Galissas Beach
Galissas is a sandy cosmopolitan beach with many amenities (sunbeds, umbrellas, water sports) and taverns. The beach is basically very crowdie from families staying on the hotel that is located on the edge of the cliff. On the other hand since you will be approaching with a yacht the bay has really nice waters to relax and swim. We encourage you to try the restaurant right on the side of the hotel, last on the right side. Really worth trying.
"Regardless the minus we have commented I feel that Syros is really an island worth visiting since in diversifies from the Cyclades but still is the strongest island of the Cycladic complex-our professional advice will guide you to select the options we have tried out and keep you away from tourist traps that as you can imagine exist on such a busy island"
Eugene