Koh Haa

A group of small islets ~16km west of Koh Lanta inside Mu Ko Lanta National Park, with a calm central lagoon for training and the 'Cathedral' cavern system; strong on macro and closed mid-May to mid-October.

Depth

5–30m

Current

Mild

Diver level

Open water

Entry

Boat

Unique features

  • 'Cathedral' interconnected caverns
  • Sheltered lagoon; macro and hawksbill turtles

Sources & last checked

Checked July 2026

This is a researched draft, not yet human-verified. The seasonality and logistics are drawn from the sources below — confirm specifics (permits, fees, closures) with an operator before you book.

Note on the data: Coordinates are approximate; not surveyed dive-site GPS.