Porto to Waltham time converter

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

Porto WEST

Tuesday, October 20, 2026

Waltham EDT

Tuesday, October 20, 2026

Porto
Portugal
Tue, Oct 20
WESTUTC+1
Waltham
Massachusetts, United States
Tue, Oct 20
EDTUTC-4-5h
Finding your time zone…
Shared working hours (9:00–18:00)

Porto to Waltham conversion table

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

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

Best time to call or meet

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

Daylight saving time and the difference

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

  • Oct 20, 2026 – Oct 25, 2026: -5h
  • Oct 25, 2026 – Nov 1, 2026: -4h
  • Nov 1, 2026 – Mar 14, 2027: -5h
  • Mar 14, 2027 – Mar 28, 2027: -4h
  • Mar 28, 2027 – Oct 20, 2027: -5h

Distance

Porto and Waltham are 5,074 km (3,153 miles) apart in a straight line.

More conversions

Waltham 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 WalthamLondon to WalthamLos Angeles to WalthamChicago to WalthamToronto to WalthamSão Paulo to WalthamParis to WalthamBerlin to WalthamMoscow to WalthamDubai to WalthamNew Delhi to WalthamBangkok to Waltham

Questions and answers

What is the time difference between Porto and Waltham?

Waltham is 5 hours behind Porto.

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

When it is 9:00 AM in Porto, it is 4:00 AM in Waltham.

When is the best time to call Waltham from Porto?

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

Does the time difference between Porto and Waltham change?

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