Could it be Brighton (or Hove)? The shingle on the beach, rather than sand, and the style of the buildings look rather like it. It's certainly a resort that was established quite early from the architecture.
The women's dresses recall the 1940s.
Is there some sort of tower on the skyline in the gap between the buildings in the middle of the picture? That couldn't be part of the Brighton Pavilion, could it? Not sure where that is in relationship to the beach and promenade.
Gillg