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.

Mostly Cloudy

60°F

16°C

Humidity 83%
Wind Speed W 11 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 16 Jul 12:23 AM PDT
Extended Forecast for

Castro Valley CA

  • Overnight

    Overnight: Patchy fog before 4am, then patchy fog after 5am.  Otherwise, mostly cloudy, with a low around 56. West wind around 8 mph.

    Low: 56 °F

    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog between 7am and 9am.  Otherwise, cloudy through mid morning, then gradual clearing, with a high near 72. West southwest wind 6 to 10 mph, with gusts as high as 18 mph.

    High: 72 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 11pm.  Otherwise, increasing clouds, with a low around 55. West southwest wind 5 to 9 mph.

    Low: 55 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 9am.  Otherwise, cloudy through mid morning, then gradual clearing, with a high near 75. Light west southwest wind becoming west 5 to 9 mph in the morning.

    High: 75 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Patchy fog after midnight.  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 3am.  Otherwise, partly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

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

    High: 75 °F

    Areas Fog
    then Sunny

  • Saturday Night

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

    Low: 55 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy fog before 4am, then patchy fog after 5am. Otherwise, mostly cloudy, with a low around 56. West wind around 8 mph.
Wednesday
Patchy fog between 7am and 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 72. West southwest wind 6 to 10 mph, with gusts as high as 18 mph.
Wednesday Night
Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 55. West southwest wind 5 to 9 mph.
Thursday
Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 75. Light west southwest wind becoming west 5 to 9 mph in the morning.
Thursday Night
Patchy fog after midnight. 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 3am. Otherwise, partly cloudy, with a low around 54.
Saturday
Areas of 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 78.
Sunday Night
Partly cloudy, with a low around 55.
Monday
Patchy fog. Otherwise, mostly sunny, with a high near 73.
Monday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 55.
Tuesday
Patchy fog. Otherwise, mostly sunny, with a high near 73.
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ABOUT THIS FORECAST

 
Point Forecast:
Castro Valley CA
 37.72°N 122.05°W (Elev. 397 ft)
1:26 pm PDT Jul 15, 2025
12am PDT Jul 16, 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