Sinlaku Continues to Impact the Marianas; Severe Weather from the Central US to the Northeast; Late-Season Snow in the Northwest

Sinlaku continues to bring destructive winds, widespread heavy rain/flooding, and storm surge to the Marianas. Showers and severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley and to the Central/Southern Plains through Thursday. A front will produce late-season snowfall over the Cascades and Northern Rockies and coastal rain over the Northwest Coast through Thursday. 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 67%
Wind Speed WSW 11 MPH
Barometer 30.13 in (1020.32 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 15 Apr 10:20 AM PDT
Extended Forecast for

3 Miles WNW Castro Valley CA

  • Today

    Today: Mostly sunny, with a high near 66. West wind 7 to 11 mph, with gusts as high as 21 mph.

    High: 66 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 47. West wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 47 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Sunny, with a high near 70. North wind 6 to 11 mph, with gusts as high as 21 mph.

    High: 70 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 48. North wind 7 to 9 mph.

    Low: 48 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 73. North wind 5 to 7 mph.

    High: 73 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 51.

    Low: 51 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of rain, mainly after 11am.  Partly sunny, with a high near 70.

    High: 70 °F

    Chance Rain

Detailed Forecast

Today
Mostly sunny, with a high near 66. West wind 7 to 11 mph, with gusts as high as 21 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 47. West wind 6 to 10 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 70. North wind 6 to 11 mph, with gusts as high as 21 mph.
Thursday Night
Clear, with a low around 48. North wind 7 to 9 mph.
Friday
Sunny, with a high near 73. North wind 5 to 7 mph.
Friday Night
Partly cloudy, with a low around 47.
Saturday
Mostly sunny, with a high near 74.
Saturday Night
Mostly cloudy, with a low around 51.
Sunday
A chance of rain, mainly after 11am. Partly sunny, with a high near 70.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 51.
Monday
A chance of rain. Partly sunny, with a high near 67.
Monday Night
A chance of rain. Mostly cloudy, with a low around 50.
Tuesday
A chance of rain. Partly sunny, with a high near 67.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Castro Valley CA
 37.73°N 122.11°W (Elev. 397 ft)
1:56 am PDT Apr 15, 2026
10am PDT Apr 15, 2026-6pm PDT Apr 21, 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