It was Nadal's first tournament triumph since last June, when he won the French Open for the second straight time.
Nadal won five times last season and 11 times in 2005. He got to the finals of this tournament with a 6-4, 6-3, decision over Andy Roddick.
The champion did not lose a set during the entire tournament.
Swim Week Miami Beach 2014 [PHOTOS]