Costa Mesa to Porto time converter

Porto is 8 hours ahead of Costa Mesa. When it is 9:00 AM in Costa Mesa, it is 5:00 PM in Porto.

Costa Mesa PDT

Tuesday, October 20, 2026

Porto WEST

Tuesday, October 20, 2026

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

Costa Mesa to Porto conversion table

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

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

Best time to call or meet

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

Daylight saving time and the difference

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

  • Oct 20, 2026 – Oct 24, 2026: +8h
  • Oct 24, 2026 – Nov 1, 2026: +7h
  • Nov 1, 2026 – Mar 14, 2027: +8h
  • Mar 14, 2027 – Mar 27, 2027: +7h
  • Mar 27, 2027 – Oct 20, 2027: +8h

Distance

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

More conversions

Porto to Costa MesaCosta Mesa to New YorkCosta Mesa to LondonCosta Mesa to Los AngelesCosta Mesa to ChicagoCosta Mesa to TorontoCosta Mesa to São PauloCosta Mesa to ParisCosta Mesa to BerlinCosta Mesa to MoscowCosta Mesa to DubaiCosta Mesa to New DelhiCosta Mesa to Bangkok
New York to PortoLondon to PortoLos Angeles to PortoChicago to PortoToronto to PortoSão Paulo to PortoParis to PortoBerlin to PortoMoscow to PortoDubai to PortoNew Delhi to PortoBangkok to Porto

Questions and answers

What is the time difference between Costa Mesa and Porto?

Porto is 8 hours ahead of Costa Mesa.

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

When it is 9:00 AM in Costa Mesa, it is 5:00 PM in Porto.

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

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

Does the time difference between Costa Mesa and Porto change?

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