The time difference between Porto and San Francisco is 7 hours. When it is 12:00 noon in Porto, it is 05:00 in San Francisco. Porto uses the Europe/Lisbon time zone (UTC+0), while San Francisco uses America/Los_Angeles (UTC-7).
| Detail | Porto | San Francisco |
|---|---|---|
| Time Zone ID | Europe/Lisbon | America/Los_Angeles |
| UTC Offset | UTC+0 | UTC-7 |
| Abbreviation | WET | PDT |
| DST Active | No | Yes — currently observing |
| Country | Portugal | United States |
| Region | Europe | North America |
There are 1 overlapping business hours between Porto and San Francisco (assuming 9:00–17:00 in each city). The ideal window for calls and meetings is:
Use this table to quickly convert any hour from Porto time to San Francisco time. Rows highlighted in green indicate overlapping business hours in both cities.
| Porto | San Francisco | |
|---|---|---|
| 00:00 | 17:00 (-1 day) | Night |
| 01:00 | 18:00 (-1 day) | Night |
| 02:00 | 19:00 (-1 day) | Night |
| 03:00 | 20:00 (-1 day) | Night |
| 04:00 | 21:00 (-1 day) | Night |
| 05:00 | 22:00 (-1 day) | Night |
| 06:00 | 23:00 (-1 day) | |
| 07:00 | 00:00 | |
| 08:00 | 01:00 | |
| 09:00 | 02:00 | |
| 10:00 | 03:00 | |
| 11:00 | 04:00 | |
| 12:00 | 05:00 | |
| 13:00 | 06:00 | |
| 14:00 | 07:00 | |
| 15:00 | 08:00 | |
| 16:00 | 09:00 | Overlap |
| 17:00 | 10:00 | |
| 18:00 | 11:00 | |
| 19:00 | 12:00 | |
| 20:00 | 13:00 | |
| 21:00 | 14:00 | |
| 22:00 | 15:00 | Night |
| 23:00 | 16:00 | Night |
San Francisco is currently observing daylight saving time, while Porto is on standard time. When San Francisco switches back to standard time, the difference between these two cities will shift by 1 hour.
The time difference is 7 hours. San Francisco is 7 hours behind Porto.
Yes. One of these cities observes DST while the other does not, so the difference shifts by 1 hour when DST begins or ends.
The best window is between 16:00 and 17:00 Porto time, which corresponds to 09:00–10:00 in San Francisco. Both sides fall within normal business hours.
Subtract 7 hours from Porto time to get San Francisco time. Use the hour-by-hour table above for a quick reference.
For sunrise and sunset data, visit TheSunsetTimes.com. For detailed DST schedules, see DaylightSavingTime.info.