Khai Islands: Phuket Half-Day Trip Guide and Tips

The Khai Islands are a cluster of three small islets off Phuket's east coast, about 15 to 25 minutes by speedboat, and they are the shortest organised island outing you can book from the island. A standard half-day tour lands on Khai Nai and Khai Nok, adds a snorkelling stop at Khai Nui, and has you back at your hotel by lunchtime or early evening. There is no scheduled public ferry, so almost every visitor arrives on a shared tour or a private charter.

The name means "egg islands" in Thai, a nod to their rounded shape. Although they are sold almost entirely from Phuket, they sit in Phang Nga province: Thailand's Department of Tourism places Ko Khai Nok between Phuket and Koh Yao Yai, and the local Phru Nai administration lists it under Ko Yao district. That address explains why some listings put the islands in Phang Nga Bay rather than off Phuket.

How do you get to the Khai Islands from Phuket?

Book a tour. Operators run speedboats from east-coast bases such as Royal Phuket Marina, Phuket Boat Lagoon, private piers around Rassada and, for some routes, Ao Po. A few also leave from Chalong. The straight-line distance from Rassada is roughly 11 to 15 kilometres, so the crossing is short even when the sea is lumpy.

Check the exact meeting point before you pay. Booking pages often name the tour company rather than the pier, and a hotel pickup that is free from Patong or Kathu can carry a supplement from Rawai, Nai Harn or the airport area. If you are landing the same morning, read our Phuket airport transfer guide and save the boat for a later day. Travellers staying on Koh Yao Yai can also charter a boat from that island; the crossing takes about half an hour.

Khai Nai, Khai Nok and Khai Nui: what is the difference?

The three islands play different roles, and a "three islands" label does not mean three beach landings.

• Khai Nai is usually the first landing. It has a strip of white sand, shallow water, simple bars, paid chairs and a well-known population of beach cats.
• Khai Nok is the other beach stop and often the last of the day. It has the same mix of chairs, drinks stalls and water sports, and boats often crowd the main landing.
• Khai Nui is a rocky snorkelling stop. Boats normally let you swim from the deck rather than land, and crews skip it when wind or visibility is poor. Its coral has suffered more damage than the reefs at the other two islands.

None of them has hotels or fresh water for visitors. Bring cash in small notes for drinks, chairs and toilets, which are basic and usually charged per use.

How much does a Khai Islands tour cost?

Prices are set by operators, not by any official tariff. Shared half-day speedboat tours reviewed by Phuket travel sites this year are mostly listed at around 950 to 1,200 baht per adult, with lower child fares. That usually covers the boat, life jacket, mask and snorkel, a guide, basic insurance and drinking water. Lunch is not always included on the half-day version.

Private speedboat charters cost several thousand baht and more, depending on boat size and hours. Compare options this way:

Option	Typical time	Best for
Shared half-day tour	About 4 to 5 hours with transfers	First-timers, families, short stays
Phi Phi plus Khai combo	Full day	Visitors whose main goal is Phi Phi
Private charter	Flexible	Groups who want to dodge the busiest hours

Many full-day Phi Phi trips add Khai Nok as a final swim on the way back. If the Khai Islands are your main interest, a dedicated half-day tour gives you far more time on the sand. For the bigger trip, see our guide to the Phuket to Phi Phi ferry.

Because the group is not a national park, there is no Department of National Parks entry fee of the kind charged at Phi Phi or the Similans. A handful of operators still list a small island charge as an extra, so ask what is excluded before you pay. You will also be asked for your full name and passport number in advance, which operators pass on for passenger and insurance records.

When is the best time to go?

The drier months from November to April bring the most reliable sea conditions and clearer water, which is why tour numbers climb from now on. A short crossing is not always a smooth one, though: speedboats can still bang over chop, so check the forecast in our Phuket weather in November guide and skip the trip if a strong-wind warning is in force.

Time of day matters more than the month. The beaches are tiny, and when several boats arrive together the shoreline fills up quickly. Morning departures, typically leaving between about 9:30 am and 10:00 am, give you the best chance of calm water and space before the afternoon wave and the returning Phi Phi boats pass through.

Is snorkelling good, and is it safe to swim?

For beginners it can be rewarding. Fish gather in the shallows close to shore, and you can see them without swimming far. Do not expect pristine coral, though: years of heavy visitor traffic have left parts of the reef broken, and visibility changes with tide and wind.

Swim only inside the area your guide points out and keep clear of boat lanes. Jet-skis are rented on the islands, and Phuket officials announced a fresh jet-ski crackdown this month after a string of incidents, including a September collision off Naka Island that seriously injured two tourists. If you hire one anyway, agree the price, the time and the damage terms in writing first; our Phuket tourist scams guide explains why.

Wear water shoes for rocks, broken coral and sea urchins, but never stand on living coral. Do not feed the fish or the cats; feeding changes animal behaviour and leaves food waste in a very small space.

Khai Islands or Coral Island: which should you choose?

Both are short, family-friendly hops with no national park fee. Pick the Khai Islands if you want the shortest crossing from the east coast and a quick multi-stop half day. Pick Coral Island if you are staying in the south near Rawai or Chalong and want larger beaches with more room. If clear water is the priority and you have a full day, Koh Racha Yai is the stronger snorkelling choice, at the cost of a longer ride.

FAQ

Can you visit the Khai Islands without a tour?

There is no regular public ferry. Independent visitors can hire a private speedboat or longtail, but they still need to agree the route, landing spots and return time with the boat operator.

Can you stay overnight on the Khai Islands?

No. There is no tourist accommodation, power or fresh water for visitors, so the islands are a day-trip destination only. Neighbouring Koh Yao Yai, about half an hour away by boat, has hotels if you want to stay nearby.

Are the Khai Islands suitable for young children?

Usually, yes. The crossing is short and the water near the beaches is shallow. Keep children inside the marked swimming zone, use life jackets on the boat, and note that most operators exclude pregnant travellers and people with serious back or heart conditions from speedboat trips.

Do tours run in the rainy season?

Many tours operate all year, but wind and waves can shorten the route. Khai Nui is the stop most often dropped when conditions are rough.

Photo: Khai Nok island, by Diego Delso, via Wikimedia Commons (CC BY-SA 3.0).