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Koh Si

Koh Si, tucked away in the Similan Islands, often gets overlooked for its flashier neighbours, but we’ve always found it a solid option when you’re after something a bit calmer. It’s mostly shallow, topping out around 12 meters, with wide, flat plateaus on either side of the island. Think big coral patches stretching out, dotted with rocky outcrops. On a good day, when the visibility really picks up, you can get some impressive schools of snapper here, sometimes even a big grouper cruising by. If the wider scene isn't quite as active, we usually poke around the rocks for seahorses, nudibranchs, or a well-camouflaged scorpionfish. It’s a pretty laid-back spot, great for extended bottom times or those days when you just want to take it easy.