Costa da Caparica, just south of Lisbon is a surfers paradise. Here you find 30 kilometer of beach breaks for all surf levels. From low tide lefts at Cova do Vapor to smaller waves at Fonte da Telha, there are lots of beaches and breaks to choose from. Although the waves close to the center of the town (known as CDS) are normally the best due to the jetties giving it more defined peaks, this is also the most crowded area. You can easily find less crowded peaks if you are willing to explore the coast line and drive south.
Costa da Caparica can work all year round and at all tides. In terms of waves size, it fits right in between the west coast around Ericeira and the south coast around Estoril.