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

Hazardous Weather Conditions

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Overcast

59°F

15°C

Humidity 89%
Wind Speed E 5 MPH
Barometer 29.8 in (1009.14 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 09 Oct 07:54 AM PDT
Extended Forecast for

Castro Valley CA

Coastal Flood Advisory October 9, 09:00am until October 13, 03:00pm
Click here for hazard details and duration
Coastal Flood Advisory

  • Today

    Today: Partly sunny, then gradually becoming sunny, with a high near 77. Calm wind becoming west 5 to 9 mph in the morning.

    High: 77 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 56. West southwest wind 7 to 11 mph, with gusts as high as 24 mph.

    Low: 56 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, with a steady temperature around 59. Southwest wind around 13 mph, with gusts as high as 24 mph.

    High: 59 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 52. Southwest wind 13 to 16 mph, with gusts as high as 29 mph.

    Low: 52 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 64. Southwest wind 5 to 9 mph, with gusts as high as 18 mph.

    High: 64 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of rain after 11pm. Partly cloudy, with a low around 50.

    Low: 50 °F

    Slight Chance
    Rain

  • Columbus Day

    Columbus Day: A 30 percent chance of rain, mainly before 11am. Mostly sunny, with a high near 66.

    High: 66 °F

    Chance Rain

  • Monday Night

    Monday Night: Mostly clear, with a low around 50.

    Low: 50 °F

    Mostly Clear

  • Tuesday

    Tuesday: Patchy fog before 9am. Otherwise, sunny, with a high near 68.

    High: 68 °F

    Patchy Fog
    then Sunny

Detailed Forecast

Today
Partly sunny, then gradually becoming sunny, with a high near 77. Calm wind becoming west 5 to 9 mph in the morning.
Tonight
Increasing clouds, with a low around 56. West southwest wind 7 to 11 mph, with gusts as high as 24 mph.
Saturday
Partly sunny, with a steady temperature around 59. Southwest wind around 13 mph, with gusts as high as 24 mph.
Saturday Night
Partly cloudy, with a low around 52. Southwest wind 13 to 16 mph, with gusts as high as 29 mph.
Sunday
Mostly sunny, with a high near 64. Southwest wind 5 to 9 mph, with gusts as high as 18 mph.
Sunday Night
A 20 percent chance of rain after 11pm. Partly cloudy, with a low around 50.
Columbus Day
A 30 percent chance of rain, mainly before 11am. Mostly sunny, with a high near 66.
Monday Night
Mostly clear, with a low around 50.
Tuesday
Patchy fog before 9am. Otherwise, sunny, with a high near 68.
Tuesday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 51.
Wednesday
Patchy fog. Otherwise, sunny, with a high near 73.
Wednesday Night
Mostly clear, with a low around 54.
Thursday
Sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castro Valley CA
 37.72°N 122.05°W (Elev. 397 ft)
Last Update:
5:38 am PDT Oct 9, 2026
Forecast Valid:
8am PDT Oct 9, 2026-6pm PDT Oct 15, 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