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

Tropical Moisture Brings Heavy Rain to Southwest; Strong Coastal Low to Impact the East Coast

Deep tropical moisture surging into the Southwest U.S. will lead to widespread showers and thunderstorms capable of producing flash flooding the next several days. A strong coastal low will develop late Friday and is expected to bring flooding, high surf, dangerous rip currents, gusty winds and heavy rain to much of the U.S. East Coast through early next week. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Clear

61°F

16°C

Humidity 83%
Wind Speed W 4 MPH
Barometer 29.94 in (1013.89 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 09 Oct 10:54 PM PDT
Extended Forecast for

2 Miles SW Castro Valley CA

  • Tonight

    Tonight: Partly cloudy, with a low around 57. Light south southwest wind.

    Low: 57 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 72. Calm wind becoming west 5 to 9 mph in the afternoon.

    High: 72 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 56. West wind 3 to 6 mph.

    Low: 56 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, then gradually becoming sunny, with a high near 69. Light west wind increasing to 5 to 10 mph in the morning.

    High: 69 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 53. West wind 5 to 10 mph becoming light in the evening.

    Low: 53 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

  • Sunday Night

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

    Low: 55 °F

    Partly Cloudy

  • Columbus Day

    Columbus Day: A chance of rain, mainly after 11am. Mostly cloudy, with a high near 65.

    High: 65 °F

    Chance Rain

  • Monday Night

    Monday Night: Rain likely. Cloudy, with a low around 55.

    Low: 55 °F

    Rain Likely

Detailed Forecast

Tonight
Partly cloudy, with a low around 57. Light south southwest wind.
Friday
Sunny, with a high near 72. Calm wind becoming west 5 to 9 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 56. West wind 3 to 6 mph.
Saturday
Partly sunny, then gradually becoming sunny, with a high near 69. Light west wind increasing to 5 to 10 mph in the morning.
Saturday Night
Mostly clear, with a low around 53. West wind 5 to 10 mph becoming light in the evening.
Sunday
Sunny, with a high near 71.
Sunday Night
Partly cloudy, with a low around 55.
Columbus Day
A chance of rain, mainly after 11am. Mostly cloudy, with a high near 65.
Monday Night
Rain likely. Cloudy, with a low around 55.
Tuesday
Rain likely. Mostly cloudy, with a high near 64.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 54.
Wednesday
A chance of rain. Partly sunny, with a high near 66.
Wednesday Night
A slight chance of rain. Partly cloudy, with a low around 53.
Thursday
A slight chance of rain. Mostly sunny, with a high near 68.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Castro Valley CA
 37.69°N 122.07°W (Elev. 197 ft)
Last Update:
2:27 pm PDT Oct 9, 2025
Forecast Valid:
11pm PDT Oct 9, 2025-6pm PDT Oct 16, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation