Thai island hopping is a rite of passage for travelers. Whether you want to dive in crystal clear water, dance at a full moon party, or find a silent beach where the only sound is the waves, Thailand has an island for you. But you need to know about the seasons. Thailandâs islands are split into two main groups: the Gulf of Thailand and the Andaman Sea. They have opposite monsoon seasons.
The Golden Rule of Timing
- November to April: Andaman Sea (Phuket, Krabi, Koh Lanta, Koh Lipe)
- January to August: Gulf of Thailand (Koh Samui, Koh Phangan, Koh Tao)
If you go to the Andaman Sea in July, expect heavy rain and rough seas. If you go to the Gulf in November, expect the same.
1. The Gulf Trio: Samui, Phangan, Tao
These three islands are close together and easy to hop between via ferry (Lomprayah is the best operator).
- Koh Samui: The âgrown-upâ island. Luxury resorts, an international airport, and great infrastructure. Best for families and luxury travelers.
- Koh Phangan: Famous for the Full Moon Party, but itâs much more than that. The north of the island is a yoga and wellness mecca. Best for hippies, partiers, and digital nomads.
- Koh Tao: The diving capital of the world. More people get their PADI certification here than anywhere else. Best for divers and budget backpackers.
2. The Andaman Gems: Phuket, Phi Phi, Lanta
- Phuket: Massive, busy, and diverse. Some areas are very touristy (Patong), others are peaceful and high-end (Bang Tao). Great for a first landing spot.
- Koh Phi Phi: Famous for Maya Bay (âThe Beachâ). Itâs stunningly beautiful but very crowded and loud at night. Best for young travelers and day-trippers.
- Koh Lanta: Long, flat beaches and a very relaxed vibe. Itâs the most âmellowâ of the popular islands. Best for families, couples, and long-term stays.
3. The âHiddenâ Favorites
- Koh Lipe: Often called the âMaldives of Thailand.â Tiny, walkable, and has the best reefs in the country. Itâs far south, near the Malaysian border.
- Koh Kood: An untouched paradise near Cambodia. No 7-Elevens, no banks, just jungle and pristine beaches. Best for total disconnection.
- Koh Mook: Home to the Emerald Cave (Morakot Cave). You have to swim through an 80-meter dark tunnel to reach a hidden beach inside a collapsed mountain.
Itinerary Ideas (2 Weeks)
The âClassicâ Andaman Route
Phuket (3 days) -> Koh Phi Phi (2 days) -> Koh Lanta (4 days) -> Ao Nang/Krabi (3 days) -> Fly out of Krabi.
The âGulfâ Route
Fly to Koh Samui (3 days) -> Ferry to Koh Phangan (5 days) -> Ferry to Koh Tao (4 days) -> Ferry/Bus back to Bangkok via Chumphon.
Practical Tips for 2026
- Book your ferry tickets online: Used to be easy to just show up, but now the fast ferries fill up days in advance. Use 12Go.asia or direct operator sites.
- Scooter Safety: Everyone rents a scooter ($6/day). If you donât have an international driving permit and a motorcycle license, your insurance is void. The âThai tattooâ (exhaust burn) is common â be careful.
- Plastic Ban: Many islands now have strict bans on single-use plastics. Bring a reusable water bottle.
- Cash is still king: Outside of Samui and Phuket, many small guesthouses and restaurants only take cash. ATMs exist but charge a flat 220 THB (~$6) fee per withdrawal. Withdraw the maximum amount at once.
Comparison: Which Island Costs More?
| Island | Beer (Chang) | Typical Meal | Bungalow |
|---|---|---|---|
| Koh Samui | $3.00 | $8.00 | $50+ |
| Koh Tao | $2.00 | $4.00 | $20+ |
| Koh Lipe | $3.50 | $10.00 | $60+ |
| Koh Phangan | $2.50 | $5.00 | $25+ |
Thai Island Packing List Essentials
You donât need much. Youâll spend 90% of your time in swimwear and flip-flops, but there are a few non-negotiables you must bring from home:
- Waterproof Dry Bag (10L): Essential for long-tail boat rides and kayaking. Keep your phone, camera, and wallet completely dry when waves splash over the side.
- Reef-Safe Sunscreen: Thailand has banned sunscreens containing oxybenzone and octinoxate in all national marine parks. Buy a reef-safe brand before arriving, as they are expensive and hard to find on the islands.
- Slip-on Shoes: You must take off your shoes before entering any temple, home, and many shops or restaurants. Skip the lace-up sneakers and bring slides or easy sandals.
- Light Rain Jacket: Even in the dry season, a sudden 20-minute tropical downpour is common. Donât bring heavy rain gear, just a packable windbreaker.
Island Culture & Etiquette
- Temple Dress Code: If you visit the Big Buddha on Samui or any temple, your shoulders and knees must be covered. A sarong is the easiest thing to carry for this.
- Tipping: Thailand does not have a strong tipping culture. In local restaurants, no tip is expected (though leaving the coin change is polite). In high-end island resorts, a 10% service charge is often already included.
- The Monks: Monks are highly revered. Women must not touch a monk or hand anything directly to him. If you are on a ferry and a monk boards, give up your seat if no others are available.
- Haggling: You can haggle at markets for clothes and souvenirs, but do it with a smile. Never raise your voice. Do not haggle for food or in convenience stores.
Diving & Snorkeling Guide
Thailandâs islands offer some of the most affordable diving certification in the world. Hereâs what you need to know:
- PADI Open Water (Koh Tao): The most popular place on Earth to get certified. Courses run 3â4 days and cost around $250â$350, including all equipment and open water dives. Competition between dive schools keeps prices low and quality high.
- Best snorkeling spots: Koh Lipeâs Sunrise Beach has house reef snorkeling right off the sand â no boat needed. The Similan Islands (day trip from Khao Lak) are the top-rated snorkeling destination in Thailand, with visibility regularly exceeding 30 meters.
- Whale sharks: Koh Tao has seasonal whale shark sightings between March and May. These gentle giants are completely harmless and swimming alongside one is a once-in-a-lifetime experience.
