Praia do Meco is an amazingly huge
and beautiful beach, perfect for naturism and camping, with pine forests around, high cliffs and springs with fresh water. Apparently you can also do paragliding there, maybe also naked?
Although one of the best on the Lisbon coast, this beach is a little challenging to reach by public transportation. You have to take the bus to Sesimbra from Lisbon’s Praça de Espanha bus terminal, and get off at Santana. From there, around 8 buses daily run to Meco village. Be sure to ask for a timetable for your return trip.