The Best Dive Sites in Semporna & Sabah

People plan a Semporna trip for one island and come home raving about four. After a decade of guiding here, my honest pitch is this: Sipadan is the headline, but the week is a portfolio. Oceanic walls one day, world-class muck the next, a drowned volcano rim after that.
Table of Contents
- Sipadan: the wall dives
- Mabul: the macro capital
- Kapalai: the sandbar reef
- Si Amil and the outer islands
- How the pros pick the day's sites
Sipadan: the wall dives
Barracuda Point is the marquee name for the vortex, the sharks and the sheer fish volume. South Point is the deep-current site where the big odd things happen; it's where I look hardest into the blue. Turtle Cavern is a haunting cathedral of a cave, guided and trained divers only. West Ridge and The Drop Off deliver the vertigo of a 600-metre wall beginning a few fin-kicks from the beach. Around a dozen recognised sites ring the island, and the comparison table with depths and levels lives on our dive site maps page.
Mabul: the macro capital
Everything Sipadan is, Mabul isn't. That's the compliment. Shallow, sandy, current-light and absurdly rich in small life: frogfish in every sponge colour, pygmy seahorses, blue-ringed and mimic octopus, mandarin fish at dusk. Sites like Lobster Wall, Froggy Lair and Paradise reward slow diving and sharp-eyed guides. It's also where most Sipadan divers sleep, which makes it the easiest second act in diving. Twenty-five minutes by boat from your breakfast table, roughly.
Kapalai: the sandbar reef
Kapalai isn't an island so much as a reef with a resort standing on stilts over it. The Jetty and Mid Reef are easy, shallow dives over coral bommies and artificial-reef structures thick with juvenile fish, and the dusk mandarin-fish show is one of the region's most dependable. Snorkelers get real value here too; the house-reef flats work brilliantly with just a mask. The resort side of the story is on our Kapalai page.
Si Amil and the outer islands
When weather and schedules line up, the outer islands add wilder, less-dived reefs. Si Amil's slopes produce rare critters with nobody else on the site, and Mataking's house reef and channel dives serve turtles, rays and the occasional passing pelagic. These trips don't run every day. Ask your dive centre early in the week, not on the last morning, and thank me later.
How the pros pick the day's sites?
Good operators don't run a fixed circuit; they read the day. Tide state decides which walls will carry current, and therefore fish. Wind direction decides which side of an island is comfortable. Group experience decides how much current is welcome in the first place. The same site can be a gentle drift on Tuesday and a fish-storm on Thursday, which is why flexibility is the most valuable thing a diver packs. Tell your dive centre what you most want to see and let them choose the when. It's the single best tip I can give you.
Ready to build the week? Compare resorts and packages, or send us your wish-list and we'll match the sites to it.