Guam, Mariana Islands, USA is 9 hours ahead of London, England, UK
11:25 pm Monday, in Guam, Mariana Islands, USA is
2:25 pm Monday, in London, England, UK
See distance from Guam to London
Guam doesn't observe daylight saving time but London does. DST in London started on 31 March 2019 and will end on 27 October 2019. Once DST ends, Guam - London time difference will be 10:0 hours.