Thailand's Andaman Coast · Island destination
Koh Mook
Koh Mook is an island in the Trang archipelago known for the Emerald Cave sea tunnel, reached by a combo minibus-and-boat route from Trang Airport or, in high season, by direct speedboat from Phuket's Rassada Pier.
Overview
Overview
Koh Mook is an island in the Trang archipelago known for the Emerald Cave sea tunnel, reached by a combo minibus-and-boat route from Trang Airport or, in high season, by direct speedboat from Phuket's Rassada Pier.
The Emerald Cave is open October-May and closed June-September; most speedboat services also shut down May-October, leaving a private longtail as the only crossing option in that window — confirm current seasonal access before booking.
Experience
What it's like
Things to do
- Emerald Cave access — A guided tour boat drops the group at the cave mouth for a life-jacketed swim through the roughly 80-metre tunnel. Kayaking independently from Charlie Beach takes about 30 minutes and requires timing the low tide, since the cave is only accessible then.
Plan your visit
Plan your visit
When to go
The Emerald Cave (Tham Morakot) is open October-May and closed June-September. Most speedboat services also shut down May-October, leaving a private longtail from Khuan Tung Ku or Had Yao pier as the only crossing option in that window.
Getting there & around
Getting there
Flying into Trang Airport and buying a combo minibus-and-boat ticket (around 500 THB) covers the transfer to the pier and the boat crossing. A direct high-season speedboat also runs from Phuket's Rassada Pier.
Your trip
How Koh Mook fits your trip
May suit travelers building a trip around the Emerald Cave sea tunnel, choosing between a guided tour boat or an independent kayak timed to the low tide that opens the cave.
Dates, other stops, and what matters on this trip can make this fit clearer.
Add dates and other stopsInformation used
Information used
Wherely research — Wherely's own governed depth-production research for Koh Mook — drawn from independently-owned travel sources — covering gateway, access, and local-mobility choices, landmark and activity choices, and seasonal timing. Exact fares, schedules, and prices change too often to publish as fixed facts.
Photo credit
Hero photograph: Koh mook hero photograph by Marcin Konsek, licensed under CC BY-SA 4.0.
What to do next
What to do next
Return to Thailand's Andaman Coast when you want the wider geography, or save this Place when it still fits.