Praia da Poça, also known as São João do Estoril, is a popular little beach at the start of the Estoril - Cascais coast. As with all the beaches along this stretch there is the wide promenade running behind, with a couple of places to eat.
Access at Praia da Poça is good. Just a short distance from the N6 "Marginal" road and about halfway between São João and Estoril train stations, getting here is easy too.