Because Santorini is what's left of a collapsed volcanic caldera, its beaches are made of volcanic rock and sand rather than the pale coral sand found elsewhere in the Cyclades. That gives the island three distinct beach colours within a few kilometres of each other, each worth visiting for a different reason.
Black sand: Kamari and Perissa/Perivolos
The island's main beach resorts sit on long stretches of black volcanic sand, backed by the dramatic cliff of Mesa Vouno. Both are well organised with sunbed rows, tavernas and water sports. Note that black sand gets genuinely hot underfoot by midday in summer — sandals are worth carrying even if you plan to swim.
Red Beach, Akrotiri
One of the most photographed beaches on the island, framed by tall red-and-black volcanic cliffs. It's smaller and reached via a short, uneven footpath rather than a road, which keeps it from ever feeling as developed as Kamari — but also means it can feel cramped at midday in peak season. Go early or late for space and softer light.
White Beach
Just around the headland from Red Beach, reachable by small boat from Akrotiri or on foot via a rougher path, White Beach sits beneath pale volcanic cliffs and is noticeably quieter than its red neighbour, with fewer facilities.
Vlychada
A less-visited stretch near the island's marina, known for wind-sculpted white cliffs that look almost lunar. Good for a quieter afternoon away from the main resort beaches.
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