Portsmouth to Seattle, WA: time difference
Seattle, WA is 3 h behind Portsmouth. Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Portsmouth 05:57 5:57 AM Seattle, WA 02:57 2:57 AM You –:–
05:57 5:57 AM
Atlantic Standard Time · UTC-4
☀️ 05:57 · 🌙 17:50
02:57 2:57 AM
Pacific Daylight Time · UTC-7
☀️ 07:22 · 🌙 18:32
·
−3 h
Seattle, WA is 3 h behind Portsmouth.
When you, Portsmouth and Seattle, WA are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇩🇲 Portsmouth
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
🇺🇸 Seattle, WA
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 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇩🇲 Portsmouth | 🇺🇸 Seattle, WA |
|---|---|---|
| Local time | 05:57 | 02:57 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Atlantic Standard Time | Pacific Daylight Time |
| UTC offset | UTC-4 | UTC-7 |
| Offset from Portsmouth | — | −3 h |
| IANA zone | America/Dominica | America/Los Angeles |
| Daylight saving | Not observed | On summer time → UTC-8, Nov 1, 01:00 |
| Sunrise | 05:57 | 07:22 |
| Sunset | 17:50 | 18:32 |
| Daylight | 11 h 52 min | 11 h 11 min |
| People on this clock | 3,633 | 737,015 |
Compare Portsmouth with another city
More comparisons with Portsmouth: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Portsmouth and Seattle, WA: common questions
What is the time difference between Portsmouth and Seattle, WA?
Seattle is 3 hours behind: it uses UTC−7, while Portsmouth is on UTC−4.
What time is it in Seattle, WA, at the start of the working day in Portsmouth?
The working day in Portsmouth starts at 9:00 AM; in Seattle it is 6:00 AM at that moment.
What time is it in Seattle, WA, when it is 6:00 PM in Portsmouth?
When it is 6:00 PM in Portsmouth, it is 3:00 PM in Seattle.
Is there a time when both Portsmouth and Seattle, WA, are at work?
Yes: from 12:00 PM to 6:00 PM in Portsmouth (9:00 AM to 3:00 PM in Seattle), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Seattle, WA, compared with Portsmouth?
The new day starts in Seattle later: until 3:00 AM in Portsmouth, it is still the previous day there. From 9:00 PM in Seattle, Portsmouth is already on the next day.
Is the time difference between Portsmouth and Seattle, WA, the same all year?
No. Only Seattle switches to summer time, so the gap changes twice a year. From November 1, 2026, Seattle will be 4 hours behind Portsmouth.
