The best time to move your fuchsia is when it's dormant. A good dry day in December / January is best.
But to be sure, to be sure, why not take some cuttings now.If the move fails, then at least the cuttings will have succeeded and they will be part of the original plant. To take cuttings from fuchsias see this page:
The cutting process normally occurs in Spring but if you can overwinter the plants then now is also a good time.