Dive-site story
Koh Haa forms a cluster of five limestone islets in the Andaman Sea, renowned for dramatic underwater topography including swim-throughs, caverns, and healthy hard coral gardens. The central lagoon offers calm conditions surrounded by shallow reefs, while outer walls descend into deeper water. Famous features like The Cathedral allow divers to explore interconnected chambers where ambient sunlight filters down from the surface.
The Cathedral cavern system featuring massive limestone chambers with light shafts filtering from above
Sheltered central lagoon filled with hard coral bommies and macro life
Dramatic limestone drop-offs covered in purple and yellow soft corals
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 season from mid-October through mid-May.
Marine life
| Species | Likelihood | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hawksbill Sea TurtleEretmochelys imbricata | Common | ||||||||||||
| Banded Sea KraitLaticauda colubrina | Common | ||||||||||||
| Ornate Ghost PipefishSolenostomus paradoxus | Seasonal | ||||||||||||
| Harlequin ShrimpHymenocera picta | Seasonal | ||||||||||||
| Whale SharkRhincodon typus | Rare |
Marine forecast
