 10 mph.

    Low: 54 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 74. South wind 5 to 10 mph becoming west in the afternoon.

    High: 74 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 55. Southwest wind 7 to 10 mph.

    Low: 55 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Cloudy through mid morning, then gradual clearing, with a high near 71. South southwest wind 8 to 11 mph, with gusts as high as 18 mph.

    High: 71 °F

    Gradual
    Clearing

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 54. Southwest wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 54 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Independence Day

    Independence Day: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 54. Southwest wind 6 to 10 mph.
Wednesday
Sunny, with a high near 74. South wind 5 to 10 mph becoming west in the afternoon.
Wednesday Night
Increasing clouds, with a low around 55. Southwest wind 7 to 10 mph.
Thursday
Cloudy through mid morning, then gradual clearing, with a high near 71. South southwest wind 8 to 11 mph, with gusts as high as 18 mph.
Thursday Night
Mostly cloudy, with a low around 54. Southwest wind 8 to 11 mph, with gusts as high as 21 mph.
Friday
Mostly sunny, with a high near 75.
Friday Night
Partly cloudy, with a low around 56.
Independence Day
Mostly sunny, with a high near 74.
Saturday Night
Partly cloudy, with a low around 56.
Sunday
Partly sunny, with a high near 74.
Sunday Night
Partly cloudy, with a low around 55.
Monday
Partly sunny, with a high near 71.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
Partly sunny, with a high near 72.
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ABOUT THIS FORECAST

 
Point Forecast:
Castro Valley CA
 37.71°N 122.08°W (Elev. 397 ft)
1:26 pm PDT Jun 30, 2026
6pm PDT Jun 30, 2026-6pm PDT Jul 7, 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