I yet have to see this one. I seems to be very Rohmeresque - a summer romance, or romances, that features a young male character torn between several women, and incapable of making up his mind, or committing himself. I found a good summary here.
...and some photos of the beach I took, for supporting evidence. The weather has turned to grey so it's at least a reminder of the sunny days:
(I like that lonesome 'parasol')
Those were all taken around here, but the movie was actually shot in Dinard and around, a couple of towns east of here - I was there yesterday, although it was too overcast to show you the likeness. Here's a photo I found online, recognize the striped tents?