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

Strong Storms and Heavy Rainfall Threats; Dangerous Heat for Southern Plains into the Southwest

Thunderstorms, some severe, will impact areas of the Plains into the Midwest today. Rainfall can be locally heavy as well from these storms with isolated instances of flash flooding. Monsoonal flow will enhance rainfall across the Four Corners into the central Rockies today. Meanwhile, summer heat continues for the southern Plains, Southwest into southern California. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Mostly Cloudy

64°F

18°C

Humidity 77%
Wind Speed W 3 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 25 Aug 10:54 AM PDT
Extended Forecast for

2 Miles NNW Castro Valley CA

  • Today

    Today: Mostly sunny, with a high near 78. West southwest wind 5 to 9 mph.

    High: 78 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 58. Southwest wind around 6 mph becoming calm in the evening.

    Low: 58 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 83. Calm wind becoming west 5 to 8 mph in the afternoon.

    High: 83 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 60. West southwest wind 5 to 7 mph becoming calm in the evening.

    Low: 60 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 80. Light and variable wind becoming west 5 to 8 mph in the afternoon.

    High: 80 °F

    Mostly Sunny

  • Thursday Night

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

    Low: 58 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 74.

    High: 74 °F

    Partly Sunny

  • Friday Night

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

    Low: 55 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 78. West southwest wind 5 to 9 mph.
Tonight
Mostly cloudy, with a low around 58. Southwest wind around 6 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 83. Calm wind becoming west 5 to 8 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 60. West southwest wind 5 to 7 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 80. Light and variable wind becoming west 5 to 8 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 58.
Friday
Partly sunny, with a high near 74.
Friday Night
Partly cloudy, with a low around 55.
Saturday
Mostly sunny, with a high near 72.
Saturday Night
Partly cloudy, with a low around 54.
Sunday
Mostly sunny, with a high near 71.
Sunday Night
Partly cloudy, with a low around 54.
Monday
Partly sunny, with a high near 68.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Castro Valley CA
 37.73°N 122.08°W (Elev. 614 ft)
Last Update:
9:23 am PDT Aug 25, 2026
Forecast Valid:
11am PDT Aug 25, 2026-6pm PDT Aug 31, 2026
 
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