Afalatosi is a varied underwater site in Santorini featuring a combination of reef, wall, and cave topography. Reached exclusively by boat, the site ranges from 15 to 30 metres in depth, with an average of 17 metres. Visibility typically spans 15 to 30 metres, assisting navigation along the walls and cave entrances. A mild current is common, though divers should be aware that surge and swell can develop, particularly within the cave sections. Due to the depth range and potential for surge, this site is suited for intermediate divers. Divers should monitor conditions closely and coordinate with local operators, as sea states around Santorini can shift with little warning.

Skaros Wall is a reef and wall dive site located in Santorini, Greece. The site maintains a consistent depth of 10 metres, making it well-suited for beginner divers. Divers access the site exclusively by boat. Conditions are stable with no current and visibility reaching 30 metres, providing a clear environment for buoyancy practice and reef observation. Water temperatures range from 17C in the winter and spring months to 25C during the peak of summer. The site offers a straightforward underwater experience within the Aegean Sea, allowing divers to explore the reef structure at a relaxed pace.

Cape Columbo is a wild, isolated reef site located on the northeast coast of Santorini. The site is geologically distinct due to its proximity to an active underwater volcano, which contributes to geothermal heating of the water. Depths range from 3 to 15 metres. Access is via the shore, though the site is exposed to the open sea and is only recommended for advanced snorkelers on calm days. Conditions are variable, with visibility ranging from 5 to 30 metres and strong currents frequently present. Due to these challenging environmental factors, the site carries a snorkel rating of 2 out of 5.

Alonaki in Santorini offers a varied underwater landscape for intermediate divers, featuring a combination of reef, wall, drop-off, and cave formations. The site ranges from a shallow reef at 5 metres down to a maximum depth of 30 metres, with an average depth of 15 metres. Visibility typically spans 10 to 30 metres. Divers should be aware of surge and swell near the wall and cave entrance, which can push against these features. Sea urchins and sharp coral are present, requiring careful buoyancy control. Both shore and boat entries are available, allowing for flexible access depending on the daily sea state and wind conditions.

Finikia, located off Santorini, Greece, provides a diverse underwater experience featuring a reef, a wall, and a wreck. Accessible only by boat, the site ranges in depth from 7 to 45 metres. Conditions are generally forgiving with mild currents and visibility between 10 and 50 metres. Due to the presence of boat traffic, divers should always use a surface marker buoy and surface close to their vessel. Guided tours are recommended to navigate the site safely and ensure divers remain within appropriate depth limits for their certification level. The site is suitable for beginners, who can explore the shallower sections of the reef and wall.

Nea Kameni is located within the Santorini caldera, providing a diverse underwater landscape that includes reef, wreck, and cave formations. Divers can explore depths ranging from 4 to 30 metres, with an average depth of 20 metres. The site is accessible only by boat, situated 1000 metres from the shore. Conditions typically feature mild currents and visibility between 10 and 30 metres. Due to the presence of overhead environments in the cave and wreck sections, as well as active boat traffic, this site is suited for intermediate divers. Night diving is also available. Water temperatures fluctuate between 17C and 24C, with potential variations near the hot springs of Palea Kameni.

St. Nicholas Islet in Santorini offers a reef environment accessible via a concrete platform entry located past the Oia seafood tavernas. The site features a deep channel leading to the islet, with depths ranging from 3 to 30 metres and an average of 15 metres. Divers and snorkellers can expect visibility between 15 and 30 metres. Conditions include mild currents and water temperatures fluctuating between 17C and 24C throughout the year. Due to the depth and potential for boat traffic, this site is suited for advanced divers. Parking is available near the entry point.

Ammoudi Reef Wreck in Santorini offers a diverse underwater landscape featuring a reef, a wall, and a wreck. The site is suitable for intermediate divers, with depths ranging from 5 to 30 metres and an average depth of 17 metres. Visibility typically spans 15 to 30 metres, allowing for clear observation of the varied topography. Currents are generally mild, though divers should remain aware of boat traffic in the area. Access is possible via both shore and boat, with parking and cafe facilities available nearby. Dives typically last around 45 minutes, with water temperatures fluctuating between 17C and 24C throughout the year.