Porto to Costa Mesa time converter

Costa Mesa is 8 hours behind Porto. When it is 9:00 AM in Porto, it is 1:00 AM in Costa Mesa.

Porto WEST

Tuesday, October 20, 2026

Costa Mesa PDT

Tuesday, October 20, 2026

Porto
Portugal
Tue, Oct 20
WESTUTC+1
Costa Mesa
California, United States
Tue, Oct 20
PDTUTC-7-8h
Finding your time zone…
Shared working hours (9:00–18:00)

Porto to Costa Mesa conversion table

Every hour of today in Porto and the matching time in Costa Mesa. Light rows are typical working hours (9:00–18:00).

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

Best time to call or meet

Both sides are at work from 5:00 PM – 6:00 PM in Porto (9:00 AM – 10:00 AM in Costa Mesa).

Daylight saving time and the difference

The difference changes during the year because Porto and Costa Mesa switch clocks on different dates:

  • Oct 20, 2026 – Oct 25, 2026: -8h
  • Oct 25, 2026 – Nov 1, 2026: -7h
  • Nov 1, 2026 – Mar 14, 2027: -8h
  • Mar 14, 2027 – Mar 28, 2027: -7h
  • Mar 28, 2027 – Oct 20, 2027: -8h

Distance

Porto and Costa Mesa are 9,002 km (5,594 miles) apart in a straight line.

More conversions

Costa Mesa to PortoPorto to New YorkPorto to LondonPorto to Los AngelesPorto to ChicagoPorto to TorontoPorto to São PauloPorto to ParisPorto to BerlinPorto to MoscowPorto to DubaiPorto to New DelhiPorto to Bangkok
New York to Costa MesaLondon to Costa MesaLos Angeles to Costa MesaChicago to Costa MesaToronto to Costa MesaSão Paulo to Costa MesaParis to Costa MesaBerlin to Costa MesaMoscow to Costa MesaDubai to Costa MesaNew Delhi to Costa MesaBangkok to Costa Mesa

Questions and answers

What is the time difference between Porto and Costa Mesa?

Costa Mesa is 8 hours behind Porto.

What time is it in Costa Mesa when it is 9 AM in Porto?

When it is 9:00 AM in Porto, it is 1:00 AM in Costa Mesa.

When is the best time to call Costa Mesa from Porto?

Both sides are at work from 5:00 PM – 6:00 PM in Porto (9:00 AM – 10:00 AM in Costa Mesa).

Does the time difference between Porto and Costa Mesa change?

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