Koh Ngai Travel Guide

Koh Ngai's main beach runs for a couple of kilometers down the east coast, fine, almost white sand backed by jungle hills and shaded by casuarina trees in the north and umbrella trees in the south. The view is the reason people come, across clear green water to the karst islets of Koh Ma and Koh Chueak, Koh Mook's cliffs and the mountains of the mainland. Every resort but two sits along it, and you can walk from one end to the other in about half an hour at low tide.

The tide changes the beach completely. The southern half is wider, with most of the resorts and the best swimming, and the far south end, around Thanya, keeps deep enough water at low tide. The northern stretch is narrow, and at high tide the sea comes right up to the seawalls, so a walk south means wading. At low tide the water drains out a long way over sand and dead coral, which is good for a walk and for spotting crabs and hornbills, but not for a swim. Check the tide times at your resort and plan the day around them.

Paradise Beach, Ao Kuan Tong on Thai maps, is a crescent of sand on the south coast with a coconut grove behind it and a single resort, and it's the island's one walk. The trail starts behind the last villas at the back of Thanya Beach Resort, at the south end of the main beach, and climbs over the hill through thick jungle for 20 to 30 minutes, steep in places, before dropping into the grove. It's signposted. A side trail on the way branches off to Ao Mamuang, another small beach. Wear proper shoes and carry water.

Paradise Beach is quieter than the main beach and its reef is in better shape, so bring your mask. Day visitors can eat and drink at the resort's beach restaurant. From the west end of the beach, the trail carries on uphill for about another 30 minutes to a viewpoint on the island's southwest corner, with a view out over the Andaman Sea. You can also reach Paradise Beach by kayak, round the southern tip past the pier, though it's a long paddle.

A fringing reef runs along most of the east and south coasts, so you can snorkel straight from your resort. From the main beach you swim out over 20 to 40 m of flat sand before the reef begins, about 50 to 100 m from the shore. The coral is mostly hard coral, staghorn, table and fire coral, much of it dead or damaged, so don't come expecting color. The fish make up for it, parrotfish, butterflyfish, rabbitfish, bannerfish and clownfish, and lucky snorkelers see a small reef shark, a turtle or a banded sea krait.

The best stretches are in front of Thanya and Kaimuk Thong, and the reef off Coco Cottage and Thapwarin is good too. Paradise Beach has the least damaged reef on the island. Most resorts rent snorkel sets for about ฿200 a day and lend or rent kayaks, and a 15 to 20-minute paddle takes you to the rocks of Koh Ma, with more reef and a colony of flying foxes. Longtail snorkeling trips start at about ฿600, to Koh Chueak, Koh Waen and Koh Ma, the Emerald Cave on Koh Mook and the south end of Koh Kradan. For the clearest water, Koh Rok is about 15 km west, about ฿4,000 for a longtail for the day.

Koh Ngai is an island for doing very little. The days are a swim, a snorkel, a walk along the beach at low tide, a massage at one of the open-air salas on the sand and a drink at sunset. Oriental pied hornbills, black and white with a big yellow casque, live in the trees behind the beach, and you'll often see them from your terrace without going looking. Monitor lizards wander the paths, and guests now and then report a dugong grazing off the beach.

For something more active, take a kayak round the coast to the coves on the south and west sides, or out to Koh Ma, hike to Paradise Beach and the viewpoint, or book a longtail day to the Emerald Cave and Koh Kradan. Some resorts have paddleboards, and a few run dive trips. There's no nightlife beyond a couple of beach bars, which is exactly why most people choose it.

Almost every meal on Koh Ngai comes from a resort kitchen, and you can eat at any of them. Expect about ฿100 for fried rice, ฿120 to ฿200 for a curry or stir-fry and ฿300 or more for seafood and Western dishes, roughly double the mainland, and a large bottle of water costs about ฿50. Coco Cottage has the best Thai cooking on the island, Kaimuk Thong's restaurant and Sea Taste, one of the few independent places, are good value, and several resorts light seafood barbecues in the evening.

Nights are quiet. Ahana and BMH are the beach bars, and Light My Fire at the north end has live music and a barbecue most nights. If you want a choice of restaurants and some nightlife, stay on Koh Lanta and visit on a day trip, or split your nights with Koh Mook, which has a village and cheaper food. Bring snacks from Lanta or Trang, because the only shop is a small minimart at Fantasy.

From Koh Lanta, the island-hopping speedboats that run south to Koh Lipe from mid-October to about 20 May make Koh Ngai their first stop. Bundhaya leaves Saladan pier at 10:30 and reaches the island at about 11:00, and Satun Pakbara leaves around the same time and takes about 40 minutes. It's the easiest way in, and many people add a few nights here to a Lanta trip.

From the mainland, most boats leave Pak Meng pier on the Trang coast, about an hour's drive from Trang town or the airport. King Travel's ferry leaves at 09:00 and takes about an hour, and Satun Pakbara's speedboats at 09:30 and 14:30 take about 20 minutes. Van-and-boat tickets on 12Go collect you from Trang's town, station or airport. To reach Trang from Bangkok, fly from Don Mueang, about 1 hour 30, or take the overnight Express No. 83, which leaves Krung Thep Aphiwat at 18:50 and reaches Trang a little after 08:00, in time for the morning boats.

Leaving can take longer than arriving, because the speedboats back to the mainland or on to Lipe often call at Koh Mook and Koh Kradan first, so don't book a tight flight connection on the same day. The speedboats tie up at the pier or anchor offshore, and a longtail carries you on to your resort, often with a wade at the end, so pack light, in a bag you can carry.

If you're staying on Koh Lanta, the 4 Islands day trip is how most people first see Koh Ngai. The boats leave Lanta in the morning, snorkel at Koh Chueak or Koh Ma, swim through the Emerald Cave on Koh Mook and stop for a beach lunch on Koh Ngai, and one option finishes on Koh Kradan. You get an hour or so on the beach in the busiest part of the day, enough to decide whether to come back and stay.

The three Trang islands most people choose between are 15 to 30 minutes apart by longtail, so you can see all of them from any one. Koh Ngai has the most comfortable resorts, reef straight off the beach and the shortest boat from Lanta. Koh Kradan has the best beach and even less to do, and the reef off its main beach has been closed to snorkelers since the 2024 coral bleaching. Koh Mook has a fishing village, cheap guesthouses, places to eat and the Emerald Cave.

Choose Koh Ngai for an easy, comfortable add-on to a Lanta trip, Kradan for the beach, and Mook for a lower budget and a little life. With five or six nights, split them between Ngai and Mook, and take a longtail to Kradan for the day.

December to April is the dry season, with calm seas, clear water and sunshine, and January and February are the busiest months, when the best rooms sell out early. November is the shoulder, when the rains are tailing off and the speedboats have started. The island-hopping boats from Lanta and Lipe run from mid-October to about 20 May.

May to October is the southwest monsoon. The sea gets rough, the island-hopping boats stop, and several resorts close while the rest run with fewer rooms and staff. If you come in the rains, check that your resort is open and how it will get you there before you book, and expect a private longtail from Pak Meng rather than a scheduled boat. Christmas and New Year carry the highest prices of the year.

Koh Ngai's reef is worn by years of boats and bleaching. Don't stand on coral at low tide, wear water shoes over the shallows, and use a reef-safe sunscreen or a rash vest. Give the hornbills space and don't feed the wildlife. Everything on the island arrives by boat and the rubbish has to leave the same way, so take your plastic back with you.