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

Arctic Air for the Northeast and Mid-Atlantic; Increase Moisture for Pacific Northwest; Active Pattern for Hawaii

An arctic cold front will impact the Great Lakes, Northeast and mid-Atlantic. Snow showers and squalls will accompany this system with increasing winds and falling temperatures. Damaging wind gusts may result in tree damage and power outages. Meanwhile, moisture returns for the Pacific Northwest and Hawaii this weekend with both coverage and intensity of rainfall and higher elevation snows. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Mist

52°F

11°C

Humidity 92%
Wind Speed NW 4 MPH
Barometer 30.25 in (1024.38 mb)
Dewpoint 50°F (10°C)
Visibility 5.00 mi
Last update 06 Feb 11:37 PM PST
Extended Forecast for

Castro Valley CA

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 47. Light west wind.

    Low: 47 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog between 7am and 9am. Otherwise, mostly sunny, with a high near 65. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 65 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 47. Light south southwest wind.

    Low: 47 °F

    Partly Cloudy

  • Sunday

    Sunday: A 10 percent chance of rain after 4pm. Partly sunny, with a high near 65. Calm wind becoming west around 6 mph in the afternoon.

    High: 65 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Sunday Night

    Sunday Night: A 20 percent chance of rain before 10pm. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 50. West southwest wind around 6 mph.

    Low: 50 °F

    Slight Chance
    Rain then
    Patchy Fog

  • Monday

    Monday: Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 64.

    High: 64 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Monday Night

    Monday Night: A 20 percent chance of rain after 10pm. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Slight Chance
    Rain

  • Tuesday

    Tuesday: A chance of rain. Mostly cloudy, with a high near 58.

    High: 58 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A chance of rain. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Chance Rain

Detailed Forecast

Tonight
Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 47. Light west wind.
Saturday
Patchy fog between 7am and 9am. Otherwise, mostly sunny, with a high near 65. Calm wind becoming west 5 to 7 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 47. Light south southwest wind.
Sunday
A 10 percent chance of rain after 4pm. Partly sunny, with a high near 65. Calm wind becoming west around 6 mph in the afternoon.
Sunday Night
A 20 percent chance of rain before 10pm. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 50. West southwest wind around 6 mph.
Monday
Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 64.
Monday Night
A 20 percent chance of rain after 10pm. Mostly cloudy, with a low around 47.
Tuesday
A chance of rain. Mostly cloudy, with a high near 58.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 44.
Wednesday
A chance of rain, mainly before 10am. Mostly sunny, with a high near 60.
Wednesday Night
Mostly clear, with a low around 42.
Thursday
Sunny, with a high near 63.
Thursday Night
Mostly clear, with a low around 44.
Friday
A slight chance of rain. Mostly sunny, with a high near 61.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Castro Valley CA
 37.72°N 122.05°W (Elev. 397 ft)
Last Update:
2:55 pm PST Feb 6, 2026
Forecast Valid:
11pm PST Feb 6, 2026-6pm PST Feb 13, 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