Coastal and Marine Impacts from Imelda and Humberto as Both Track Away from the Southeast U.S.

Swells and high surf from both Imelda and Humberto are expected to bring dangerous marine and rip current conditions to the east coast of Florida and Georgia today, spreading north along much of the east coast of the U.S. this week. Heavy rainfall north and west of Imelda falling across coastal Florida and Georgia into the Carolinas could cause isolated flash and urban flooding through Tuesday. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Clear

73°F

23°C

Humidity 53%
Wind Speed WSW 6 MPH
Barometer 29.95 in (1014.22 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 29 Sep 03:00 PM PDT
Extended Forecast for

Castro Valley CA

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 72. West southwest wind around 9 mph.

    High: 72 °F

    Partly Sunny

  • Tonight

    Tonight: A 30 percent chance of rain.  Mostly cloudy, with a low around 61. West southwest wind around 6 mph becoming calm  in the evening.  New precipitation amounts of less than a tenth of an inch possible.

    Low: 61 °F

    Chance Rain

  • Tuesday

    Tuesday: A 20 percent chance of rain before 11am.  Mostly cloudy, then gradually becoming sunny, with a high near 74. Light south wind becoming southwest 5 to 9 mph in the morning.

    High: 74 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain after 11pm.  Mostly cloudy, with a low around 60. West wind around 5 mph becoming calm  in the evening.

    Low: 60 °F

    Slight Chance
    Rain

  • Wednesday

    Wednesday: A 50 percent chance of rain.  Mostly cloudy, with a high near 69. Calm wind becoming southwest 5 to 7 mph in the morning.  New precipitation amounts of less than a tenth of an inch possible.

    High: 69 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain before 11pm.  Patchy fog after 5am.  Otherwise, mostly cloudy, with a low around 58. New precipitation amounts of less than a tenth of an inch possible.

    Low: 58 °F

    Slight Chance
    Rain then
    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 8am.  Otherwise, partly sunny, with a high near 71.

    High: 71 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Friday

    Friday: Patchy fog before 8am.  Otherwise, sunny, with a high near 74.

    High: 74 °F

    Patchy Fog
    then Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 72. West southwest wind around 9 mph.
Tonight
A 30 percent chance of rain. Mostly cloudy, with a low around 61. West southwest wind around 6 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
A 20 percent chance of rain before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 74. Light south wind becoming southwest 5 to 9 mph in the morning.
Tuesday Night
A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 60. West wind around 5 mph becoming calm in the evening.
Wednesday
A 50 percent chance of rain. Mostly cloudy, with a high near 69. Calm wind becoming southwest 5 to 7 mph in the morning. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A 20 percent chance of rain before 11pm. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 58. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Patchy fog before 8am. Otherwise, partly sunny, with a high near 71.
Thursday Night
Partly cloudy, with a low around 54.
Friday
Patchy fog before 8am. Otherwise, sunny, with a high near 74.
Friday Night
Mostly clear, with a low around 54.
Saturday
Sunny, with a high near 77.
Saturday Night
Mostly clear, with a low around 55.
Sunday
Sunny, with a high near 76.
Sunday Night
Partly cloudy, with a low around 55.
Monday
Mostly sunny, with a high near 73.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Castro Valley CA
 37.72°N 122.05°W (Elev. 397 ft)
1:26 pm PDT Sep 29, 2025
3pm PDT Sep 29, 2025-6pm PDT Oct 6, 2025
 
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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