29/08/2026
Visibility in Cretan water regularly exceeds 30 metres, and there is a reason for it: the island has no large rivers, so almost no sediment reaches the sea. Add a rocky seabed and high salinity and you get water that is clear, buoyant and usually calm in the bays.
Set your expectations honestly first. This is not a coral reef. What you get is rock, crevices and posidonia seagrass meadows, which shelter octopus, wrasse, parrotfish, moray eels and the occasional loggerhead turtle. It rewards looking rather than gawping.
May to October is the season. Water is around 20 degrees in May, up to 27 in August. June and September are the sweet spot: warm enough, very clear, and without the peak crowds.
Five easy places to get in, all shallow and sheltered: Elafonissi, Balos, Almyrida, Voulisma and Ammoudara. Three worth going out of your way for: Matala, where you swim over the submerged remains of a Roman port; Elounda, for the sunken city of Olous just off the shore; and Skinaria on the south coast, which is the clarity champion.
Where to look: octopus sit between 0 and 5 metres, usually under rocks and camouflaged; wrasse and parrotfish between 1 and 5; loggerhead turtles anywhere from 1 to 10; moray eels between 2 and 8, in crevices. Three rules go with that. Stay five metres back from turtles, they are protected. Never put your hand into a hole. And wear something on your feet, because sea urchins are the actual hazard here.
Gear rents for 10 to 15 euro a day. A half-day guided boat trip runs 50 to 80 euro per person with everything included.
Before you get in: never snorkel alone, check the sea forecast, and know that the coast guard emergency number is 108. Conditions on the south coast can change fast.
The best trick nobody mentions: when the north coast is blown out, the south is usually calm. The island is wide enough to drive away from the weather, which is the real argument for having a car.
Save the eight spots, and send this to whoever you are swimming with.