Groton, CT to Seattle, WA: time difference
Seattle, WA is 3 h behind Groton, CT. 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.
Groton, CT 18:07 6:07 PM Seattle, WA 15:07 3:07 PM You –:–
18:07 6:07 PM
Eastern Daylight Time · UTC-4
☀️ 07:06 · 🌙 18:01
15:07 3:07 PM
Pacific Daylight Time · UTC-7
☀️ 07:36 · 🌙 18:13
·
−3 h
Seattle, WA is 3 h behind Groton, CT.
When you, Groton, CT 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
🇺🇸 Groton, CT
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
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Time zones side by side
| Detail | 🇺🇸 Groton, CT | 🇺🇸 Seattle, WA |
|---|---|---|
| Local time | 18:07 | 15:07 |
| Local date | Tuesday, October 20, 2026 | Tuesday, October 20, 2026 |
| Time zone | Eastern Daylight Time | Pacific Daylight Time |
| UTC offset | UTC-4 | UTC-7 |
| Offset from Groton, CT | — | −3 h |
| IANA zone | America/New York | America/Los Angeles |
| Daylight saving | On summer time → UTC-5, Nov 1, 01:00 | On summer time → UTC-8, Nov 1, 01:00 |
| Sunrise | 07:06 | 07:36 |
| Sunset | 18:01 | 18:13 |
| Daylight | 10 h 55 min | 10 h 37 min |
| People on this clock | 40,115 | 737,015 |
Compare Groton, CT with another city
More comparisons with Groton, CT: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Groton, CT and Seattle, WA: common questions
How many hours behind Groton, CT, is Seattle, WA?
The clocks in Seattle are 3 hours behind those in Groton (UTC−7 and UTC−4).
What time is it in Seattle, WA, when it is 9:00 AM in Groton, CT?
When it is 9:00 AM in Groton, it is 6:00 AM in Seattle.
What time is it in Seattle, WA, at the end of the working day in Groton, CT?
The working day in Groton ends at 6:00 PM; in Seattle it is 3:00 PM at that moment.
When is a good time to call Seattle, WA, from Groton, CT?
Between 12:00 PM and 6:00 PM in Groton – that is 9:00 AM to 3:00 PM in Seattle – both places are within working hours (9:00 AM–6:00 PM).
When does the date change in Seattle, WA, compared with Groton, CT?
The new day starts in Seattle later: until 3:00 AM in Groton, it is still the previous day there. From 9:00 PM in Seattle, Groton is already on the next day.
Does the time difference between Groton, CT, and Seattle, WA, change?
No. The clocks in Groton and in Seattle change on the same dates, so the difference stays 3 hours.
