BOAT-COMPARATOR Guide

Santorini: sailing and anchoring in the volcanic caldera

Sheer cliffs, very deep water, an active volcanic islet: why sailing at Santorini bears no resemblance to a typical Cyclades anchorage.

Seen from the sea, Santorini is not an island like the others: it's the half-submerged rim of a volcanic caldera, formed by a major eruption in antiquity that caused the island's centre to collapse in on itself, leaving behind this unique bay.

A caldera, not a bay

The cliffs of Fira and Oia drop straight into water hundreds of metres deep just a short distance from shore — an underwater profile that makes anchoring on a hook impossible across most of the caldera.

Where boats actually moor

Boats favour small harbours such as Ammoudi, at the foot of Oia, or the Athinios area, staying alert to the heavy traffic of ferries and cruise ships manoeuvring in the same tight space.

Nea Kameni, the still-active volcano

At the centre of the caldera, the islet of Nea Kameni remains volcanically active, with fumaroles visitors can walk to from a landing point, and the reputedly warm thermal waters of Palea Kameni right next door — a classic stop on any boat trip out of Santorini.

Working around the meltemi

As across the rest of the Cyclades, the meltemi blows hard in July-August and can make the water around the caldera uncomfortable by late afternoon — see our Mediterranean winds guide before setting a plan.

A different way to arrive

Many visitors reach Oia by road, then walk down to the small harbour of Ammoudi via steps cut into the cliff: arriving straight from the sea flips that view around, letting you climb back up toward the village at sunset instead of descending in the full heat of the day. Compare offers on the Santorini listing page on Boat-Comparator.

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