I would suggest finding a way to measure the average temperatures in your pond during the hottest part of the day over a week or so. I live in Central Fl on the East coast and have a shaded pond about three feet deep. The bottom half of the pond stays quite cool all summer--I would have to guess in the mid/upper 60s. However, a pond in indirect or direct sun is going to be a different story.
Even if temperatures are permitting, I would be wary for reasons stated by other members before this post!
Native Florida pond inhabitants are not the most welcoming of creatures either...leeches, gators, amphiumas, alligator snapping turtles, etc. I have found all four plus more in my four foot long decoration pond. Eek.