Sydney is 10 hours ahead of London right now.
The gap between London and Sydney is not fixed. It moves between 9 hours and 10 hours and 11 hours during the year, because the two cities change their clocks on different dates, or only one of them changes at all. The table gives exact dates for the rest of 2026 and for 2027.
Time difference by date
| Dates | Sydney compared with London | Zones |
|---|---|---|
| Until 25 Oct 2026 | 10 hours ahead | BST (UTC+1) / AEDT (UTC+11) |
| 25 Oct 2026 to 28 Mar 2027 | 11 hours ahead | GMT (UTC+0) / AEDT (UTC+11) |
| 28 Mar 2027 to 4 Apr 2027 | 10 hours ahead | BST (UTC+1) / AEDT (UTC+11) |
| 4 Apr 2027 to 3 Oct 2027 | 9 hours ahead | BST (UTC+1) / AEST (UTC+10) |
| 3 Oct 2027 to 31 Oct 2027 | 10 hours ahead | BST (UTC+1) / AEDT (UTC+11) |
| From 31 Oct 2027 | 11 hours ahead | GMT (UTC+0) / AEDT (UTC+11) |
Worked examples around the clock changes
The same local time in London lands at a different time in Sydney either side of each change:
- London changes its clocks on Sunday 25 October 2026. Before the change, on Friday 23 October 2026, 09:00 in London is 19:00 in Sydney (10 hours ahead). After it, on Monday 26 October 2026, 09:00 in London is 20:00 in Sydney (11 hours ahead).
- London changes its clocks on Sunday 28 March 2027. Before the change, on Friday 26 March 2027, 09:00 in London is 20:00 in Sydney (11 hours ahead). After it, on Monday 29 March 2027, 09:00 in London is 19:00 in Sydney (10 hours ahead).
- Sydney changes its clocks on Sunday 4 April 2027. Before the change, on Friday 2 April 2027, 09:00 in London is 19:00 in Sydney (10 hours ahead). After it, on Monday 5 April 2027, 09:00 in London is 18:00 in Sydney (9 hours ahead).
- Sydney changes its clocks on Sunday 3 October 2027. Before the change, on Friday 1 October 2027, 09:00 in London is 18:00 in Sydney (9 hours ahead). After it, on Monday 4 October 2027, 09:00 in London is 19:00 in Sydney (10 hours ahead).
- London changes its clocks on Sunday 31 October 2027. Before the change, on Friday 29 October 2027, 09:00 in London is 19:00 in Sydney (10 hours ahead). After it, on Monday 1 November 2027, 09:00 in London is 20:00 in Sydney (11 hours ahead).
Working hours overlap
When the 09:00–17:00 working days in London and Sydney overlap, on a mid-week day in each period:
- Until 25 Oct 2026: no overlap. One side has to start early or stay late. Use the meeting planner to find the least inconvenient slot.
- 25 Oct 2026 to 28 Mar 2027: no overlap. One side has to start early or stay late. Use the meeting planner to find the least inconvenient slot.
- 28 Mar 2027 to 4 Apr 2027: no overlap. One side has to start early or stay late. Use the meeting planner to find the least inconvenient slot.
- 4 Apr 2027 to 3 Oct 2027: no overlap. One side has to start early or stay late. Use the meeting planner to find the least inconvenient slot.
- 3 Oct 2027 to 31 Oct 2027: no overlap. One side has to start early or stay late. Use the meeting planner to find the least inconvenient slot.
- From 31 Oct 2027: no overlap. One side has to start early or stay late. Use the meeting planner to find the least inconvenient slot.