Boston to Seattle Time Difference
Seattle is 3 hours behind Boston. When it's 08:57:35 AM in Boston, it's 05:57:35 AM in Seattle.
How Many Hours Behind Is Seattle From Boston?
Seattle is 3 hours behind Boston. So Boston is 3 hours ahead of Seattle looking the other way — the same gap, described from the other end.
In practice that means a working day in Boston starts when it is already 6:00 AM in Seattle. The gap is not fixed all year: it becomes 2 hours on Sunday, November 1, 2026, when Boston changes its clocks.
Best Time to Call Boston and Seattle
Both cities are inside normal business hours between 12:00 PM and 5:00 PM in Boston — that's 9:00 AM to 2:00 PM in Seattle. That's a 5-hour window, so a call fits comfortably in either side's working day.
both at work Boston only Seattle only neither — hours shown along the strip are Boston local time.
Convert a Specific Time
Pick any date and time in Boston to see the exact equivalent in Seattle.
Common Times Converted
Boston time on the left, Seattle time on the right.
Boston to Seattle: Full 24-Hour Conversion Table
Based on today, Sunday, October 11, 2026 in Boston. Shaded rows are working hours; the darker shade marks the hours when both cities are at work.
| Boston | Seattle | Working hours |
|---|---|---|
| 12:00 AM | 9:00 PM prev day | — |
| 1:00 AM | 10:00 PM prev day | — |
| 2:00 AM | 11:00 PM prev day | — |
| 3:00 AM | 12:00 AM | — |
| 4:00 AM | 1:00 AM | — |
| 5:00 AM | 2:00 AM | — |
| 6:00 AM | 3:00 AM | — |
| 7:00 AM | 4:00 AM | — |
| 8:00 AM | 5:00 AM | — |
| 9:00 AM | 6:00 AM | Boston only |
| 10:00 AM | 7:00 AM | Boston only |
| 11:00 AM | 8:00 AM | Boston only |
| 12:00 PM | 9:00 AM | Both cities |
| 1:00 PM | 10:00 AM | Both cities |
| 2:00 PM | 11:00 AM | Both cities |
| 3:00 PM | 12:00 PM | Both cities |
| 4:00 PM | 1:00 PM | Both cities |
| 5:00 PM | 2:00 PM | Seattle only |
| 6:00 PM | 3:00 PM | Seattle only |
| 7:00 PM | 4:00 PM | Seattle only |
| 8:00 PM | 5:00 PM | — |
| 9:00 PM | 6:00 PM | — |
| 10:00 PM | 7:00 PM | — |
| 11:00 PM | 8:00 PM | — |
Understanding the Boston – Seattle Time Difference
Boston runs on America/New_York, currently EDT (UTC-4:00). Seattle runs on America/Los_Angeles, currently PDT (UTC-7:00). The gap of 3 hours is simply the distance between those two offsets.
Both cities observe Daylight Saving Time, but they don't switch on the same date — so for a few weeks each year the gap between them is different again. The next shift is on Sunday, November 1, 2026, when Boston adjusts its clocks and the difference becomes 2 hours. Anything scheduled across that date needs checking again.
Full clock-change dates: Daylight Saving Time in the United States.
Boston today
Seattle today
Frequently Asked Questions
What is the time difference between Boston and Seattle?
Seattle is currently 3 hours behind Boston. That gap becomes 2 hours on Sunday, November 1, 2026, when Boston changes its clocks.
How many hours behind is Seattle from Boston?
Seattle is 3 hours behind Boston. Looking at it the other way, Boston is 3 hours ahead of Seattle.
What time is it in Seattle when it is 9:00 AM in Boston?
When it is 9:00 AM in Boston, it is 6:00 AM in Seattle.
Is Seattle ahead of or behind Boston?
Seattle is 3 hours behind Boston. Boston reaches each point in the day first, so Seattle is still getting started while the Boston working day is finishing.
What is the best time to call between Boston and Seattle?
Between 12:00 PM and 5:00 PM Boston time, which is 9:00 AM to 2:00 PM in Seattle. Both cities are inside normal business hours during that window.
Does the time difference between Boston and Seattle change during the year?
Yes. Both cities observe Daylight Saving Time, and they do not always switch on the same date, so the gap between them shifts during the year. It changes to 2 hours on Sunday, November 1, 2026.
What time zones are Boston and Seattle in?
Boston uses the America/New_York time zone, currently EDT (UTC-4:00). Seattle uses America/Los_Angeles, currently PDT (UTC-7:00).