Lonely Beach — Haad Son Tong
Tucked into the south-west corner of Koh Phangan below the Nai Wok headland, Lonely Beach lives up to its name. There is no beach road and no strip of bars here, just a small pocket of sand and rock reached down a rough track, which is exactly why it stays so quiet. The crowd is sparse, the pace is slow, and the cove has the relaxed, off-grid feel that more developed beaches on the island have long since lost.
Because it faces west across the Gulf of Thailand, the sun drops straight into the sea here in the evening, so this is a sunset beach rather than a sunrise one. Swimming depends heavily on the tide: at high water in the November-to-April season you can wade out for a dip, while low tide exposes more sand and rock and makes proper swimming awkward. It is a spot for stillness and a sundowner, not for facilities, so bring water and anything else you need.