From Piraeus port daily with Flying Dolphins and Flying Cats, duration 1 hour and 30 minutes.
By Flying Dolphin (Hellenic Seaways) Tel. 2104199000
By car you can come through the National Road Athens - Corinth, Epidaurus and then follow the signs to Hydra, Poros, Spetses to Galata and then to Metochi. From there in 15 minutes you arrive on Hydra island.