There are not many things to do in Sifnos apart from swimming, snorkeling and walking. Some beaches are organized with sunbeds and umbrellas, but there are no water sports and games. Swimming and dining in seaside taverns are the only things to do in the beaches of Sifnos.
If you enjoy walking, there are many hiking trails that cross Sifnos island and lead to monasteries, small chapels, old towers, and secluded beaches. The best periods for hiking in Sifnos are spring and autumn when the weather is not hot and nature has lovely colors.