Ko Raet, Surat Thani

Ko Raet stands apart from Thailand’s more famous islands with its pristine coral reefs and crystal-clear waters that seem almost untouched by mass tourism. This small island paradise offers some of the country’s best snorkeling opportunities, where vibrant marine life thrives in shallow lagoons perfect for both beginners and experienced underwater explorers. The island’s compact size means you can walk its entire coastline in under an hour, yet every corner reveals new perspectives of the surrounding turquoise seas.

Snorkeling around Ko Raet reveals an underwater world teeming with colorful parrotfish, angelfish, and schools of silver snappers darting between healthy coral formations. The island’s beaches provide perfect spots for picnicking under swaying palm trees, while the gentle lapping of waves creates a natural soundtrack to your tropical escape. Rock pools at low tide become natural aquariums where you can observe hermit crabs and small reef fish up close. The western shore offers the best sunset views, where the sky transforms into brilliant oranges and pinks reflected on calm waters. Kayaking around the island’s perimeter lets you discover hidden coves and appreciate the island’s rugged limestone cliffs from sea level.

Tranquility defines the Ko Raet experience, where the only sounds are gentle waves and occasional bird calls from the island’s interior vegetation. Time seems to slow down as you alternate between snorkeling sessions and lazy beach lounging, with warm sand beneath your feet and cooling sea breezes providing natural air conditioning. The absence of commercial development creates an authentic escape where nature takes center stage, making every moment feel like a personal discovery.

Visit Ko Raet during calm weather months when seas are gentle and visibility underwater reaches its peak. Most visitors arrive by longtail boat or as part of island-hopping tours from nearby mainland ports. Pack reef-safe sunscreen, snorkeling gear if you have it, plenty of water, and a waterproof bag for valuables. The island has no facilities, so bring everything you need for your day trip. This pristine marine sanctuary rewards those seeking authentic island beauty away from crowded tourist hotspots.