Great Falls to Porto time converter

Porto is 7 hours ahead of Great Falls. When it is 9:00 AM in Great Falls, it is 4:00 PM in Porto.

Great Falls MDT

Tuesday, October 20, 2026

Porto WEST

Tuesday, October 20, 2026

Great Falls
Montana, United States
Tue, Oct 20
MDTUTC-6
Porto
Portugal
Tue, Oct 20
WESTUTC+1+7h
Finding your time zone…
Shared working hours (9:00–18:00)

Great Falls to Porto conversion table

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

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

Best time to call or meet

Both sides are at work from 9:00 AM – 11:00 AM in Great Falls (4:00 PM – 6:00 PM in Porto).

Daylight saving time and the difference

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

  • Oct 20, 2026 – Oct 24, 2026: +7h
  • Oct 24, 2026 – Nov 1, 2026: +6h
  • Nov 1, 2026 – Mar 14, 2027: +7h
  • Mar 14, 2027 – Mar 27, 2027: +6h
  • Mar 27, 2027 – Oct 20, 2027: +7h

Distance

Great Falls and Porto are 7,570 km (4,704 miles) apart in a straight line.

More conversions

Porto to Great FallsGreat Falls to New YorkGreat Falls to LondonGreat Falls to Los AngelesGreat Falls to ChicagoGreat Falls to TorontoGreat Falls to São PauloGreat Falls to ParisGreat Falls to BerlinGreat Falls to MoscowGreat Falls to DubaiGreat Falls to New DelhiGreat Falls 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 Great Falls and Porto?

Porto is 7 hours ahead of Great Falls.

What time is it in Porto when it is 9 AM in Great Falls?

When it is 9:00 AM in Great Falls, it is 4:00 PM in Porto.

When is the best time to call Porto from Great Falls?

Both sides are at work from 9:00 AM – 11:00 AM in Great Falls (4:00 PM – 6:00 PM in Porto).

Does the time difference between Great Falls 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.