I've been to the
playa del Parador in Mazagon several times. It's not rated very highly in comparitive ratings, but I like it (Relatives have a couple of Condos in Mazagon). Chipiona is very popular with U.S. Military people from nearby Rota Naval Base but the closest I have been to Chipiona playa is el Puerto de Santa Maria.
If I was going as far as Ayamonte I think I would continue on to Faro or Lagos in the Portuguese Algarve.
I may try to make it back to Mazagon for
Semana Santa when relatives from Madrid come down to open up their summer place. I think I might try Matalascañas next time because of its proximity to
el Santuario de la Virgen del Rocio and its golf facilities.