A quick speed-boat hop from Phuket, the Three Khai Islands deliver easy snorkeling over shallow coral gardens, fenced by warm, clear water and quick transfers between three small isles. Ideal for families and first-time snorkelers.
More ways to explore the area's outdoor wonders
The bow rises and the sea opens: in less than 20 minutes a speedboat throws spray across the Andaman and drops you among three small limestone isles — Koh Khai Nok, Koh Khai Nai and Koh Khai Nui. White sand runs into waist-deep shallows; fish thread through coral gardens like commuters through an underwater market. The water seems to dare you to stay dry.
Difficulty
easy
Duration
5 hours
Fitness Level
Suitable for basic swimming ability; minimal fitness required for short swims and beach access.
Wildlife
History
The Khai Islands are uninhabited day-trip isles used historically by local fishermen; they’re now managed informally by tour operators and coastal communities.
Conservation
Coral reefs here are sensitive to boat anchoring and sunscreen chemicals — use mooring areas when provided and reef-safe sunscreen, and avoid touching coral.
Reserve your spot on the 3 Khai Islands Snorkeling Tour by Speed Boat today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Bring reef-safe sunscreen
Sunscreen that’s safe for coral protects you and the reefs — apply ashore and reapply as allowed by crew rules.
Protect valuables
Use a small dry bag or locker on the boat for phones and wallets; waves and wet sand are unforgiving.
Beat the crowds
Book a morning departure to enjoy clearer water and quieter snorkeling sites before larger boats arrive.
Manage sea sickness
If you get seasick, take preventative medication 30–60 minutes before departure and sit mid-boat where movement is least.
Reef-safe sunscreen
Protects skin and avoids harming coral reefs in warm tropical waters.
summer
Water shoes
Helpful on rocky shorelines and for climbing onto smaller boats or sandbars.
summer
Light dry bag
Keeps phone, wallet and spare clothes dry during boat transfers and snorkeling.
Light rashguard
Provides sun protection and reduces chafing from life jackets during long swims.
summer