Porto, also known as Oporto, is the second largest city in Portugal and one of the major urban areas in the Iberian Peninsula.
| Sunrise: | 07:03 |
| Sunset: | 17:33 |
| Transit: | 12:18 |
| Civil twilight | begin 06:35 | end 18:01 |
| Nautical twilight | begin 06:03 | end 18:33 |
| Astronomical twilight | begin 05:31 | end 19:06 |
| Day | Sunrise | Sunset | |
| Fri | (31 Oct 2025) | 07:05 | 17:31 |
| Sat | (1 Nov 2025) | 07:06 | 17:30 |
| Sun | (2 Nov 2025) | 07:07 | 17:29 |
| Mon | (3 Nov 2025) | 07:08 | 17:28 |
| Tue | (4 Nov 2025) | 07:09 | 17:27 |
| Wed | (5 Nov 2025) | 07:11 | 17:25 |
| Thu | (6 Nov 2025) | 07:12 | 17:24 |
| Latitude: | 41°8' North |
| Longitude: | 8°36' West |
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Greenwich Mean Time (GMT) is originally referring to mean solar time at the Royal Observatory in Greenwich, London. GMT and Coordinated Universal Time (UTC) can be seen equivalent when fractions of a second are not important. |