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

Extreme Heat and Severe Thunderstorms Today

Extreme heat continues today from the central Plains to the lower Mississippi River Valley, over southeast Montana, and from southern California into the Southwest Deserts. Extreme Heat Warnings remain in effect. Severe thunderstorms capable of strong to severe wind gusts and large hail are possible across the Great Lakes into the Ohio Valley today into tonight. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Clear

70°F

21°C

Humidity 60%
Wind Speed WNW 13 MPH
Barometer 30.0 in (1015.92 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 27 Jul 05:05 PM PDT
Extended Forecast for

2 Miles SW Castro Valley CA

  • Tonight

    Tonight: Increasing clouds. Southwest wind 6 to 9 mph.

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, then gradually becoming sunny, with a high near 77. South southwest wind 6 to 10 mph.

    High: 77 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 59. South southwest wind 6 to 9 mph.

    Low: 59 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 80. Southwest wind 5 to 9 mph.

    High: 80 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 58. Southwest wind 6 to 9 mph.

    Low: 58 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds. Southwest wind 6 to 9 mph.
Tuesday
Partly sunny, then gradually becoming sunny, with a high near 77. South southwest wind 6 to 10 mph.
Tuesday Night
Increasing clouds, with a low around 59. South southwest wind 6 to 9 mph.
Wednesday
Mostly cloudy through mid morning, then gradual clearing, with a high near 80. Southwest wind 5 to 9 mph.
Wednesday Night
Mostly clear, with a low around 58. Southwest wind 6 to 9 mph.
Thursday
Sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 58.
Friday
Mostly sunny, with a high near 84.
Friday Night
Mostly clear, with a low around 59.
Saturday
Mostly sunny, with a high near 84.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Sunny, with a high near 84.
Sunday Night
Mostly clear, with a low around 59.
Monday
Sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Castro Valley CA
 37.69°N 122.07°W (Elev. 197 ft)
Last Update:
1:25 pm PDT Jul 27, 2026
Forecast Valid:
5pm PDT Jul 27, 2026-6pm PDT Aug 3, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation