Random Lisboa when it was still summer and warm!
Costa da Caparica, at the western coast of Setúbal and a somewhat an hour drive from Lisbon is a super popular beach destination among normal beach-goers but especially surfers. The beach line 30 km long making it the longest contiguous one in Portugal. Not the summer weather yet when I visited there for the first time in May but will be back now that the summer has arrived in Portugal!