Ocean Atlas · Europe and Mediterranean
Greece
Clear water, sea caves, wrecks and freediving history across many islands and coasts.

Ethics pass, with care. We found a way to visit this country that meets our animal-welfare standard, as long as we work with the right local operator. Checked by Ocean Calling on 30 Sep 2026. Sources: Collisions of boats with sea turtles continue at Zakynthos National Marine Park, ARCHELON, 2019; The bay of Laganas in Zakynthos is now dangerous to sea turtles (feeding for photos), ARCHELON, 2017; Region of Attica revokes licence of the Attica Zoological Park dolphinarium, Dolphinaria-Free Europe, 2020.
🧭 Travel advice, checked 30 Sep 2026. The UK FCDO travel advice for Greece warns of a high risk of wildfires from April to October and regular strikes, and gives updated advice for Santorini, Anafi, Ios and Amorgos after increased seismic activity. Sources: UK FCDO travel advice, Greece Advice differs by passport: check your own government before you plan.
Why Greece
Greece offers clear Mediterranean water, caves and wrecks across many islands. Amorgos, Folegandros and Antiparos suit freediving and scuba among cliffs and sea caves, while Kalamata and the Athens Riviera are freediving training bases. Kea, Naxos and Kalymnos are known for wrecks, and Nisyros and Milos for volcanic underwater landscapes. Loggerhead turtles may be met around Kefalonia, Zakynthos and Crete, and Alonissos is a quiet protected marine area. June and September are often the best months.
Conservation-led. Ocean Calling guests never chase, touch or bait animals.
When to go
Timing changes a lot from place to place. See each place below.
We have researched this place and keep learning about it. There is no trip here yet.
Can we travel here ethically?
Ethics pass, with care
Good with the right operator. Here is how we choose.
Greece has clear water, caves and wrecks. Turtle spotting boats in Zakynthos can crowd loggerheads, so we do not join these trips. We choose quiet freediving and diving on reefs and walls, and if a turtle passes, we give it space. We do not offer dolphin, whale or monk seal swims.
Checked 30 Sep 2026. Places change, so we look again every year.
Sources for this check
- Collisions of boats with sea turtles continue at Zakynthos National Marine Park, ARCHELON, 2019
- The bay of Laganas in Zakynthos is now dangerous to sea turtles (feeding for photos), ARCHELON, 2017
- Region of Attica revokes licence of the Attica Zoological Park dolphinarium, Dolphinaria-Free Europe, 2020
- Sea turtles in the harbour of Argostoli and the Koutavos Lagoon, Wildlife Sense report, 2021
Where in Greece
Short notes from our research. Wildlife is never guaranteed.
Alonissos
ExploringA quiet protected marine area where scuba divers explore underwater history and Mediterranean reef life.
🤿 In the water: Reef fish, Octopus, Groupers, Moray eels
⛵ From the boat or shore, never in the water: Mediterranean monk seals (rare, never promised), Common dolphins (from the boat), Bottlenose dolphins (from the boat), Striped dolphins (offshore, possible)
When: Jun-Sep. Diving runs June to September. September brings warm water and fewer people.
Amorgos
ExploringClear water, dramatic cliffs and sea caves on the island known for its Big Blue freediving story.
🤿 In the water: Octopus, Moray eels, Reef fish, Turtles and rays (occasional)
When: Jun, Sep. September is the best month, with June second. August can be busy and windy.
Antiparos
ExploringClear Cycladic water with caves and wrecks, good for mixed freediving and scuba.
🤿 In the water: Groupers, Octopus, Moray eels, Nudibranchs
When: May-Oct. The dive season runs May to October. June and September are the best months.
Athens Riviera and Attica
ExploringAn easy-access freediving training base on the Athens coast, open all year.
🤿 In the water: Saronic reef life
When: Year-round. Training is possible all year. May-June and September-October give comfortable water without peak heat.
Corfu
ExploringEasy Ionian scuba with good food and culture, among octopus, groupers and seagrass meadows.
