This beach is easily accessible from the city center and yet not so crowded. Good for families with children, too.
More information at saint-tropez.fr http://www.saint-tropez.fr/fr/Meretport/Lesplages/PlagedelaBouillabaisse/tabid/421/Default.aspx
Address (Unnamed Road), Saint-Tropez 83990, France
Coordinates 43°16'10.135" N 6°37'58.755" E