I did the FAA/IR in Florida (Naples: Gulf Coast) in two weeks at the end of Feb/beginning March many years ago.
The weather was very good, bright, sunny and with very good vis. : I didn't lose a single day's flying due to weather and flew most mornings and afternoons for 10 days. (tho' for the IR a few days of actual IMC would have been nice).
For the instructor's day off I hired the school a/c for a bimble over the everglades and went in to Everglade City on the way back.
I recall one day being pretty windy but we flew just the same and I got the test on my last day........
I used Naples Air Center, as have many PPRuNers. Although I was not doing PPL stuff the PPL and CPL side seemed pretty busy with a/c well maintained and active and loads of home-grown instructors. At that time they had a strong link with the Netherlands with several Dutch instructors.
They even had one of Hoffmann's (who unwittingly trained some of the 9/11 terrorists) PA28s confiscated after 9/11 on their stand.
IMHO the spring in Fl is worth considering: Give NAC a ring: they advertise in all the flight mags.
I have to stress I was there in early 2000s so things at the flying school may have changed: there will be others on here who have flown there more recently, I'm sure.
I guess if you're in the Americas already the expense would compare with flogging all the way back to UK but you chances of good Wx in Fl are infinitely higher.
Good Luck
Cusco