🤿 In the water: Octopus, Moray eels, Groupers, Rays, Posidonia seagrass
When: Year-round. Diving is possible all year. June and September are the best months.
Crete
ExploringMediterranean underwater landscapes and good food, with freediving, scuba and occasional loggerhead turtles.
🤿 In the water: Loggerhead turtles (occasional), Mediterranean reef and macro life
⛵ From the boat or shore, never in the water: Bottlenose dolphins (possible, from the boat), Striped dolphins (offshore, possible), Mediterranean monk seals (rare)
When: May-Oct. The sea season runs May to October. September is warm and drier; June is quieter.
Folegandros
ExploringA quiet Cycladic island with clear water, cliffs and sea caves for freediving and scuba.
🤿 In the water: Octopus, Moray eels, Sea bream, Aegean reef life
When: May-Oct. The season runs May to October. June and September are the best months.
Halkidiki
ExploringEasy shore diving and resort comfort on the mainland, with octopus, groupers and seasonal tuna.
🤿 In the water: Octopus, Groupers, Moray eels, Tuna (seasonal)
When: Year-round. Diving is possible all year. June and September are the best months.
Kalamata and Messinia
ExploringA strong freediving training base, with Mediterranean reef life and Messinian food and culture.
🤿 In the water: Octopus, Moray eels, Groupers, Nudibranchs, Turtles (occasional)
⛵ From the boat or shore, never in the water: Dolphins offshore (possible, from the boat)
When: Jun, Sep. September is the best month, with June second. Peak summer is hot and busy.
Kalymnos
ExploringCaves, walls and wrecks on an island with a long sponge-diving history.
🤿 In the water: Octopus, Sea bream, Nudibranchs, Sponges, Reef fish
When: May-Oct. The main season runs May to October. September to early October is best.
Kea
ExploringHistoric wrecks and underwater history for advanced divers, on a quiet Aegean island.
🤿 In the water: Historic wrecks, Aegean reef life
When: Jun, Sep. June and September are the best months to visit. Kea is known for its wrecks and underwater history rather than for wildlife.
Kefalonia
ExploringIonian wrecks, caves and seagrass, with loggerhead turtles and good food.
🤿 In the water: Loggerhead turtles, Ionian reef life, Posidonia seagrass, Wrecks and caves
When: Year-round. Diving runs all year. June and September are the best months.
Kos
ExploringEasy Dodecanese diving on reefs, caves and volcanic rock, often in very clear water.
🤿 In the water: Octopus, Moray eels, Groupers, Bream
When: May-Oct. Diving runs May to October. June and September are best, with warm water and good visibility.
Milos
ExploringStriking volcanic cliffs, caves and underwater rock formations in the Cyclades.
🤿 In the water: Groupers, Barracuda, Octopus, Volcanic rock formations
When: May-Oct. Diving runs May to October. June and September have warm water and fewer people.
Naxos
ExploringAircraft and ship wrecks, caves and general Aegean diving on a well-served island.
🤿 In the water: Octopus, Moray eels, Groupers, Nudibranchs, Aircraft and ship wrecks
When: May-Oct. Diving runs May to October. June and September are the best months.
Nisyros
ExploringVolcanic reefs with bubbling gas, a fault-line canyon and very clear water.
🤿 In the water: Volcanic bubbling reefs, Fault-line canyon, Aegean reef life
When: Apr-Dec. Diving runs April to December. September and October are best, with fewer people.
Rhodes
ExploringEasy-access mixed scuba and freediving, with Mediterranean reef life and a lot of history.
🤿 In the water: Groupers, Octopus, Moray eels, Barracuda, Rays
When: May-Oct. The main season is May to October. September to early October is best.
Skopelos
ExploringReefs, walls and caves in the Northern Sporades, close to Alonissos.
🤿 In the water: Reef life, Caves and walls
When: Jun, Sep. June and September are the best months.
Zakynthos
ExploringScuba among caves and walls, with loggerhead turtles and a focus on respectful wildlife watching.
