Thunderstorms and Heavy Rains Across Portions of the Central and Eastern US; Heat Expands to Portions of the East

Widespread showers and thunderstorms, some severe, may produce heavy downpours and flash flooding across much of the eastern and central U.S. Dangerous heat will continue in the Pacific Northwest and expand across portions of the East. Deep tropical moisture and associated thunderstorms will bring heavy rainfall and localized flash flooding across portions of Florida into the central Gulf Coast. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Partly Cloudy

61°F

16°C

Humidity 82%
Wind Speed W 10 MPH
Barometer 29.9 in (1012.53 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 15 Jul 10:20 PM PDT
Extended Forecast for

Castro Valley CA

  • Tonight

    Tonight: Mostly cloudy, with a low around 56. West wind 7 to 9 mph.

    Low: 56 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Cloudy through mid morning, then gradual clearing, with a high near 72. West wind 6 to 10 mph, with gusts as high as 18 mph.

    High: 72 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog between midnight and 2am.  Otherwise, increasing clouds, with a low around 56. West southwest wind 6 to 10 mph.

    Low: 56 °F

    Partly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: Patchy fog before 8am.  Otherwise, cloudy through mid morning, then gradual clearing, with a high near 75. Light west southwest wind becoming west 5 to 10 mph in the morning.

    High: 75 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Patchy fog between midnight and 3am.  Otherwise, partly cloudy, with a low around 56. West southwest wind 5 to 10 mph.

    Low: 56 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 9am.  Otherwise, mostly sunny, with a high near 75.

    High: 75 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Patchy fog after 5am.  Otherwise, partly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 9am.  Otherwise, mostly sunny, with a high near 75.

    High: 75 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 56. West wind 7 to 9 mph.
Wednesday
Cloudy through mid morning, then gradual clearing, with a high near 72. West wind 6 to 10 mph, with gusts as high as 18 mph.
Wednesday Night
Patchy fog between midnight and 2am. Otherwise, increasing clouds, with a low around 56. West southwest wind 6 to 10 mph.
Thursday
Patchy fog before 8am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 75. Light west southwest wind becoming west 5 to 10 mph in the morning.
Thursday Night
Patchy fog between midnight and 3am. Otherwise, partly cloudy, with a low around 56. West southwest wind 5 to 10 mph.
Friday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 75.
Friday Night
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 55.
Saturday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 75.
Saturday Night
Partly cloudy, with a low around 55.
Sunday
Mostly sunny, with a high near 77.
Sunday Night
Partly cloudy, with a low around 56.
Monday
Patchy fog. Otherwise, mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 56.
Tuesday
Patchy fog. Otherwise, mostly sunny, with a high near 73.
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ABOUT THIS FORECAST

 
Point Forecast:
Castro Valley CA
 37.69°N 122.05°W (Elev. 364 ft)
1:26 pm PDT Jul 15, 2025
10pm PDT Jul 15, 2025-6pm PDT Jul 22, 2025
 
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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