Time difference between Guam and Portugal: 9 hours
Guam is 9 hours ahead of Portugal
Best time for a call or meeting
Guam 16:00–22:00 = Portugal 07:00–13:00
Business hours never overlap, so these are the hours when both cities are awake (7:00–22:00).
Convert a specific time
Hour-by-hour conversion
| Guam | Portugal |
|---|---|
| 00:00 | 15:00 |
| 01:00 | 16:00 |
| 02:00 | 17:00 |
| 03:00 | 18:00 |
| 04:00 | 19:00 |
| 05:00 | 20:00 |
| 06:00 | 21:00 |
| 07:00 | 22:00 |
| 08:00 | 23:00 |
| 09:00 | 00:00 |
| 10:00 | 01:00 |
| 11:00 | 02:00 |
| 12:00 | 03:00 |
| 13:00 | 04:00 |
| 14:00 | 05:00 |
| 15:00 | 06:00 |
| 16:00 | 07:00 |
| 17:00 | 08:00 |
| 18:00 | 09:00 |
| 19:00 | 10:00 |
| 20:00 | 11:00 |
| 21:00 | 12:00 |
| 22:00 | 13:00 |
| 23:00 | 14:00 |
Daylight saving time can change the difference by season. Shown values reflect the current offset.
Frequently asked questions
How many hours is the time difference between Guam and Portugal?
Guam is 9 hours ahead of Portugal. When it is 12:00 noon in Guam, it is 03:00 in Portugal.
Does daylight saving time affect the difference?
Yes. One or both places observe daylight saving time, so the difference changes with the season. This page shows the current difference.
What is the best time for a call or meeting?
Guam 16:00–22:00 = Portugal 07:00–13:00. Business hours never overlap, so these are the hours when both cities are awake (7:00–22:00).