Ermioni and Hydra sit close enough together across the Argolic Gulf that the crossing barely gives you time to settle into a seat. It's a short hop rather than a proper sea voyage, and that's exactly its appeal: Ermioni's harbour is a working, unfussy little port on the Peloponnese coast, easy to reach by car and easy to park near, which makes it a favourite back door onto Hydra for anyone who would rather skip the crowds and queues at Piraeus. Sailings run year-round, with the calendar filling out as the operator files each season in stages, so check the schedule box above for the latest confirmed dates before you plan around it.
Through the busier months you'll find a handful of daily departures, thinning out to a single sailing a day once the season quietens. Because the crossing is so brief and sits in fairly sheltered water, it tends to run reliably even when wind disrupts longer routes further out in the Aegean -- though it's still worth keeping an eye on conditions if the meltemi is blowing hard. Hydra's harbour itself is one of the most photogenic in Greece, a horseshoe of stone mansions with no cars allowed beyond the odd donkey and water taxi, so arriving by a short, low-key crossing from Ermioni suits travellers who want the island experience without the ferry-terminal scrum.
Useful Resources for Your Greek Island Trip
- Find accommodation in Greece – hotels, apartments and villas on Booking.com
- Book tours and activities in Greece via Viator
- Find guided experiences and day trips via GetYourGuide
- Compare car hire prices in Greece via DiscoverCars