Family seaside portrait - July 1966

A family snapshot taken on a beach somewhere in July 1966 on Kodachrome.

This seems to be a portrait of three generations of the same family. I assume this is mother, daughter and grand-daughter standing on a beach next to the water's edge. In the background behind them is a white house, which could be a hotel and some other buildings in the background. To the left of the white house is what seems to be a coach part and a road. I don't know either the general location of this picture or even the country, but the date is July 1966.