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

Flash Flooding Continuing Along the Gulf Coast; Dry Thunderstorms in the West

Excessive rainfall continues to produce life-threatening, locally catastrophic flash flooding along the central Gulf Coast. Isolated to scattered dry thunderstorms may cause lightning-ignited fires and erratic behavior due to gusty winds across parts Oregon, California, and the Great Basin into the weekend. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Partly Cloudy

70°F

21°C

Humidity 56%
Wind Speed W 12 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 19 Jun 01:20 PM PDT
Extended Forecast for

Castro Valley CA

  • Juneteenth

    Juneteenth: Sunny, with a high near 72. West wind 9 to 11 mph, with gusts as high as 18 mph.

    High: 72 °F

    Sunny

  • Tonight

    Tonight: A slight chance of drizzle after 1am. Increasing clouds, with a low around 56. West wind 8 to 13 mph becoming light west southwest after midnight. Winds could gust as high as 22 mph.

    Low: 56 °F

    Partly Cloudy
    then Slight
    Chance
    Drizzle

  • Saturday

    Saturday: A slight chance of drizzle before 9am. Cloudy through mid morning, then gradual clearing, with a high near 72. Light west southwest wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 20 mph.

    High: 72 °F

    Slight Chance
    Drizzle then
    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 54. West southwest wind 5 to 10 mph, with gusts as high as 18 mph.

    Low: 54 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly sunny, with a high near 75. West southwest wind 5 to 9 mph.

    High: 75 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Monday Night

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

    Low: 55 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

Juneteenth
Sunny, with a high near 72. West wind 9 to 11 mph, with gusts as high as 18 mph.
Tonight
A slight chance of drizzle after 1am. Increasing clouds, with a low around 56. West wind 8 to 13 mph becoming light west southwest after midnight. Winds could gust as high as 22 mph.
Saturday
A slight chance of drizzle before 9am. Cloudy through mid morning, then gradual clearing, with a high near 72. Light west southwest wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 20 mph.
Saturday Night
Increasing clouds, with a low around 54. West southwest wind 5 to 10 mph, with gusts as high as 18 mph.
Sunday
Mostly sunny, with a high near 75. West southwest wind 5 to 9 mph.
Sunday Night
Partly cloudy, with a low around 54.
Monday
Mostly sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 55.
Tuesday
Mostly sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 55.
Wednesday
Mostly sunny, with a high near 80.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castro Valley CA
 37.72°N 122.05°W (Elev. 397 ft)
Last Update:
1:26 pm PDT Jun 19, 2026
Forecast Valid:
1pm PDT Jun 19, 2026-6pm PDT Jun 25, 2026
 
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Additional Resources

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Chance of Precipitation