Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Clear

75°F

24°C

Humidity 57%
Wind Speed W 6 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 27 Aug 03:35 PM PDT
Extended Forecast for

2 Miles WNW Castro Valley CA

  • Tonight

    Tonight: A 20 percent chance of showers after 4am.  Mostly cloudy, with a low around 61. Southwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 61 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers.  Cloudy, then gradually becoming mostly sunny, with a high near 72. Light and variable wind becoming west southwest 5 to 10 mph in the morning.

    High: 72 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 58. South southwest wind 5 to 7 mph.

    Low: 58 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy through mid morning, then gradual clearing, with a high near 71. West southwest wind 6 to 10 mph.

    High: 71 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 57. Southwest wind 8 to 11 mph, with gusts as high as 18 mph.

    Low: 57 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

  • Sunday Night

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

    Low: 56 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 68.

    High: 68 °F

    Partly Sunny

  • Monday Night

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

    Low: 56 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of showers after 4am. Mostly cloudy, with a low around 61. Southwest wind 5 to 7 mph becoming calm in the evening.
Friday
A 20 percent chance of showers. Cloudy, then gradually becoming mostly sunny, with a high near 72. Light and variable wind becoming west southwest 5 to 10 mph in the morning.
Friday Night
Partly cloudy, with a low around 58. South southwest wind 5 to 7 mph.
Saturday
Mostly cloudy through mid morning, then gradual clearing, with a high near 71. West southwest wind 6 to 10 mph.
Saturday Night
Partly cloudy, with a low around 57. Southwest wind 8 to 11 mph, with gusts as high as 18 mph.
Sunday
Mostly sunny, with a high near 71.
Sunday Night
Partly cloudy, with a low around 56.
Monday
Partly sunny, with a high near 68.
Monday Night
Partly cloudy, with a low around 56.
Tuesday
A slight chance of showers after 11am. Partly sunny, with a high near 70.
Tuesday Night
Partly cloudy, with a low around 56.
Wednesday
Partly sunny, with a high near 72.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 57.
Thursday
A slight chance of showers. Partly sunny, with a high near 74.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Castro Valley CA
 37.71°N 122.11°W (Elev. 397 ft)
1:42 pm PDT Aug 27, 2026
3pm PDT Aug 27, 2026-6pm PDT Sep 3, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database