Short boat hops, clear water and easy snorkeling define the Khai Islands off Phuket. This half- or full-day outing pairs quick swims among coral gardens with relaxed beach breaks—ideal for travelers who want big marine payoff without a long ride.
More ways to explore the area's outdoor wonders
You step off the speedboat onto pale sand as the sea sighs around a scattering of rounded rocks—three tiny islands laid out like a row of bright stones between Phuket and Ko Yao Yai. Sun hits the water so clean it reads like glass; behind you, Phuket shrinks to a low line of palms. This is the Khai group: Khai Nok, Khai Nui and Khai Nai, compact islands where coral gardens sit within easy swim from shore and curving rock faces frame the beaches.
Difficulty
easy
Duration
6–10 hours
Fitness Level
Minimal fitness required—basic swimming ability and comfort in saltwater recommended
Wildlife
History
The Khai group sits between Phuket and Ko Yao Yai and has been used historically as fishing spots and informal rest stops for local crews; the islands’ distinctive round shapes have made them recognizable landmarks for generations.
Conservation
Coral in these shallow reefs is sensitive to trampling and sunscreen chemicals—use designated mooring spots, avoid touching reefs, and choose operators that practice low-impact anchoring.
Reserve your spot on the 3 Khai Island Half Day/ Full Day today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Bring reef-safe sunscreen
Use mineral-based, reef-safe sunscreen to protect coral and prevent skin irritation in saltwater.
Wear water shoes
Rocky approaches and shifting cobble mean water shoes will protect feet when landing and exiting the water.
Hydrate and time your trip
Boats return late in the afternoon for full-day trips; bring a refillable bottle and plan for heat mid-day.
Protect marine life
Do not touch or stand on coral, and avoid feeding fish; small actions reduce long-term reef damage.
Mask and snorkel
Essential for seeing coral gardens and reef fish close to shore.
summer
Reef-safe sunscreen
Protects skin and the coral ecosystems—apply before boarding.
summer
Water shoes
Protects feet on rocky landings and slippery docks.
summer
Dry bag
Keeps phone, camera and belongings safe during boat transfers.