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

Heavy Rainfall and Severe Thunderstorm Threats for the Plains and Southeast

A frontal boundary extending from the western High Plains to the Southeast will focus additional showers and thunderstorms this weekend. Some of these storms may become severe, alongside frequent lightning, and isolated instances of flash flooding. Meanwhile dry conditions will continue for the Great Basin where fire weather concerns linger. For the mid-Atlantic and Northeast, seasonable weather. 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 WNW 3 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 55°F (13°C)
Visibility 9.00 mi
Last update 03 Aug 02:20 AM PDT
Extended Forecast for

Castro Valley CA

  • Overnight

    Overnight: Mostly cloudy, with a low around 56. Southwest wind around 6 mph.

    Low: 56 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 70. West southwest wind 6 to 10 mph.

    High: 70 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 55. Southwest wind 7 to 10 mph, with gusts as high as 18 mph.

    Low: 55 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 73. West southwest wind 6 to 10 mph.

    High: 73 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 55. Southwest wind 6 to 10 mph.

    Low: 55 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Tuesday Night

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

    Low: 57 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 56. Southwest wind around 6 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 70. West southwest wind 6 to 10 mph.
Sunday Night
Partly cloudy, with a low around 55. Southwest wind 7 to 10 mph, with gusts as high as 18 mph.
Monday
Mostly sunny, with a high near 73. West southwest wind 6 to 10 mph.
Monday Night
Partly cloudy, with a low around 55. Southwest wind 6 to 10 mph.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
Partly cloudy, with a low around 57.
Wednesday
Mostly sunny, with a high near 79.
Wednesday Night
Partly cloudy, with a low around 58.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
Partly cloudy, with a low around 59.
Friday
Mostly sunny, with a high near 80.
Friday Night
Mostly cloudy, with a low around 59.
Saturday
Mostly sunny, with a high near 78.
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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 am PDT Aug 3, 2025
Forecast Valid:
2am PDT Aug 3, 2025-6pm PDT Aug 9, 2025
 
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