Agios Nikolaos is a beautiful, secluded beach located on the southwest side of Hydra island, inside a sheltered cove ringed by cool, shady pine trees. On the beach there are large straw umbrellas and deck chairs with small tables. There is also a small concessions stand where you can purchase drinks and snacks.
The boat that will take you to Agios Nikolaos departs from Hydra port just in front of the clock tower. The trip takes about 30 minutes one way. A sign board posts the departure and return schedules, as well as contact information.