Naxos is one of the best kitesurfing destinations in Greece. The uncontested spot is Mikri Vigla, a village right on a beautiful small bay with crystal clear water and consistent wind throughout the summer (4-7 bft), July and August being the most windy months. During the summer the spot fully benefits of the Melthiem winds added to the venturi effect created by the island right in front of the spot (Paros). The wind generally blows side-onshore, and can get a slightly gusty when it turns side shore.
On the downside, the spot is relatively small and can get crowded during the second half of July and August. It also has little night life besides the few bars on the beach.