Thailand’s islands offer different combinations of beaches, diving, walking, food and nightlife. This selection covers fifteen well-known options and explains what each can add to an itinerary. It is a planning guide, not a visitor-number ranking.
Start by choosing the Gulf of Thailand or the Andaman coast, then compare arrival routes and the season. You can build a trip around one base or combine nearby islands without filling every day with transfers.
1. Phuket
Phuket combines beach areas such as Patong with markets, temples, viewpoints and quieter bays. It works as a base if you want a choice of accommodation and transport, and as a departure point for trips towards Phi Phi, the Similans and Phang Nga Bay.
Arrive by air from Bangkok or international routes, by road from the mainland, or by boat from connected islands. Choose the arrival point before arranging your onward transfer.
2. Koh Samui
Chaweng and Lamai have long beaches and a choice of resorts, restaurants and evening venues. Inland, coconut plantations, waterfalls and viewpoints offer a different pace, while fishing villages add another option for exploring.
Samui has its own airport with flights from Bangkok. Ferries also connect from Donsak near Surat Thani. If continuing to Koh Tao, compare the boat departure with your flight or mainland arrival.
3. Koh Phi Phi
Phi Phi Don is the main accommodation base, with a compact village, beaches and nightlife. Phi Phi Leh is protected and includes Maya Bay, where visits depend on conservation rules and access arrangements. Limestone cliffs, bays and boat excursions are central to a stay here.
Ferries connect from Phuket and Krabi, with journeys around two hours as a broad reference depending on service. See the Phi Phi travel guide and our SSI school in Koh Phi Phi for planning diving alongside the visit.
4. Koh Tao
Koh Tao has dive schools, bays, viewpoints and beach life around Sairee. It is an option for learning to dive or organising dives as a certified visitor, with time ashore for walks and sunsets. Conditions and training determine which sites are appropriate.
Ferries connect from Chumphon, the Surat Thani area, Koh Samui and Koh Phangan. Plan the whole connection using how to get to Koh Tao, then compare courses at our Koh Tao diving school.
5. Koh Phangan
The Full Moon Party shapes some travel dates, but the island also has yoga retreats, waterfalls, jungle roads and quieter beaches in the north and east. Pick both the area and the date according to the kind of stay you want.
Ferries connect from the Surat Thani area, including Donsak, and from Koh Samui or Koh Tao. Confirm the service for your date, especially when demand is high around events.
6. Koh Lipe
Near the southern end of Thailand’s Andaman coast and close to Malaysia, Koh Lipe has three main beach areas and a walking street. Beach time and snorkelling are common reasons to visit; late autumn to spring is a broad seasonal reference.
Boats connect from Pak Bara, and a route from Langkawi in Malaysia is another option when operating. Check seasonal availability and border requirements before building an itinerary around that international connection.
7. Koh Lanta
Long beaches and a quieter pace make Koh Lanta an option for a stay focused on the coast and exploring the island. Families also choose it as a base. Decide how you will travel between your accommodation and the places you want to visit.
Boat connections from Krabi or Phuket are options to compare. Check the service and onward transfer for your travel date.
8. Koh Chang
Koh Chang offers jungle, waterfalls and beaches. It suits travellers who want to combine coastal time with walking and inland scenery, rather than spend the entire stay in one beach area.
Travel towards Trat, with bus connections from Bangkok, then take the ferry. Confirm the mainland pier and the transfer to your accommodation.
9. Koh Samet
Koh Samet is a popular beach break from Bangkok. Its compact scale makes it an option for a shorter stay, although weekend demand should be considered when choosing accommodation.
Travel by bus from Bangkok towards Ban Phe, then continue by ferry. Check the departure and arrival piers before booking the connection.
10. Koh Yao Noi
Rice fields, fishing communities and views of limestone formations give Koh Yao Noi a different setting from the larger nightlife centres. Choose it if these landscapes and a slower daily pace fit your trip.
Boat connections from Phuket or Krabi provide access. Match the arrival pier to your accommodation transfer.
11. Koh Yao Yai
Koh Yao Yai is larger than neighbouring Koh Yao Noi. Beaches and a quieter rhythm are its main appeal for travellers looking to spend more time in one place.
Compare boats from Phuket or Krabi and confirm the pier used by your operator.
12. Koh Mak
Koh Mak is a smaller-island option for beach time and a slower itinerary. Check the accommodation location and local transport rather than assuming every part of the island is within walking distance.
Connections from Trat or Koh Chang are routes to investigate for your travel dates. Services can vary with the season.
13. Koh Kut (Koh Kood)
Koh Kut combines beaches, waterfalls and green inland scenery. It suits a trip with time to explore the island rather than a tightly packed sequence of boat transfers.
Check services from Trat or Koh Chang and coordinate the boat with your accommodation.
14. Koh Nang Yuan
Three small islets connected by sandbars make Koh Nang Yuan a familiar excursion from Koh Tao. Visitors come for the scenery and snorkelling; follow the local rules and conditions for access to the water.
Taxi boats from Koh Tao are the usual approach. Confirm the return as well as the outward journey.
15. Similan Islands
The Similans are a protected archipelago associated with diving and boat excursions. Access is seasonal, broadly within October–May, and depends on the park’s official opening arrangements.
Trips depart from the Khao Lak area or Phuket. Check current park access and the precise departure point before booking; the broad seasonal window is not a promise that every date is available.
Choose islands around your kind of trip
For a quieter beach stay, compare Koh Lipe, Koh Mak and Koh Yao Noi. For walking, inland scenery and water activities, consider Koh Chang, Koh Lanta or Koh Tao. If nightlife matters, look at Patong in Phuket, parts of Phi Phi Don and Koh Phangan around its events.
Thailand has two coastlines with different weather patterns: Koh Samui, Koh Phangan and Koh Tao are in the Gulf; Phuket, Phi Phi, Lanta and Lipe are on the Andaman side. Compare the best time to travel to Thailand with your route. Avoid treating calm water or an operating ferry as guaranteed by the month.
Keep the number of islands manageable. Every move needs time for the boat, transfers and check-in; leave flexibility for weather and confirm services before relying on a tight connection.
Add diving in Koh Tao or Koh Phi Phi
DPM Diving has SSI schools in Koh Tao and Koh Phi Phi. Our Open Water course is organised over three days, while an introductory experience takes one day; confirm the programme with the team for your dates and experience.
Use the Thailand diving hub to compare the two schools. Tell us whether you want to try diving, complete a certification or join dives as a certified diver, so the activity fits the rest of your island route.
Frequently asked questions
Which islands are useful bases for learning to dive?
Koh Tao and Koh Phi Phi both have DPM Diving SSI schools. Compare the course, travel connections and your dates before choosing.
Which islands can you reach from Bangkok?
Phuket and Koh Samui have flight connections from Bangkok. Koh Samet is reached via Ban Phe, and Koh Chang via Trat; compare the complete transfer rather than only the boat time.
Are all islands accessible throughout the year?
Do not assume that every boat or excursion operates year-round. Protected areas such as the Similans have seasonal access, and sea conditions can affect other routes.
Do you need to visit both Thai coastlines?
No. Staying on one coastline can reduce transfers. Choose the islands that match your interests and the time available.
