There are several kinds of beaches: sand, rock, gravel and stone: there is one for every taste. There are also less visited beaches which you can reach by bike and on foot like

Galenzana
Fonza and
Palombaia.

Popular beaches which are slightly more distant are:

Cavoli, ca. 5 km
Pomonte, ca. 15 km
Lacona, ca. 5 km
Marciana Marina, ca. 12 km
Scaglieri, ca 10 km.