Hmmm, that was a new input - you ride surfboards ?
As here, in Denmark, everybody with a surfboard, no matter what weight - got a smaller kite than a 7m2, as this is the "standard" not very small kite in waves.
So 4-5-6m2 kites is a must too
But I have no experience with the carribian as said - and maybe there is not that much wind in general ?

Peter