From Sifnos: Antiparos and Despotiko Tour｜Greece

Take a speedboat tour around Antiparos and Despotiko from Sifnos. Stop at out-of-the-way spots and enjoy the clear waters and views of the coast.
Meet your boat at the Platis Gialos Marina. Sail northeast and admire some of the local beaches along the way. See Chryssopigi, Apokofto and the 3 beaches of Faros. Next, sail past the tiny, uninhabited island of Strogilli, the first of the Antiparos Islands.

Afterward, arrive at Despotiko, the second small island of Antiparos. Go for a swim at the long, sandy beach of Livadi, it's long, sandy beach and swim for as long as you'd like.

When you're done swimming, head to Epitafios, the rocky, volcanic area of the island. Stop for a visit to the Seal’s Cave.

Next, enter the Despotiko-Antiparos strait and visit Agios Georgios. Experience one of the picturesque beaches: Kako Rema, Ai Giorgis, or Plakakia.
Stop for lunch (not included) at one of the many taverns of Agios Georgios, such as the famous Pipinos. On your way back, pass by the small islet of Tsimintiri.