Coastal sites in France

We have spent 12 wonderful summers in Brittany in a static van, having sold that, we now want to go further, and to get better weather, it has to be said.  We are beach people therefore want to be near the coast and are not particularly concerned with having a pool on site.  We would prefer a fairly quiet site where we could get better weather than Brittany.   Not right down south, but perhaps mid-way.  I am 74 and my husband is 80.  We do a lot of touring in UK for the rest of the year but do want to continue spending our usual month or so in France.   Any ideas with regard to sites anyone??    JudyR