Visit Carcavelos Beach. It’s easy to get there. Just jump on the train at Cais do Sodré and get out at Carcavelos. It’s just a 10 Minute walk to the beach. The beach stretches around 5 km and is quite popular. There are plenty of bars and restaurants around. It can be quite packed, but there’s always enough space for beach football or even playing “catch” without anoying others around you.