What time is it in Castro Valley, California?

Castro Valley is currently on daylight saving time. The next change is Sunday, November 1, 2026, when 2:00 am becomes 1:00 am local time.

Castro Valley sits at 37.71°N, 122.06°W. For sunrise and sunset there — which do depend on exactly where it is, unlike the clock — see sunrise and sunset in Castro Valley.

The clock says the same thing everywhere in Pacific Daylight Time, but the sun does not. Over Castro Valley it is highest at 12:59 pm today — 59 minutes after clock noon.

At 122.1°W, Castro Valley sits well toward the western edge of its zone, which is why the sun stays up later here than the clock suggests. Daylight saving adds another hour on top until the clocks change.

Today runs 12 hours 2 minutes in Castro Valley, and the day is getting shorter by 2 minutes a day. Across the year it swings 5 hours 13 minutes, from 14 hours 46 minutes at the June solstice down to 9 hours 33 minutes in December.

At 37.7°N that puts Castro Valley between Kailua at 2 hours 22 minutes and Fairbanks at 18 hours 9 minutes.