Not rated but would probably be PG-13 because of some thematic elements, sensuality and language.
Two teen boys kiss as a dare. Several young teens are regularly seen in skimpy swimsuits that show cleavage and part of their butt (girls) that are common in Brazil but maybe more revealing than what is normally seen in the US.
There are a few scenes depicting sexual activity, including seeing a man fully nude from behind (very brief and slightly out of focus) but otherwise there is no nudity.