Dive site · access from Hin Daeng & Hin Muang
Koh Ha Lagoon & Cathedral Caverns
A cluster of limestone islets roughly midway between Koh Lanta and Hin Daeng, usually dived on the same day trip or liveaboard.
- Depth
- 5–30m
- Current
- Mild
- Minimum level
- Advanced open water
- Access
- Boat
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The case for it
Why dive here
- Sheltered limestone caverns and a shallow lagoon, often paired with Hin Daeng trips
- Soft corals, leopard sharks on sand, macro life in the chimneys
Check before booking
What may rule it out
- Advanced open water certification is the stated minimum.
Access and timing
Plan this through Hin Daeng & Hin Muang
Best overall months: Feb, Mar, Apr. Check the destination planner for operating season, wildlife and other matching sites.
Wildlife
Seen around Hin Daeng & Hin Muang
rareoccasionalcommonly seenpeak seasondestination closed
These are destination-level records, not confirmed sightings at Koh Ha Lagoon & Cathedral Caverns.
Giant oceanic manta ray
| Month | Likelihood |
|---|---|
| January | occasional |
| February | peak season |
| March | peak season |
| April | peak season |
| May | destination closed |
| June | destination closed |
| July | destination closed |
| August | destination closed |
| September | destination closed |
| October | destination closed |
| November | rare |
| December | occasional |
Reef manta ray
| Month | Likelihood |
|---|---|
| January | occasional |
| February | peak season |
| March | peak season |
| April | peak season |
| May | destination closed |
| June | destination closed |
| July | destination closed |
| August | destination closed |
| September | destination closed |
| October | destination closed |
| November | occasional |
| December | occasional |
Whale shark
| Month | Likelihood |
|---|---|
| January | rare |
| February | occasional |
| March | occasional |
| April | occasional |
| May | destination closed |
| June | destination closed |
| July | destination closed |
| August | destination closed |
| September | destination closed |
| October | destination closed |
| November | rare |
| December | rare |
Grey reef shark
| Month | Likelihood |
|---|---|
| January | commonly seen |
| February | commonly seen |
| March | commonly seen |
| April | commonly seen |
| May | destination closed |
| June | destination closed |
| July | destination closed |
| August | destination closed |
| September | destination closed |
| October | destination closed |
| November | commonly seen |
| December | commonly seen |
Dogtooth Tuna
| Month | Likelihood |
|---|---|
| January | occasional |
| February | occasional |
| March | occasional |
| April | occasional |
| May | destination closed |
| June | destination closed |
| July | destination closed |
| August | destination closed |
| September | destination closed |
| October | destination closed |
| November | occasional |
| December | occasional |
Nearby alternatives
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Sources & last checked
Checked July 2026
Research is source-backed, but conditions and fees should still be confirmed locally.
View 1 source and checking notes
- Hin Daeng & Koh Ha dive sites, Aqua Vision
Note on the data: Coordinates are approximate; not surveyed dive-site GPS.