Porto to Santo Tomé time converter

Santo Tomé is 4 hours behind Porto. When it is 9:00 AM in Porto, it is 5:00 AM in Santo Tomé.

Porto WEST

Wednesday, October 21, 2026

Santo Tomé ART

Wednesday, October 21, 2026

Porto
Portugal
Wed, Oct 21
WESTUTC+1
Santo Tomé
Argentina
Wed, Oct 21
ARTUTC-3-4h
Finding your time zone…
Shared working hours (9:00–18:00)

Porto to Santo Tomé conversion table

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

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

Best time to call or meet

Both sides are at work from 1:00 PM – 6:00 PM in Porto (9:00 AM – 2:00 PM in Santo Tomé).

Daylight saving time and the difference

The difference changes during the year because Porto and Santo Tomé switch clocks on different dates:

  • Oct 21, 2026 – Oct 25, 2026: -4h
  • Oct 25, 2026 – Mar 28, 2027: -3h
  • Mar 28, 2027 – Oct 21, 2027: -4h

Distance

Porto and Santo Tomé are 9,703 km (6,029 miles) apart in a straight line.

More conversions

Santo Tomé 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 Santo ToméLondon to Santo ToméLos Angeles to Santo ToméChicago to Santo ToméToronto to Santo ToméSão Paulo to Santo ToméParis to Santo ToméBerlin to Santo ToméMoscow to Santo ToméDubai to Santo ToméNew Delhi to Santo ToméBangkok to Santo Tomé

Questions and answers

What is the time difference between Porto and Santo Tomé?

Santo Tomé is 4 hours behind Porto.

What time is it in Santo Tomé when it is 9 AM in Porto?

When it is 9:00 AM in Porto, it is 5:00 AM in Santo Tomé.

When is the best time to call Santo Tomé from Porto?

Both sides are at work from 1:00 PM – 6:00 PM in Porto (9:00 AM – 2:00 PM in Santo Tomé).

Does the time difference between Porto and Santo Tomé change?

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