Movie: Summer Lovers
It's Girls Gone Wild Greek style, circa 1982.
A very young and beautiful Daryl Hannah and her boyfriend go to the Greek islands for a summer vacation and find uninhibited people and breathless beauty. They wind up in a menage with a French archaeologist also there for the summer.
It's lightweight fun with some decent 80's music. Daryl's nudity was brief and limited, but Valerie Quennessen was much less modest. Sadly, she died in a car wreck in 1989.
In addition, there were plenty of nude beach babes which are included in the clips.