After several days of walking around Rome in very hot weather, we decided to go to the beach for some R and R. Took the advice of other TripAdvisor members and it worked. Just wanted to share some tips.
Although the beach is technically 30 minutes from Rome, it took us 1.5 hours door to door. It was a pleasant ride, all on public transportation and very worth it.
We took a bus from our apartment to the Metro B line heading toward Laurentina. From there: get off at the Pyramide station. At the top of the stairs, turn left and head toward the Roma Porto San Paulo station. Take the train (use the same ticket that you used for the bus and metro, it's good for 75 minutes). Get off at Lido Centro. From there, take the #62, 05 or 15 bus to the Paolo Tuscanelli street, which goes along the beach. We asked the driver to let us know when we were at the "ingresso libera" which is the free beach. He happened to drop us at Faber Beach, but there are others. (Not much English spoken here, bring an Italian phrase book).
We had a very nice day. The beach was crowded, but clean. We paid 5Euro for an umbrella. We just used our towels to lie on, but we could have rented chairs. There was a free bathroom (bring toilet paper and hand sanitizer) and many little restaurants for sandwiches.
The funniest thing to us was the number of people who walk along the beach selling everything that you can imagine: rafts, bathing suits, toiletries, jewelry. My daughter and I each bought a bathing suit for 3 Euro! We were able to walk along the beach, even passed the non-free beaches. It's all the same sand and ocean, but if you want a cabana and matching umbrellas, then you pay more. We had a nice day and then reversed the directions to go home. Hope this helps.