The colours are nice in the sky.. the beach itself seems a little dark and underexposed.. also .. i guess the composition isn't particularly eye grabbing. It's hard though, it doesn't look like there was much to work with, so i think you stil ldid a decent job.
All the horizontals are nice. The fence and people add some verticals and look nice silhouetted. Like the darker tones telling me that "Life isn't always a day at the beach." Good post Gael.