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Diving Thailand

Koh Ha and Koh Rok

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...Good for: Reef life and health, underwater photography and advanced divers...
...Not so good for: Wrecks, drift dives, snorkelling and non-diving activities...

This Thailand diving region is located in the southern Andaman Sea between the Phi Phi Islands and Hin Daeng - Hin Muang. Mostly, the area is visited by liveaboard cruises. Show more

Dive Site Descriptions

Koh Ha - Undoubtedly, the diving highlight at Koh Ha is the series of fascinating caverns which are located at Koh Ha Yai, the largest of the group of islands. The caverns have large entrances and are safe to enter. You can surface inside and see the ancient stalactites which hang from the cave ceiling. Sunrise is a magical time to dive here as the sunlight creates a gorgeous emerald colour. Show more

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How to Dive Koh Rok - Koh Ha

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Koh Ha and Koh Rok can be visited by some of the Thailand liveaboard safaris on their way to Hin Daeng.


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Diving Season

The dive season for both Koh Rok and Koh Ha is from November and April when the weather is at its best and the seas are usually calm. Visibility can reach 30m and the water temperature reaches 29-30°C from February through to April.

The other months of the year are under the influence of strong winds blowing in from the Indian Ocean, bringing rain and waves, which negatively impacts the diving experience. Visibility sometimes drops to 5-10m and the sea cools a little to 27-28°C. The islands are nowadays officially closed during this time of year.

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Where are Koh Ha and Koh Rok and How Do I Get There?

Review our map below of Thailand. Here, you will find information on how to get to Phuket or Phi Phi Island, and then on to Koh Ha-Koh Rok.

Map of Thailand (click to enlarge in a new window)

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Reef Summary

Depth: 5 - 20m
Visibility: 10 - 30m
Currents: Gentle
Surface conditions: Can be choppy
Water temperature: 27 - 30°C
Experience level: Beginner - intermediate
Number of dive sites: 6
Distance: ~80-110 km southeast of Phuket (4-6 hours), 35-65 km southeast of Phi Phi (1-2 hours)
Recommended length of stay: 2 days

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Useful References


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