Hola! I'm grew up in the Dominican Republic, so know what type of weather you are talking about.

I would go with something very light and I'd skip a stretchy wrap in this case and go for a woven wrap. Some options are Ellaroo, Didymos - (the ones that are "jacquard" weave though, not the others), Hoppediz "Light One", Ellevill...and I'm thinking there must be others. I will post again if I remember. But, something light is what you are looking for. Also, you may want to consider a short wrap. You won't be able to do as many carries as a long wrap, but you'd have less fabric around you. With a short wrap you can still do a back carry, hip carry, rebozo carry and front carry.