Showers and Storms in the East; Dangerously Hot and Dry in the West

Scattered showers and storms are expected across portions of the Central and Eastern U.S. through the end of the week. Meanwhile, dangerous heat will intensify across the Desert Southwest and Intermountain West. Hot, dry weather and increasing winds will allow elevated wildfire conditions to return to the northern Intermountain West, where air quality issues persist from ongoing fires. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Partly Cloudy

57°F

14°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 29.84 in (1010.5 mb)
Dewpoint 55°F (13°C)
Visibility 9.00 mi
Last update 09 Aug 05:15 AM PDT
Extended Forecast for

Castro Valley CA

Coastal Flood Advisory August 9, 05:42am until August 13, 02:00am
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory August 9, 05:42am until August 13, 02:00am

    NOW until 2:00am Thu

    Coastal Flood Advisory

  • Today

    High: 90 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 60. Southwest wind around 6 mph.

    Low: 60 °F

    Increasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 83. Light southwest wind becoming west 5 to 9 mph in the morning.

    High: 83 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 60. West wind 5 to 8 mph becoming calm  after midnight.

    Low: 60 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 82. Calm wind becoming west 5 to 9 mph in the afternoon.

    High: 82 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 60.

    Low: 60 °F

    Mostly Cloudy

Detailed Forecast

Today
Sunny, with a high near 90. Calm wind becoming west 5 to 8 mph in the afternoon.
Tonight
Increasing clouds, with a low around 60. Southwest wind around 6 mph.
Monday
Mostly sunny, with a high near 83. Light southwest wind becoming west 5 to 9 mph in the morning.
Monday Night
Partly cloudy, with a low around 60. West wind 5 to 8 mph becoming calm after midnight.
Tuesday
Mostly sunny, with a high near 82. Calm wind becoming west 5 to 9 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 59.
Wednesday
Mostly sunny, with a high near 82.
Wednesday Night
Mostly cloudy, with a low around 60.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
Mostly cloudy, with a low around 60.
Friday
Mostly sunny, with a high near 76.
Friday Night
Partly cloudy, with a low around 59.
Saturday
Mostly sunny, with a high near 76.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Castro Valley CA
 37.72°N 122.05°W (Elev. 397 ft)
1:46 am PDT Aug 9, 2026
5am PDT Aug 9, 2026-6pm PDT Aug 15, 2026
 
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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