🤿 In the water: Loggerhead turtles (occasional, give 15 m), Groupers, Barracuda, Octopus, Caves and walls
When: May-Oct. Diving runs May to October. June and September are best; turtle nesting rules apply.
Rules and fees: In the Zakynthos National Marine Park, official guidelines ask people to stay 15 m from turtles, watch for 10 to 15 minutes at most, never touch or feed them and never approach from the front. Boats may not enter the strictest zone of the nesting bay. We do not sell turtle swims or join turtle spotting boats.
Animals recorded in Greece
Tap an animal to learn how it lives, where it travels and how to meet it respectfully.
Loggerhead turtleCaretta carettaSeen in 89 countries in the AtlasVulnerable
Sperm whalePhyseter macrocephalusSeen in 114 countries in the AtlasVulnerable
Risso's dolphinGrampus griseusSeen in 56 countries in the AtlasLeast Concern
Striped dolphinStenella coeruleoalbaSeen in 43 countries in the AtlasLeast Concern
Lionfish (red and common lionfish)Pterois volitans and Pterois milesSeen in 80 countries in the AtlasLeast Concern
Common octopusOctopus vulgarisSeen in 32 countries in the AtlasLeast Concern
Basking sharkCetorhinus maximusSeen in 23 countries in the AtlasEndangered
Mediterranean monk sealMonachus monachusSeen in 9 countries in the AtlasVulnerable
Cuvier's beaked whaleZiphius cavirostrisSeen in 42 countries in the AtlasLeast Concern
Green turtleChelonia mydasSeen in 103 countries in the AtlasLeast Concern
Moon jellyfishAurelia aurita and other Aurelia speciesSeen in 33 countries in the AtlasNot Evaluated
Noble pen shell (fan mussel)Pinna nobilisSeen in 8 countries in the AtlasCritically Endangered
Mauve stinger jellyfishPelagia noctilucaSeen in 20 countries in the AtlasNot Evaluated
Atlantic bluefin tunaThunnus thynnusSeen in 39 countries in the AtlasLeast Concern
Red coralCorallium rubrumSeen in 6 countries in the AtlasNot Evaluated
Silver-cheeked toadfishLagocephalus sceleratusSeen in 19 countries in the AtlasLeast Concern
White-tailed eagleHaliaeetus albicillaSeen in 38 countries in the AtlasLives on landLeast Concern
Common smooth-houndMustelus mustelusSeen in 35 countries in the AtlasEndangered
Great cormorantPhalacrocorax carboSeen in 90 countries in the AtlasLeast Concern
Northern gannetMorus bassanusSeen in 38 countries in the AtlasLeast Concern
Scopoli's shearwaterCalonectris diomedeaSeen in 37 countries in the AtlasLeast Concern
European shagGulosus aristotelisSeen in 31 countries in the AtlasLeast Concern
Pygmy cormorantMicrocarbo pygmaeusSeen in 26 countries in the AtlasLeast Concern
Small-spotted catshark (lesser spotted dogfish)Scyliorhinus caniculaSeen in 25 countries in the AtlasLeast Concern
Yelkouan shearwaterPuffinus yelkouanSeen in 19 countries in the AtlasVulnerable
Bluntnose sixgill sharkHexanchus griseusSeen in 18 countries in the AtlasNear Threatened
Marbled electric rayTorpedo marmorataSeen in 18 countries in the AtlasVulnerable
Common stingrayDasyatis pastinacaSeen in 13 countries in the AtlasVulnerable
Rough rayRaja radulaSeen in 11 countries in the AtlasEndangeredTell Rocío what you would love to see
There is no trip here yet. If enough people ask, it helps us decide where to go next.
Based in Greece?
We are always happy to hear from exceptional local operators, accommodation, conservation organisations and destination experts in Greece. If your work fits responsible, small-group ocean travel, we would love to learn more.
Partner with Ocean CallingGili Trawangan in 5 days
from CHF 790
