National Weather Service Forecast for: Castro Valley, CAIssued by: National Weather Service San Francisco Bay Area/Monterey, CA |
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| Updated: Wed, 24-Jun-2026 1:26pm PDT | ||||||||||||||||||||||||||||||||||||||||
| Castro Valley/Hayward | ||||||||||||||||||||||||||||||||||||||||
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| Tonight |
Partly cloudy, with a low around 56. West wind 5 to 9 mph. |
| Thursday |
Mostly sunny. High near 75, with temperatures falling to around 71 in the afternoon. West southwest wind 5 to 12 mph, with gusts as high as 20 mph. |
| Thursday Night |
Mostly cloudy, with a low around 56. West southwest wind around 12 mph, with gusts as high as 22 mph. |
| Friday |
Mostly sunny, with a high near 70. West southwest wind around 14 mph, with gusts as high as 23 mph. |
| Friday Night |
Mostly cloudy, with a low around 57. West southwest wind 13 to 16 mph, with gusts as high as 28 mph. |
| Saturday |
Mostly sunny, with a high near 68. |
| Saturday Night |
Mostly clear, with a low around 53. |
| Sunday |
Sunny, with a high near 74. |
| Sunday Night |
Mostly clear, with a low around 55. |
| Monday |
Sunny, with a high near 78. |
| Monday Night |
Partly cloudy, with a low around 55. |
| Tuesday |
Mostly sunny, with a high near 75. |
| Tuesday Night |
Partly cloudy, with a low around 56. |
| Wednesday |
Mostly sunny, with a high near 74. |
Forecast from NOAA-NWS for Castro Valley, CA.
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