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

Hayward, Hayward Air Terminal (KHWD)

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

Mist

45°F

7°C

Humidity 93%
Wind Speed NE 10 MPH
Barometer 30.31 in (1026.41 mb)
Dewpoint 43°F (6°C)
Visibility 4.00 mi
Wind Chill40°F (4°C)
Last update 07 Dec 10:20 PM PST
Extended Forecast for

Castro Valley CA

  • Tonight

    Tonight: Patchy fog before 11pm, then patchy fog after 1am. Otherwise, mostly clear, with a low around 42. Calm wind.

    Low: 42 °F

    Patchy Fog

  • Monday

    Monday: Areas of dense fog before 9am. Otherwise, sunny, with a high near 59. Calm wind becoming north northwest around 5 mph in the afternoon.

    High: 59 °F

    Areas Dense
    Fog then
    Sunny

  • Monday Night

    Monday Night: Patchy fog after 2am. Otherwise, mostly clear, with a low around 44. Calm wind.

    Low: 44 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Areas of fog before 9am. Otherwise, sunny, with a high near 62. Calm wind becoming north northwest around 5 mph in the afternoon.

    High: 62 °F

    Areas Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 45. Calm wind.

    Low: 45 °F

    Mostly Clear

  • Wednesday

    Wednesday: Patchy fog before 9am. Otherwise, sunny, with a high near 65.

    High: 65 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 5am. Otherwise, mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear
    then Patchy
    Fog

  • Thursday

    Thursday: Patchy fog before 9am. Otherwise, sunny, with a high near 66.

    High: 66 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog before 11pm, then patchy fog after 1am. Otherwise, mostly clear, with a low around 42. Calm wind.
Monday
Areas of dense fog before 9am. Otherwise, sunny, with a high near 59. Calm wind becoming north northwest around 5 mph in the afternoon.
Monday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 44. Calm wind.
Tuesday
Areas of fog before 9am. Otherwise, sunny, with a high near 62. Calm wind becoming north northwest around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 45. Calm wind.
Wednesday
Patchy fog before 9am. Otherwise, sunny, with a high near 65.
Wednesday Night
Patchy fog after 5am. Otherwise, mostly clear, with a low around 46.
Thursday
Patchy fog before 9am. Otherwise, sunny, with a high near 66.
Thursday Night
Mostly clear, with a low around 45.
Friday
Patchy fog before 9am. Otherwise, sunny, with a high near 64.
Friday Night
Patchy fog. Otherwise, mostly clear, with a low around 44.
Saturday
Patchy fog. Otherwise, sunny, with a high near 64.
Saturday Night
Patchy fog. Otherwise, partly cloudy, with a low around 45.
Sunday
Patchy fog. Otherwise, mostly sunny, with a high near 63.
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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:
8:31 pm PST Dec 7, 2025
Forecast Valid:
10pm PST Dec 7, 2025-6pm PST Dec 14, 2025
 
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