Costa Mesa to Honolulu time converter

Honolulu is 3 hours behind Costa Mesa. When it is 9:00 AM in Costa Mesa, it is 6:00 AM in Honolulu.

Costa Mesa PDT

Monday, October 19, 2026

Honolulu HST

Monday, October 19, 2026

Costa Mesa
California, United States
Mon, Oct 19
PDTUTC-7
Honolulu
Hawaii, United States
Mon, Oct 19
HSTUTC-10-3h
Finding your time zone…
Shared working hours (9:00–18:00)

Costa Mesa to Honolulu conversion table

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

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

Best time to call or meet

Both sides are at work from 12:00 PM – 6:00 PM in Costa Mesa (9:00 AM – 3:00 PM in Honolulu).

Daylight saving time and the difference

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

  • Oct 19, 2026 – Nov 1, 2026: -3h
  • Nov 1, 2026 – Mar 14, 2027: -2h
  • Mar 14, 2027 – Oct 19, 2027: -3h

Distance

Costa Mesa and Honolulu are 4,142 km (2,574 miles) apart in a straight line.

More conversions

Honolulu 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 HonoluluLondon to HonoluluLos Angeles to HonoluluChicago to HonoluluToronto to HonoluluSão Paulo to HonoluluParis to HonoluluBerlin to HonoluluMoscow to HonoluluDubai to HonoluluNew Delhi to HonoluluBangkok to Honolulu

Questions and answers

What is the time difference between Costa Mesa and Honolulu?

Honolulu is 3 hours behind Costa Mesa.

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

When it is 9:00 AM in Costa Mesa, it is 6:00 AM in Honolulu.

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

Both sides are at work from 12:00 PM – 6:00 PM in Costa Mesa (9:00 AM – 3:00 PM in Honolulu).

Does the time difference between Costa Mesa and Honolulu change?

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