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

Rain Providing Some Relief to Drought-Stricken Southern U.S.

A storm tracking across the southern U.S. will continue to bring areas of heavy thunderstorms with risks for severe weather and excessive rainfall from Texas to Florida through this weekend. While much of this rainfall will be beneficial to the drought, excessive rainfall may bring areas of flash and urban flooding. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Clear

62°F

17°C

Humidity 72%
Wind Speed WNW 13 MPH
Barometer 29.91 in (1012.87 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 01 May 05:54 PM PDT
Extended Forecast for

Castro Valley CA

  • Tonight

    Tonight: Increasing clouds, with a low around 53. Southwest wind 6 to 8 mph.

    Low: 53 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly cloudy, with a high near 67. West wind 6 to 11 mph, with gusts as high as 18 mph.

    High: 67 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 53. West southwest wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 53 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 67. West southwest wind 6 to 10 mph.

    High: 67 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 52. West wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 52 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 67.

    High: 67 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 52.

    Low: 52 °F

    Slight Chance
    Rain

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 67.

    High: 67 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 53. Southwest wind 6 to 8 mph.
Saturday
Mostly cloudy, with a high near 67. West wind 6 to 11 mph, with gusts as high as 18 mph.
Saturday Night
Mostly cloudy, with a low around 53. West southwest wind 6 to 10 mph, with gusts as high as 18 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 67. West southwest wind 6 to 10 mph.
Sunday Night
Partly cloudy, with a low around 52. West wind 6 to 10 mph, with gusts as high as 18 mph.
Monday
Partly sunny, with a high near 67.
Monday Night
A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 52.
Tuesday
Mostly cloudy, with a high near 67.
Tuesday Night
Mostly cloudy, with a low around 54.
Wednesday
Mostly sunny, with a high near 73.
Wednesday Night
Mostly clear, with a low around 54.
Thursday
Mostly sunny, with a high near 76.
Thursday Night
Partly cloudy, with a low around 54.
Friday
Mostly sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castro Valley CA
 37.71°N 122.08°W (Elev. 397 ft)
Last Update:
1:26 pm PDT May 1, 2026
Forecast Valid:
6pm PDT May 1, 2026-6pm PDT May 8, 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