Semboku to Porto time converter

Porto is 8 hours behind Semboku. When it is 9:00 AM in Semboku, it is 1:00 AM in Porto.

Semboku JST

Tuesday, October 20, 2026

Porto WEST

Monday, October 19, 2026

Semboku
Japan
Tue, Oct 20
JSTUTC+9
Porto
Portugal
Mon, Oct 19
WESTUTC+1-8h
Finding your time zone…
Shared working hours (9:00–18:00)

Semboku to Porto conversion table

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

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

Best time to call or meet

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

Daylight saving time and the difference

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

  • Oct 20, 2026 – Oct 25, 2026: -8h
  • Oct 25, 2026 – Mar 28, 2027: -9h
  • Mar 28, 2027 – Oct 20, 2027: -8h

Distance

Semboku and Porto are 10,505 km (6,528 miles) apart in a straight line.

More conversions

Porto to SembokuSemboku to New YorkSemboku to LondonSemboku to Los AngelesSemboku to ChicagoSemboku to TorontoSemboku to São PauloSemboku to ParisSemboku to BerlinSemboku to MoscowSemboku to DubaiSemboku to New DelhiSemboku 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 Semboku and Porto?

Porto is 8 hours behind Semboku.

What time is it in Porto when it is 9 AM in Semboku?

When it is 9:00 AM in Semboku, it is 1:00 AM in Porto.

When is the best time to call Porto from Semboku?

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

Does the time difference between Semboku 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.