Castro Valley to São Paulo time converter

São Paulo is 4 hours ahead of Castro Valley. When it is 9:00 AM in Castro Valley, it is 1:00 PM in São Paulo.

Castro Valley PDT

Wednesday, October 21, 2026

São Paulo BRT

Wednesday, October 21, 2026

Castro Valley
California, United States
Wed, Oct 21
PDTUTC-7
São Paulo
Brazil
Wed, Oct 21
BRTUTC-3+4h
Finding your time zone…
Shared working hours (9:00–18:00)

Castro Valley to São Paulo conversion table

Every hour of today in Castro Valley and the matching time in São Paulo. Light rows are typical working hours (9:00–18:00).

Castro ValleySão Paulo
12:00 AM4:00 AM
1:00 AM5:00 AM
2:00 AM6:00 AM
3:00 AM7:00 AM
4:00 AM8:00 AM
5:00 AM9:00 AM
6:00 AM10:00 AM
7:00 AM11:00 AM
8:00 AM12:00 PM
9:00 AM1:00 PM
10:00 AM2:00 PM
11:00 AM3:00 PM
12:00 PM4:00 PM
1:00 PM5:00 PM
2:00 PM6:00 PM
3:00 PM7:00 PM
4:00 PM8:00 PM
5:00 PM9:00 PM
6:00 PM10:00 PM
7:00 PM11:00 PM
8:00 PM12:00 AM+1 day
9:00 PM1:00 AM+1 day
10:00 PM2:00 AM+1 day
11:00 PM3:00 AM+1 day

Best time to call or meet

Both sides are at work from 9:00 AM – 2:00 PM in Castro Valley (1:00 PM – 6:00 PM in São Paulo).

Daylight saving time and the difference

The difference changes during the year because Castro Valley and São Paulo switch clocks on different dates:

  • Oct 21, 2026 – Nov 1, 2026: +4h
  • Nov 1, 2026 – Mar 14, 2027: +5h
  • Mar 14, 2027 – Oct 21, 2027: +4h

Distance

Castro Valley and São Paulo are 10,403 km (6,464 miles) apart in a straight line.

More conversions

São Paulo to Castro ValleyCastro Valley to New YorkCastro Valley to LondonCastro Valley to Los AngelesCastro Valley to ChicagoCastro Valley to TorontoCastro Valley to ParisCastro Valley to BerlinCastro Valley to MoscowCastro Valley to DubaiCastro Valley to New DelhiCastro Valley to BangkokCastro Valley to Singapore
New York to São PauloLondon to São PauloLos Angeles to São PauloChicago to São PauloToronto to São PauloParis to São PauloBerlin to São PauloMoscow to São PauloDubai to São PauloNew Delhi to São PauloBangkok to São PauloSingapore to São Paulo

Questions and answers

What is the time difference between Castro Valley and São Paulo?

São Paulo is 4 hours ahead of Castro Valley.

What time is it in São Paulo when it is 9 AM in Castro Valley?

When it is 9:00 AM in Castro Valley, it is 1:00 PM in São Paulo.

When is the best time to call São Paulo from Castro Valley?

Both sides are at work from 9:00 AM – 2:00 PM in Castro Valley (1:00 PM – 6:00 PM in São Paulo).

Does the time difference between Castro Valley and São Paulo change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.