Moving to the seaside (south west coast)

Hi, My husband and I, with our 2 teenage boys have been living in the Dordogne for the past 14 years.
We have decided to move to the coast, Biscarrosse, Sanguinet or close.
Wondering if there are people on this forum with connections to this area. We are all fluent in french, but always nice to communicate in our mother tongue.
Could also do with advice on what are good areas etc. Looking to rent to start with, to get a feel for the area.