Mar Bella beach is about 512 metres long. Located eastwards on the Barcelona seafront, it is one of the beaches that emerged from the urban redevelopment of the seafront carried out in 1992 for the Barcelona Olympics.

Mar Bella beach belongs to the Sant Martí district and it is mostly used by residents from this area, who go there regularly and in large numbers.

The beach has a designated nudist area. Near the Bac de Roda breakwater there is a children's playground and a volleyball court.

Other recreational facilities on Mar Bella beach include a basketball hoop, a skateboard rink and a ping-pong table located on the higher part of the promenade (Passeig Marítim), near the Mar Bella sports pavilion.

There is also a nautical centre with water sports facilities at the western end of the beach.

Mar Bella beach provides easy access and enjoyment for everyone, with special attention paid to those whose mobility is limited in some way: it features parking areas from which it is easy to reach the dry beach, visual and tactile signage and information, adapted toilets, wooden walkways that reach the water as close as possible (although, under no circumstances will they ever touch the water, as its currents could detach the module) and adapted showers with chairs. The public transport has also been adapted to provide easier access.

On the beach of Mar Bella is flying the Ecoplayas flag as recognition of its quality and services.