Time difference between London and Seattle

Seattle is 8 hours behind London.

United Kingdom · British Summer Time

8:43 AM

Wednesday, October 21, 2026

United States · Pacific Daylight Time

12:43 AM

Wednesday, October 21, 2026

London to Seattle time converter

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

What is the time difference between London and Seattle?

Seattle is 8 hours behind London. London is on UTC+1 and Seattle is on UTC−7.

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

When it is 9:00 AM in London, it is 1:00 AM in Seattle.

When is the best time to call Seattle from London?

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

Does the time difference between London and Seattle change?

Yes. Because of daylight saving time, the difference changes on Sunday, October 25, 2026, when Seattle will be 7 hours behind London.

London is 8 hours ahead of Seattle. More: time in London · time in Seattle