Super Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather Threat from the Southern Plains to the Great Lakes

Super Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, thunderstorms, and coastal impacts to the Marianas Islands into Wednesday. Typhoon conditions are likely over the Northern Mariana Islands. Severe thunderstorms and heavy rain are expected from the Southern Plains to the Great Lakes through Tuesday. Heavy snow is expected in the Pacific Northwest. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Clear

57°F

14°C

Humidity 67%
Wind Speed W 11 MPH
Barometer 30.1 in (1019.3 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 13 Apr 07:35 PM PDT
Extended Forecast for

Castro Valley CA

  • Tonight

    Tonight: Increasing clouds, with a low around 48. South southwest wind 5 to 8 mph.

    Low: 48 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, then gradually becoming sunny, with a high near 64. Light southwest wind becoming west 5 to 10 mph in the morning.

    High: 64 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 48. West southwest wind 6 to 9 mph.

    Low: 48 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 66. West wind 5 to 11 mph, with gusts as high as 20 mph.

    High: 66 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 49. West wind 6 to 11 mph, with gusts as high as 20 mph.

    Low: 49 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 47.

    Low: 47 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 48. South southwest wind 5 to 8 mph.
Tuesday
Partly sunny, then gradually becoming sunny, with a high near 64. Light southwest wind becoming west 5 to 10 mph in the morning.
Tuesday Night
Partly cloudy, with a low around 48. West southwest wind 6 to 9 mph.
Wednesday
Partly sunny, with a high near 66. West wind 5 to 11 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 49. West wind 6 to 11 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 69.
Thursday Night
Clear, with a low around 47.
Friday
Sunny, with a high near 73.
Friday Night
Partly cloudy, with a low around 48.
Saturday
Mostly sunny, with a high near 75.
Saturday Night
Mostly cloudy, with a low around 50.
Sunday
A slight chance of showers. Partly sunny, with a high near 67.
Sunday Night
A slight chance of showers. Mostly cloudy, with a low around 49.
Monday
A slight chance of showers. Mostly sunny, with a high near 67.
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ABOUT THIS FORECAST

 
Point Forecast:
Castro Valley CA
 37.71°N 122.08°W (Elev. 397 ft)
1:26 pm PDT Apr 13, 2026
7pm PDT Apr 13, 2026-6pm PDT Apr 20, 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