Every year toward the end of June (the weekend nearest 21st June), the Miaouleia is organized on Hydra. The three day event is dedicated to the renowned Hydra Admiral, Andreas Miaoulis, for his decisive contribution to the liberation struggle (1821-1827). The events give the island a lively and artistic feel through concerts, music events and a variety of other events that take place.

The undisputed highlight of the weekend is the re-enactment of the historic naval battle of Gerontas. On the Saturday night at 22.00, night becomes day with numerous spectacular fireworks setting the Turkish flagship in the port ablaze, engulfing it in flames.