Praia Fluvial da Ribeira do Azibo

The beach itself is excellent. The water is super clean and it has all the necessary infrastructure to spend a five-star day (or several) with the family. 

Besides the usual water sports, you can also enjoy pleasant walks or bike rides around the Azibo reservoir in a protected area. And right next door, as a bonus, is the equally wonderful Fraga da Pegada beach.