Porto to Simi Valley time converter

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

Porto WEST

Tuesday, October 20, 2026

Simi Valley PDT

Monday, October 19, 2026

Porto
Portugal
Tue, Oct 20
WESTUTC+1
Simi Valley
California, United States
Mon, Oct 19
PDTUTC-7-8h
Finding your time zone…
Shared working hours (9:00–18:00)

Porto to Simi Valley conversion table

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

PortoSimi Valley
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 Porto (9:00 AM – 10:00 AM in Simi Valley).

Daylight saving time and the difference

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

  • Oct 20, 2026 – Oct 25, 2026: -8h
  • Oct 25, 2026 – Nov 1, 2026: -7h
  • Nov 1, 2026 – Mar 14, 2027: -8h
  • Mar 14, 2027 – Mar 28, 2027: -7h
  • Mar 28, 2027 – Oct 20, 2027: -8h

Distance

Porto and Simi Valley are 9,010 km (5,599 miles) apart in a straight line.

More conversions

Simi Valley 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 Simi ValleyLondon to Simi ValleyLos Angeles to Simi ValleyChicago to Simi ValleyToronto to Simi ValleySão Paulo to Simi ValleyParis to Simi ValleyBerlin to Simi ValleyMoscow to Simi ValleyDubai to Simi ValleyNew Delhi to Simi ValleyBangkok to Simi Valley

Questions and answers

What is the time difference between Porto and Simi Valley?

Simi Valley is 8 hours behind Porto.

What time is it in Simi Valley when it is 9 AM in Porto?

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

When is the best time to call Simi Valley from Porto?

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

Does the time difference between Porto and Simi Valley change?

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