Beach options from Lisbon:
- Zambujeira do Mar (~3h drive - rent a car & stay a night): This little fishing village has no shortage of beautiful beaches, traditional food from Alentejo, and small local shops for you to browse. You can also join the locals from Aug 2-6 for the Festival do Sudoeste, one of Portugal's most popular summer music festivals.
- Comporta (1.5h drive): This beach town is more high-end and may be crowded because of its proximity to Lisbon and infrastructure/amenities. Here, you can opt for one of the three main beaches - Praia do Pego, Praia da Comporta, or Praia do Carvalhal - and even experience riding a horse through the beach and rice paddies.