Seattle (Pacific) to London — Time Zone Converter
PT (UTC-7) → GMT/BST (UTC+1). London is 8 hours ahead relative to Seattle (Pacific) right now.
Seattle (Pacific)
Oct 7, 2026, 4:55 AM
London
Oct 7, 2026, 12:55 PM
Sample times — PT to GMT/BST
Sample conversions for today; daylight saving applied.
About Seattle (Pacific) and LondonSeattle (Pacific) vs London time difference through 2026
The gap changes 4 times during 2026, because Seattle (Pacific) and London switch to and from daylight saving time on different dates. Double-check meetings booked in the weeks around each switch.
Dates (2026) PT GMT/BST Difference Jan 1 – Mar 7 UTC−8 UTC London is 8 hours ahead Mar 8 – Mar 28 UTC−7 UTC London is 7 hours ahead Mar 29 – Oct 24 UTC−7 UTC+1 London is 8 hours ahead Oct 25 – Oct 31 UTC−7 UTC London is 7 hours ahead Nov 1 – Dec 31 UTC−8 UTC London is 8 hours ahead
Transition dates are the first full day on the new offset; clocks usually change overnight, between 1:00 and 3:00 local time.
Method & sources
Offsets and daylight-saving dates are computed from the IANA Time Zone Database through the JavaScript Intl API — the same rules your phone and computer use. The year table above was generated from those rules when this page was built; the live converter uses the rules installed in your own browser, so it stays correct if a country changes its clocks.
Page last updated: October 1, 2026
Seattle (Pacific) vs London time difference through 2026
The gap changes 4 times during 2026, because Seattle (Pacific) and London switch to and from daylight saving time on different dates. Double-check meetings booked in the weeks around each switch.
| Dates (2026) | PT | GMT/BST | Difference |
|---|---|---|---|
| Jan 1 – Mar 7 | UTC−8 | UTC | London is 8 hours ahead |
| Mar 8 – Mar 28 | UTC−7 | UTC | London is 7 hours ahead |
| Mar 29 – Oct 24 | UTC−7 | UTC+1 | London is 8 hours ahead |
| Oct 25 – Oct 31 | UTC−7 | UTC | London is 7 hours ahead |
| Nov 1 – Dec 31 | UTC−8 | UTC | London is 8 hours ahead |
Transition dates are the first full day on the new offset; clocks usually change overnight, between 1:00 and 3:00 local time.
Method & sources
Offsets and daylight-saving dates are computed from the IANA Time Zone Database through the JavaScript Intl API — the same rules your phone and computer use. The year table above was generated from those rules when this page was built; the live converter uses the rules installed in your own browser, so it stays correct if a country changes its clocks.
Page last updated: October 1, 2026
Seattle to London is an eight-hour transatlantic jump for cloud, gaming, and aerospace teams. A Seattle 8:00 AM start is already 4:00 PM in London, marking the tail end of the daily overlap.
Frequently asked questions
What is the time difference between Seattle (Pacific) and London?
Right now the offset is about 8 hours ahead (from PT to GMT/BST). Daylight saving rules differ by region, so use the converter and table above rather than memorising a single number year-round.
Does daylight saving affect Seattle (Pacific) vs London?
Yes, whenever either region springs forward or falls back, the gap can shift by an hour. This page uses the IANA time-zone database so those transitions are applied automatically.
How do I schedule a meeting across the US Pacific Northwest and the United Kingdom?
Pick a time in the converter, share both columns with attendees, and avoid early-morning or late-night slots on one side. The sample table lists common business hours in the source zone.
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