Bisti
One of the most beautiful beaches of Hydra. Located in the south side, Bisti is a colorful cove with crystal clear water and great scenery. If you have anchored in the port of Hydar you could consider hiring a water taxi ta take you there and arrange to pick you up once you need to return.
Hydra is with no doubt the most beautiful island of the Saronic. You should definitely visit (and not skip). If you are visiting with a yacht and do not want to get into the trouble of fighting for a birth in the port, then you can consider anchoring to Ermioni, right opposite on the mainland and call a water taxi that will take you to Hydra in seconds. This way you will avoid the risk, anxiety and will focus on the beauty of this magnificent scenery!
-Eugene suggests