Heavy Rainfall and Flooding in the Mid-Atlantic; Heat and Wildfire Concerns in the West

Slow moving showers and thunderstorms may result in flash flooding for portions of the mid-Atlantic region through tonight. Meanwhile, excessive heat will continue to build across the West through Tuesday. Heat Advisories and Extreme Heat Warnings are in effect. Fire Weather concerns continue for the West with dry and breezy conditions. Watching the tropics across the Southeast. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Overcast

59°F

15°C

Humidity 87%
Wind Speed NNW 4 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 15 Jul 03:30 AM PDT
Extended Forecast for

Castro Valley CA

  • Overnight

    Overnight: A chance of drizzle, mainly before 5am.  Mostly cloudy, with a low around 56. West wind around 5 mph.

    Low: 56 °F

    Chance
    Drizzle

  • Tuesday

    Tuesday: Cloudy through mid morning, then gradual clearing, with a high near 76. West wind 5 to 10 mph.

    High: 76 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 57. West wind 6 to 10 mph.

    Low: 57 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Cloudy through mid morning, then gradual clearing, with a high near 73. West southwest wind 5 to 10 mph.

    High: 73 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 57. West southwest wind 5 to 10 mph.

    Low: 57 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

Detailed Forecast

Overnight
A chance of drizzle, mainly before 5am. Mostly cloudy, with a low around 56. West wind around 5 mph.
Tuesday
Cloudy through mid morning, then gradual clearing, with a high near 76. West wind 5 to 10 mph.
Tuesday Night
Increasing clouds, with a low around 57. West wind 6 to 10 mph.
Wednesday
Cloudy through mid morning, then gradual clearing, with a high near 73. West southwest wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 57. West southwest wind 5 to 10 mph.
Thursday
Mostly sunny, with a high near 75.
Thursday Night
Partly cloudy, with a low around 57.
Friday
Mostly sunny, with a high near 74.
Friday Night
Partly cloudy, with a low around 56.
Saturday
Mostly sunny, with a high near 74.
Saturday Night
Partly cloudy, with a low around 56.
Sunday
Mostly sunny, with a high near 76.
Sunday Night
Partly cloudy, with a low around 57.
Monday
Partly sunny, with a high near 72.
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ABOUT THIS FORECAST

 
Point Forecast:
Castro Valley CA
 37.69°N 122.07°W (Elev. 197 ft)
3:02 am PDT Jul 15, 2025
3am PDT Jul 15, 2025-6pm PDT Jul 21, 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