Istanbul to Costa Mesa time converter

Costa Mesa is 10 hours behind Istanbul. When it is 9:00 AM in Istanbul, it is 11:00 PM (Tue, Oct 20) in Costa Mesa.

Istanbul TRT

Wednesday, October 21, 2026

Costa Mesa PDT

Tuesday, October 20, 2026

Istanbul
Turkey
Wed, Oct 21
TRTUTC+3
Costa Mesa
California, United States
Tue, Oct 20
PDTUTC-7-10h
Finding your time zone…
Shared working hours (9:00–18:00)

Istanbul to Costa Mesa conversion table

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

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

Best time to call or meet

Working hours don't overlap fully. The closest fit is 5:00 PM – 6:00 PM in Istanbul (7:00 AM – 8:00 AM in Costa Mesa): working hours on one side, early or late on the other.

Daylight saving time and the difference

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

  • Oct 21, 2026 – Nov 1, 2026: -10h
  • Nov 1, 2026 – Mar 14, 2027: -11h
  • Mar 14, 2027 – Oct 21, 2027: -10h

Distance

Istanbul and Costa Mesa are 11,047 km (6,864 miles) apart in a straight line.

More conversions

Costa Mesa to IstanbulIstanbul to New YorkIstanbul to LondonIstanbul to Los AngelesIstanbul to ChicagoIstanbul to TorontoIstanbul to São PauloIstanbul to ParisIstanbul to BerlinIstanbul to MoscowIstanbul to DubaiIstanbul to New DelhiIstanbul 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 Istanbul and Costa Mesa?

Costa Mesa is 10 hours behind Istanbul.

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

When it is 9:00 AM in Istanbul, it is 11:00 PM (Tue, Oct 20) in Costa Mesa.

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

Working hours don't overlap fully. The closest fit is 5:00 PM – 6:00 PM in Istanbul (7:00 AM – 8:00 AM in Costa Mesa): working hours on one side, early or late on the other.

Does the time difference between Istanbul 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.