London to San Mateo time converter

San Mateo is 8 hours behind London. When it is 9:00 AM in London, it is 1:00 AM in San Mateo.

London BST

Thursday, October 22, 2026

San Mateo PDT

Wednesday, October 21, 2026

London
United Kingdom
Thu, Oct 22
BSTUTC+1
San Mateo
California, United States
Wed, Oct 21
PDTUTC-7-8h
Finding your time zone…
Shared working hours (9:00–18:00)

London to San Mateo conversion table

Every hour of today in London and the matching time in San Mateo. Light rows are typical working hours (9:00–18:00).

LondonSan Mateo
12:00 AM4:00 PM−1 day
1:00 AM5:00 PM−1 day
2:00 AM6:00 PM−1 day
3:00 AM7:00 PM−1 day
4:00 AM8:00 PM−1 day
5:00 AM9:00 PM−1 day
6:00 AM10:00 PM−1 day
7:00 AM11:00 PM−1 day
8:00 AM12:00 AM
9:00 AM1:00 AM
10:00 AM2:00 AM
11:00 AM3:00 AM
12:00 PM4:00 AM
1:00 PM5:00 AM
2:00 PM6:00 AM
3:00 PM7:00 AM
4:00 PM8:00 AM
5:00 PM9:00 AM
6:00 PM10:00 AM
7:00 PM11:00 AM
8:00 PM12:00 PM
9:00 PM1:00 PM
10:00 PM2:00 PM
11:00 PM3:00 PM

Best time to call or meet

Both sides are at work from 5:00 PM – 6:00 PM in London (9:00 AM – 10:00 AM in San Mateo).

Daylight saving time and the difference

The difference changes during the year because London and San Mateo switch clocks on different dates:

  • Oct 22, 2026 – Oct 25, 2026: -8h
  • Oct 25, 2026 – Nov 1, 2026: -7h
  • Nov 1, 2026 – Mar 14, 2027: -8h
  • Mar 14, 2027 – Mar 28, 2027: -7h
  • Mar 28, 2027 – Oct 22, 2027: -8h

Distance

London and San Mateo are 8,632 km (5,364 miles) apart in a straight line.

More conversions

San Mateo to LondonLondon to New YorkLondon to Los AngelesLondon to ChicagoLondon to TorontoLondon to São PauloLondon to ParisLondon to BerlinLondon to MoscowLondon to DubaiLondon to New DelhiLondon to BangkokLondon to Singapore
New York to San MateoLos Angeles to San MateoChicago to San MateoToronto to San MateoSão Paulo to San MateoParis to San MateoBerlin to San MateoMoscow to San MateoDubai to San MateoNew Delhi to San MateoBangkok to San MateoSingapore to San Mateo

Questions and answers

What is the time difference between London and San Mateo?

San Mateo is 8 hours behind London.

What time is it in San Mateo when it is 9 AM in London?

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

When is the best time to call San Mateo from London?

Both sides are at work from 5:00 PM – 6:00 PM in London (9:00 AM – 10:00 AM in San Mateo).

Does the time difference between London and San Mateo change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.