Seattle, WA to Cambridge, MA: time difference
Cambridge, 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 12:33 12:33 PM Cambridge, MA 15:33 3:33 PM You –:–
12:33 12:33 PM
Pacific Daylight Time · UTC-7
☀️ 07:33 · 🌙 18:17
15:33 3:33 PM
Eastern Daylight Time · UTC-4
☀️ 07:01 · 🌙 17:59
·
+3 h
Cambridge, MA is 3 h ahead of Seattle, WA.
When you, Seattle, WA and Cambridge, 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
🇺🇸 Cambridge, 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
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Time zones side by side
| Detail | 🇺🇸 Seattle, WA | 🇺🇸 Cambridge, MA |
|---|---|---|
| Local time | 12:33 | 15:33 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 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 | 07:33 | 07:01 |
| Sunset | 18:17 | 17:59 |
| Daylight | 10 h 44 min | 10 h 58 min |
| People on this clock | 737,015 | 105,162 |
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 Cambridge, MA: common questions
What is the time difference between Seattle, WA, and Cambridge, MA?
Cambridge is 3 hours ahead: it uses UTC−4, while Seattle is on UTC−7.
What time is it in Cambridge, MA, when it is 9:00 AM in Seattle, WA?
When it is 9:00 AM in Seattle, it is 12:00 PM in Cambridge.
What time is it in Cambridge, MA, when it is 6:00 PM in Seattle, WA?
When it is 6:00 PM in Seattle, it is 9:00 PM in Cambridge.
When do working hours in Seattle, WA, and in Cambridge, 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 Cambridge.
From what time in Seattle, WA, is it tomorrow in Cambridge, MA?
Once it is 9:00 PM in Seattle, the date in Cambridge has already changed. Until 3:00 AM in Cambridge, it is still the previous day in Seattle.
Is the time difference between Seattle, WA, and Cambridge, MA, the same all year?
Yes. Both places switch to summer time and back on the same dates, so the gap remains 3 hours.
