Porto to Guam time converter
Guam is 9 hours ahead of Porto. When it is 9:00 AM in Porto, it is 6:00 PM in Guam.
2:16 AM in Porto, Tuesday, October 20, 2026
Porto to Guam conversion table
Every hour of today in Porto and the matching time in Guam. Light rows are typical working hours (9:00–18:00).
| Porto | Guam |
|---|---|
| 12:00 AM | 9:00 AM |
| 1:00 AM | 10:00 AM |
| 2:00 AM | 11:00 AM |
| 3:00 AM | 12:00 PM |
| 4:00 AM | 1:00 PM |
| 5:00 AM | 2:00 PM |
| 6:00 AM | 3:00 PM |
| 7:00 AM | 4:00 PM |
| 8:00 AM | 5:00 PM |
| 9:00 AM | 6:00 PM |
| 10:00 AM | 7:00 PM |
| 11:00 AM | 8:00 PM |
| 12:00 PM | 9:00 PM |
| 1:00 PM | 10:00 PM |
| 2:00 PM | 11:00 PM |
| 3:00 PM | 12:00 AM+1 day |
| 4:00 PM | 1:00 AM+1 day |
| 5:00 PM | 2:00 AM+1 day |
| 6:00 PM | 3:00 AM+1 day |
| 7:00 PM | 4:00 AM+1 day |
| 8:00 PM | 5:00 AM+1 day |
| 9:00 PM | 6:00 AM+1 day |
| 10:00 PM | 7:00 AM+1 day |
| 11:00 PM | 8:00 AM+1 day |
Best time to call or meet
Working hours don't overlap fully. The closest fit is 7:00 AM – 9:00 AM in Porto (4:00 PM – 6:00 PM in Guam): working hours on one side, early or late on the other.
Daylight saving time and the difference
The difference changes during the year because Porto and Guam switch clocks on different dates:
- Oct 20, 2026 – Oct 25, 2026: +9h
- Oct 25, 2026 – Mar 28, 2027: +10h
- Mar 28, 2027 – Oct 20, 2027: +9h
More conversions
Questions and answers
What is the time difference between Porto and Guam?
Guam is 9 hours ahead of Porto.
What time is it in Guam when it is 9 AM in Porto?
When it is 9:00 AM in Porto, it is 6:00 PM in Guam.
When is the best time to call Guam from Porto?
Working hours don't overlap fully. The closest fit is 7:00 AM – 9:00 AM in Porto (4:00 PM – 6:00 PM in Guam): working hours on one side, early or late on the other.
Does the time difference between Porto and Guam change?
Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.