Guam to Lisbon: time difference
Lisbon is 9 h behind Guam. Live clocks for both, the working hours they share, and how each one sits against your own time.
−9 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Guam 10:55 10:55 AM Lisbon 01:55 1:55 AM You –:–
10:55 10:55 AM
Chamorro Standard Time · UTC+10
☀️ 06:12 · 🌙 18:06
01:55 1:55 AM
Western European Summer Time · UTC+1
☀️ 07:41 · 🌙 19:07
·
−9 h
Lisbon is 9 h behind Guam.
When you, Guam and Lisbon are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇬🇺 Guam
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇵🇹 Lisbon
15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM 0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇬🇺 Guam | 🇵🇹 Lisbon |
|---|---|---|
| Local time | 10:55 | 01:55 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Chamorro Standard Time | Western European Summer Time |
| UTC offset | UTC+10 | UTC+1 |
| Offset from Guam | — | −9 h |
| IANA zone | Pacific/Guam | Europe/Lisbon |
| Daylight saving | Not observed | On summer time → UTC+0, Oct 25, 01:00 |
| Sunrise | 06:12 | 07:41 |
| Sunset | 18:06 | 19:07 |
| Daylight | 11 h 55 min | 11 h 26 min |
| People on this clock | 153,836 | 545,923 |
Compare Guam with another city
More comparisons with Guam: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Guam and Lisbon: common questions
How far behind Guam is Lisbon?
Lisbon is 9 hours behind Guam: UTC+1 against UTC+10.
If it is 9:00 AM in Guam, what time is it in Lisbon?
At 9:00 AM in Guam, clocks in Lisbon show 12:00 AM.
What time is it in Lisbon at the end of the working day in Guam?
The working day in Guam ends at 6:00 PM; in Lisbon it is 9:00 AM at that moment.
Is there a time when both Guam and Lisbon are at work?
No, the working days (9:00 AM–6:00 PM) do not overlap. When the day starts in Guam at 9:00 AM, it is 12:00 AM in Lisbon; the day in Lisbon starts at 6:00 PM in Guam time.
Until what time in Guam is it still yesterday in Lisbon?
Before 9:00 AM in Guam, the date in Lisbon has not changed yet. From 3:00 PM in Lisbon, it is already the next day in Guam.
Is the time difference between Guam and Lisbon the same all year?
No. Only Lisbon switches to summer time, so the gap changes twice a year. From October 25, 2026, Lisbon will be 10 hours behind Guam.
