Sharni Vinson at Miami Beach

Australian actresses Sharni Vinson taking dip at Miami Beach at 10 july

The "Blue Crush 2" actress wasn't exactly in surfing attire in her mismatched bikini consisting of a rainbow colored top and black bottoms and seemed to enjoy the scorching temps tweeting, "Miami meltdown."

The 28-year-old slim and trim beauty is currently dating "Twilight" actor Kellan Lutz, who later joined her on the beach.