Blake Griffin was living the life in Miami over the weekend ... where his smokeshow girlfriend, Francesca Aiello, turned every single head on the beach ... for obvious reasons.
Blake and Francesca -- who owns Frankies Bikinis -- have been super tight over the last few months ... ever since the NBA star broke things off with Kendall Jenner.
The two took things to a private cabana in Miami Beach on Sunday with a group of friends -- where they packed on the PDA .