Ashley Greene -- Hot & TOPLESS In NY

It was only 71 degrees on Staten Island yesterday, but Ashley Greene made it seem a whole lot hotter ... flashing some side boob in a teeny yellow bikini during a movie shoot in NY.

A pink and white beach blanket just barely managed to conceal the goods ... as Ashley filmed a scene for "Staten Island Summer" at the Great Kills Swim Club ... where some of the locals were used as extras.

The movie's about a couple of dudes who take jobs as lifeguards while trying to figure out what to do with their lives.

Why would you ever do anything else?