As the island is not much open to foreign tourism, organized things to do in Kea are limited. Swimming and walking are the only activities available. Most beaches of Kea are non-equipped and offer great chances for private swimming. The most organized beach is Koundouros, but there are also many secluded coves.
Hiking on Kea island is not organized either, but the island provides great chances for walking. Being only a one-hour crossing from Attica, it frequently welcomes hiking groups who walk from the port to the main town and from the Stone Lion to the Monastery of Kastriani or Ancient Karthea.