What is the time difference between Sydney and London?

The gap ranges from 9 to 11 hours depending on the time of year, making it one of the most variable and complex of common city pairs. It is 9 hours during Southern Hemisphere winter / Northern Hemisphere summer (AEST/BST) and 11 hours during Southern Hemisphere summer / Northern Hemisphere winter (AEDT/GMT).

What is the best meeting time for Sydney and London?

The best window is very early London morning / end-of-business Sydney: 7–8 AM London / 4–6 PM Sydney (during AEST/BST). In winter (GMT/AEDT), the gap widens to 11 hours, requiring 7 AM London / 6 PM Sydney — barely within hours for both.

Why does the Sydney–London gap vary so much?

Because Sydney and London observe DST in opposite hemispheres, they are sometimes both on summer time, sometimes both on winter time, and sometimes one on each. This creates four distinct gap configurations across the year: 9, 10, 10, and 11 hours.

Best Meeting Times Between Sydney and London

July 11, 2026

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Frequently Asked Questions

What is the time difference between Sydney and London?: The gap ranges from 9 to 11 hours depending on the time of year, making it one of the most variable and complex of common city pairs. It is 9 hours during Southern Hemisphere winter / Northern Hemisphere summer (AEST/BST) and 11 hours during Southern Hemisphere summer / Northern Hemisphere winter (AEDT/GMT).
What is the best meeting time for Sydney and London?: The best window is very early London morning / end-of-business Sydney: 7–8 AM London / 4–6 PM Sydney (during AEST/BST). In winter (GMT/AEDT), the gap widens to 11 hours, requiring 7 AM London / 6 PM Sydney — barely within hours for both.
Why does the Sydney–London gap vary so much?: Because Sydney and London observe DST in opposite hemispheres, they are sometimes both on summer time, sometimes both on winter time, and sometimes one on each. This creates four distinct gap configurations across the year: 9, 10, 10, and 11 hours.