This is a relaxing family island, therefore things to do in Syros are limited. Most beaches in Syros are organized with sunbeds and umbrellas, but they do not have water sports centres with sea games. A nice activity in Syros is also walking, particularly in the streets of the capital town, Ermoupolis, that distinguishes for the elegant architecture.
The countryside of Syros island is great for cycling. There are a couple of bicycle rentals on the island, from where you can rent a bicycle and explore the beaches and villages. The northern side of Syros has dirt roads and is ideal for jeep tours, especially the road to the village of San Mihalis.