Dive-site story
Koh Haa forms a cluster of five limestone islets rising sharply from the Andaman Sea within the Mu Koh Lanta National Marine Park. Underwater, the karst topography plunges into vertical walls, vast sandy basins, and an extensive system of caverns and swim-throughs. The central lagoon offers shallow coral fields sheltered from open ocean swell, while the outer pinnacles drop toward deeper water where pelagics cruise past.
The Cathedral cavern system with expansive air chambers allowing divers to safely surface inside the rock ceiling
Sheltered central lagoon filled with hard coral formations and macro life
Dramatic limestone swim-throughs and vertical drop-offs covered in soft corals and sea fans
Location
Use the map to plan with your operator and confirm the exact entry point on the day.
Seasonality
The marine national park is officially open during the dry northeast monsoon, with calmest seas and highest water clarity between December and April.
Marine life
| Species | Likelihood | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hawksbill TurtleEretmochelys imbricata | Common | ||||||||||||
| Whale SharkRhincodon typus | Seasonal | ||||||||||||
| Banded Sea KraitLaticauda colubrina | Common | ||||||||||||
| Ornate Ghost PipefishSolenostomus paradoxus | Seasonal | ||||||||||||
| Harlequin ShrimpHymenocera picta | Common |
Marine forecast
