Time difference between Seattle and London

London is 8 hours ahead of Seattle.

United States · Pacific Standard Time

4:30 PM

Wednesday, November 11, 2026

United Kingdom · Greenwich Mean Time

12:30 AM

Thursday, November 12, 2026

Seattle to London time converter

Green rows are office hours in both places; light green rows are when both are awake.

What is the time difference between Seattle and London?

London is 8 hours ahead of Seattle. Seattle is on UTC−8 and London is on UTC+0.

What time is it in London when it is 9 AM in Seattle?

When it is 9:00 AM in Seattle, it is 5:00 PM in London.

When is the best time to call London from Seattle?

The best time to call or meet is 9:00 AM–10:00 AM in Seattle (5:00 PM–6:00 PM in London), when both places are in normal office hours.

Which days are working days in both Seattle and London?

Both Seattle and London usually work Monday to Friday.

Does the time difference between Seattle and London change?

Yes. Because of daylight saving time, the difference changes on Sunday, March 14, 2027, when London will be 7 hours ahead of Seattle.

Seattle is 8 hours behind London. More: time in Seattle · time in London