Seattle, WA to Boston, MA: time difference
Boston, MA is 3 h ahead of Seattle, WA. 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.
Seattle, WA 20:51 8:51 PM Boston, MA 23:51 11:51 PM You –:–
20:51 8:51 PM
Pacific Daylight Time · UTC-7
☀️ 07:20 · 🌙 18:34
23:51 11:51 PM
Eastern Daylight Time · UTC-4
☀️ 06:51 · 🌙 18:14
·
+3 h
Boston, MA is 3 h ahead of Seattle, WA.
When you, Seattle, WA and Boston, MA are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇺🇸 Seattle, WA
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
🇺🇸 Boston, MA
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 0 12 AM 1 1 AM 2 2 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
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Time zones side by side
| Detail | 🇺🇸 Seattle, WA | 🇺🇸 Boston, MA |
|---|---|---|
| Local time | 20:51 | 23:51 |
| Local date | Friday, October 9, 2026 | Friday, October 9, 2026 |
| Time zone | Pacific Daylight Time | Eastern Daylight Time |
| UTC offset | UTC-7 | UTC-4 |
| Offset from Seattle, WA | — | +3 h |
| IANA zone | America/Los Angeles | America/New York |
| Daylight saving | On summer time → UTC-8, Nov 1, 01:00 | On summer time → UTC-5, Nov 1, 01:00 |
| Sunrise | 07:20 | 06:51 |
| Sunset | 18:34 | 18:14 |
| Daylight | 11 h 14 min | 11 h 23 min |
| People on this clock | 737,015 | 675,647 |
Compare Seattle, WA with another city
More comparisons with Seattle, WA: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Seattle, WA and Boston, MA: common questions
How many hours ahead of Seattle, WA, is Boston, MA?
The clocks in Boston are 3 hours ahead of those in Seattle (UTC−4 and UTC−7).
What time is it in Boston, MA, when it is 9:00 AM in Seattle, WA?
When it is 9:00 AM in Seattle, it is 12:00 PM in Boston.
What time is it in Boston, MA, at the end of the working day in Seattle, WA?
The working day in Seattle ends at 6:00 PM; in Boston it is 9:00 PM at that moment.
When do working hours in Seattle, WA, and in Boston, MA, overlap?
Working hours (9:00 AM–6:00 PM) overlap from 9:00 AM to 3:00 PM in Seattle, which is 12:00 PM to 6:00 PM in Boston.
When does the date change in Boston, MA, compared with Seattle, WA?
The new day starts in Boston earlier: at 9:00 PM in Seattle it is already midnight there. Until 3:00 AM in Boston, Seattle is still on the previous day.
Is the time difference between Seattle, WA, and Boston, MA, the same all year?
Yes. Both places switch to summer time and back on the same dates, so the gap remains 3 hours.
