Kos has a number of diving outfits, most operating out of Kos Town or nearby. The south of the island offers some good dive sites while in the north many head off for nearby Kalymnos where the limestone cliffs offer particularly rich dive sites and with good marine life and plenty of impressive caves, some splendid wall dives and large interlinked caverns.

Arian Diving Center Kos
The Arian Diving Center was established in 1978 and is based in Kardamena. Courses for beginners and experienced divers. A fully- equipped section for all kinds of scuba diving such as nitrox, trimix, deep diving etc.

Kos Divers
Based at Psalidi and at nearby Kipriotis, Kos Divers was founded in 2003. It is a PADI center with lifeguards training and commercial diving services. They offer beginner dives, boat and shore dives and tuition up to PADI Divemaster.

Sea Spirit Dive Resort Kos
Located at the Grecohotel Kos Imperial Thalasso, the Sea Spirit diving resort caters for all, from child first-timers to certified divers. They have PADI and CMAS instructors.