Thailand has two coasts on opposite weather calendars and dozens of islands ranging from party hubs to barefoot hideaways — which is exactly why selling the wrong one in the wrong season is the most common beach-holiday mistake. As your Thailand DMC, our job is to match the island to the client and the coast to the calendar. Here is the map.

The one rule: Andaman versus Gulf

Thailand's two coasts are on opposite monsoon calendars, and this single fact governs every beach booking:

Andaman coast (west) — Phuket, Krabi, Phi Phi, Khao Lak, Koh Lanta, the Similans. Best November–April; green season May–October trades some sun for the year's best rates.
Gulf coast (east) — Koh Samui, Koh Phangan, Koh Tao. Driest January–August; wettest October–November.

The practical payoff: when European summer clients want July sun and the Andaman is wet, you send them to Samui. Routing by coast doubles your saleable beach season. More on this in our complete Thailand DMC guide.

Which island for which client

Phuket — the all-rounder: every hotel category, an airport, nightlife, and a launchpad for island hopping. Right for first-timers, families and those who want choice.
Krabi (Ao Nang & Railay) — dramatic limestone karsts, rock climbing, quieter than Phuket. Great for couples and active travellers.
Koh Phi Phi — the postcard: Maya Bay and Pileh Lagoon. Best as an early-departure day trip or a short stay for younger clients.
Koh Samui — pool villas at prices the Andaman can't match, plus the Gulf calendar. The honeymoon and European-summer answer.
Koh Phangan — the Full Moon Party for the young; serene wellness retreats on the north coast for everyone else.
Koh Tao — Southeast Asia's dive-certification capital.
Koh Lipe & Koh Lanta — barefoot, slower, for repeat visitors who've "done" Phuket.
Koh Chang & the east — accessible from Bangkok, family-friendly, off the mass-tourism radar.

The signature day experiences

Beach holidays live or die on the day trips. We operate the classics — Phi Phi and Maya Bay, Phang Nga Bay sea canoeing, the Similan Islands (mid-October to mid-May only; the park closes in green season), and Ang Thong Marine Park from Samui — with our own and contracted boats, so departure times beat the crowds. We also run official-partner signature days like Yona Beach Club, the world's first floating beach club off Phuket, and Hype Boat Club, a luxury catamaran day party.

How a DMC protects the beach holiday

Sequencing — we never stack two boat days back-to-back; salt, sun and swell are cumulative and day three becomes a complaint.
Transfers — pier-to-resort logistics with luggage handled end to end, via our own boats and fleet.
Villas and resorts — contracted net-rate accommodation and private villas matched to the client.
Weather contingency — when a sea day blows out, we re-route to a sheltered bay or a land day in real time.

FAQ

When is the best time to visit Thailand's beaches? The Andaman coast (Phuket, Krabi) is best November–April; the Gulf coast (Koh Samui, Phangan, Tao) is driest January–August. Because the two coasts are on opposite monsoon calendars, there is almost always a dry beach in Thailand.

Which Thai island is best for families? Phuket for choice and infrastructure, Koh Samui for calm Gulf beaches and pool villas, and Koh Chang for an accessible, low-key family base near Bangkok.

Which island is best for a honeymoon? Koh Samui leads for pool-villa privacy and the Gulf calendar, with Krabi and the quieter Andaman islands close behind for couples who want drama and seclusion.

Can you visit the Similan Islands year-round? No — the Similan Islands national park is open roughly mid-October to mid-May and closes during green season. Never promise the Similans in the monsoon months.

Can a DMC package multi-island itineraries? Yes — we route multi-island and multi-coast programs with all transfers, boats and accommodation under one quotation, sequenced so sea days and land days alternate.

Building a beach itinerary? Send the trade desk your dates and client profile.