As has been said, the problem will be to find a school that can accommodate a part-year pupil. Presumably you would return to a base mooring each winter so she could go to the same school, rather than try to find a new school every time, which might well be impossible.
I would expect a public school, which would get paid for it, is more likely to be accommodating than a state school, though as there are now several kinds of school (academy, free, council run) and the system is so fragmented it's very hard to say. And the academies change hands, so an agreement made at one time may well be reneged on. Free schools may use unqualified teachers.
The education system is now a disorganised mess and you have to bear that in mind, there's no central place to check. Maybe best to decide where you want to winter and contact all the local schools for their advice, labour intensive though it is.