The beach is located directly below the ancient ruins of a Paleo-Christian basilica that dates back to the 5th century AD.
The islet of Kastri, reachable by swimming, features a small chapel dedicated to Saint Nicholas.
The site sits on the former location of Astypalaia, the ancient capital of Kos.
The seabed in the area contains visible remnants of ancient mosaic floors from the nearby basilica ruins.
The beach is frequently exposed to Meltemi winds, which are strong, dry north winds that blow over the Aegean Sea.
Agios Stefanos Beach is located on the island of Kos in the Dodecanese archipelago, situated near the village of Kefalos. The beach is uniquely distinguished by its proximity to the tiny islet of Kastri, which sits directly across the water and is topped by a small blue-and-white chapel. Visitors can swim or wade to the islet to view the ruins of the Basilica of Agios Stefanos, an early Christian site dating back to the 5th century. The coastal area features archaeological remains of the ancient city of Astypalaia integrated into the landscape. The beach surface consists primarily of a mix of sand and pebbles. The water depth is shallow near the shore, making it suitable for families and recreational swimming. The area is susceptible to the 'Meltemi' seasonal winds, which can create waves during the peak summer months. It serves as a popular hub for water sports, particularly windsurfing due to consistent breezes.
From the beach looking toward the islet of Kastri with the blue-and-white chapel in the frame.
Bring water shoes to navigate the transition between sandy areas and rocky sections near the ruins.
If you plan to swim to Kastri islet, ensure you have swimming fins or strong swimming ability due to current fluctuations.
Visit the nearby archaeological remains before heading to the water to understand the historical context of the site.
Do not attempt to swim to Kastri islet if the wind is high or the sea is choppy.
Best visited from late spring through early autumn; no specific seasonal closures for the beach itself.
Respect the archaeological site by refraining from climbing on or removing stones from the ruins; standard beach attire is expected.
