Lionas Beach on the northeast coast of Naxos is a pebble beach featuring a steep drop-off that descends rapidly from the shore. The site offers depths starting at 6 metres and extending into deeper water, making it suitable for intermediate divers and snorkellers. Conditions vary, with visibility ranging from 10 to 30 metres and mild currents. The water temperature fluctuates between 17C and 24C throughout the year. Due to the steep topography and potential for surf, this site is best suited for experienced individuals comfortable with deep water. Facilities at the beach include a cafe. Divers should be aware of the deep water and potential hazards including surf.

Grotta Beach in Naxos offers a unique snorkelling experience where the remains of a submerged Mycenaean city lie just offshore. Snorkellers can observe ancient wall foundations and building blocks resting in shallow water, typically between 1 and 5 metres deep. The site consists of both natural reef and artificial reef elements. Entry is from the shore, though conditions can vary with moderate currents and occasional surf. Visibility ranges from 5 to 30 metres. Species recorded around this area include Mediterranean moray, great barracuda, common octopus, Turkish wrasse, and various sea bream. Hazards include sea urchins, sharp coral, and surf. Parking is available nearby.

Graviera is a reef and cave site located 1500 metres off the coast of Naxos, Greece. The site features a depth range of 8 to 18 metres, with an average depth of 15 metres. Divers typically experience mild currents and visibility ranging from 10 to 25 metres. Access to this site is by boat only, and it is suitable for beginner divers. Water temperatures fluctuate throughout the year, ranging from 17C in the winter months to 24C during late summer. The topography consists of reef structures and caves, providing a varied underwater environment for exploration.

Graviera/Frouros in Naxos, Greece, offers a diverse underwater experience combining a reef, a wall, and a cave system. Divers can explore this terrain at depths ranging from 12 to 20 metres, with visibility typically between 20 and 30 metres. The site features mild currents, making it suitable for intermediate divers. Access is by boat only, and the site is well-suited for night diving. Maintaining precise buoyancy is essential, as sharp rocks and coral are present throughout the reef and cave sections. Facilities available include air fills, equipment rental, and guided tours.

Kournonisi, located off Naxos, features a combination of reef topography and cavern exploration. The site reaches depths of 40 metres, though shallower sections remain accessible for less experienced divers. Visibility typically ranges between 10 and 30 metres, with minimal current aiding navigation. The cavern provides an overhead environment, requiring careful air management and guide supervision. Divers should be aware of surge and the presence of sharp sea urchins on the reef. Access is exclusively by boat, situated 1000 metres from the shore. Facilities including air fills and boat charters are available through local operators.

Dragonisi, also known as Seal Cave, is an uninhabited islet in the Cyclades featuring extensive sea caves and tunnels. This boat-access site offers depths ranging from 3 to 30 metres with visibility between 25 and 50 metres. The environment is suitable for intermediate snorkelers, though the presence of overhead environments and sea urchins requires caution. Water temperatures fluctuate between 16C and 25C throughout the year, with the swimming season typically beginning in May. The site is a protected nature reserve. Snorkelers can expect to encounter typical Mediterranean reef habitats, which support a variety of regional reef fish and invertebrates.

Marianna is a wreck and artificial reef site located off Naxos, Greece. The site features depths ranging from 5 to 25 metres, with an average depth of 6 metres. Access is strictly by boat. Divers can expect mild currents and visibility typically between 15 and 25 metres. Water temperatures fluctuate throughout the year, ranging from 17C in winter to 23C in late summer. Due to the depth profile, divers should be aware of risks including decompression, nitrogen narcosis, and the hazards associated with deep diving. The site is suitable for intermediate divers and supports night diving. Comprehensive facilities are available, including equipment rental, air fills, and rinse stations.

Agios Prokopios Reef is a shallow, accessible reef located directly off the shore in Naxos, Greece. The site features a rocky shelf that descends to a maximum depth of 6 metres, with an average depth of 3 metres. It is well-suited for beginners and snorkellers due to its mild currents and easy entry. Divers should remain aware of local boat traffic in the area. Species recorded around this area include Great Barracuda, Common Octopus, Mediterranean Moray, Turkish Wrasse, Mediterranean Violet Aeolid, Grey Triggerfish, European Parrotfish, various nudibranchs, and Bream. Facilities including air fills, equipment rental, and a cafe are available nearby.