San Mateo to Sydney time converter

Sydney is 18 hours ahead of San Mateo. When it is 9:00 AM in San Mateo, it is 3:00 AM (Thu, Oct 22) in Sydney.

San Mateo PDT

Wednesday, October 21, 2026

Sydney AEDT

Thursday, October 22, 2026

San Mateo
California, United States
Wed, Oct 21
PDTUTC-7
Sydney
New South Wales, Australia
Thu, Oct 22
AEDTUTC+11+18h
Finding your time zone…
Shared working hours (9:00–18:00)

San Mateo to Sydney conversion table

Every hour of today in San Mateo and the matching time in Sydney. Light rows are typical working hours (9:00–18:00).

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

Best time to call or meet

Both sides are at work from 3:00 PM – 6:00 PM in San Mateo (9:00 AM – 12:00 PM in Sydney).

Daylight saving time and the difference

The difference changes during the year because San Mateo and Sydney switch clocks on different dates:

  • Oct 21, 2026 – Nov 1, 2026: +18h
  • Nov 1, 2026 – Mar 14, 2027: +19h
  • Mar 14, 2027 – Apr 3, 2027: +18h
  • Apr 3, 2027 – Oct 2, 2027: +17h
  • Oct 2, 2027 – Oct 21, 2027: +18h

Distance

San Mateo and Sydney are 11,943 km (7,421 miles) apart in a straight line.

More conversions

Sydney to San MateoSan Mateo to New YorkSan Mateo to LondonSan Mateo to Los AngelesSan Mateo to ChicagoSan Mateo to TorontoSan Mateo to São PauloSan Mateo to ParisSan Mateo to BerlinSan Mateo to MoscowSan Mateo to DubaiSan Mateo to New DelhiSan Mateo to Bangkok
New York to SydneyLondon to SydneyLos Angeles to SydneyChicago to SydneyToronto to SydneySão Paulo to SydneyParis to SydneyBerlin to SydneyMoscow to SydneyDubai to SydneyNew Delhi to SydneyBangkok to Sydney

Questions and answers

What is the time difference between San Mateo and Sydney?

Sydney is 18 hours ahead of San Mateo.

What time is it in Sydney when it is 9 AM in San Mateo?

When it is 9:00 AM in San Mateo, it is 3:00 AM (Thu, Oct 22) in Sydney.

When is the best time to call Sydney from San Mateo?

Both sides are at work from 3:00 PM – 6:00 PM in San Mateo (9:00 AM – 12:00 PM in Sydney).

Does the time difference between San Mateo and Sydney change?

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