Koh Kra Archipelago
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Highest Coral Diversity in the Gulf
An extremely remote archipelago 54km offshore with 67 species of hard coral — the highest diversity in the entire Gulf of Thailand. Liveaboard access only.
Depth Range
5–30m
Site Type
island reef
Remote South (Koh Kra & Koh Losin)
Visibility
10–25m
28–30°C
Getting There
9-10 hr sail from Khanom
~54 km offshore Nakhon Si Thammarat
10 Oct
11 Oct
12 Oct
13 Oct
14 Oct
15 Oct
16 Oct
Marine Life
Notable Features
- • 67 hard coral species (highest in Gulf)
- • Turtle nesting habitat
- • Blacktip sharks common
- • Extremely remote
- • Liveaboard only
Best Time to Visit
About Koh Kra Archipelago
Mu Koh Kra (Ko Kra Yai, Ko Kra Klang, Ko Kra Lek) is one of the most pristine dive destinations in the Gulf of Thailand, with 67 species of hard coral documented — the highest diversity in Gulf waters. The islands cover 374 hectares including 66 hectares of coral reef. Critically endangered hawksbill turtles and endangered green turtles use the islands for nesting. Blacktip reef sharks are common, and manta rays have been documented. Extremely few divers ever visit — the 77 nautical mile journey from Khanom takes 9-10 hours by sailing vessel.
Tips
Liveaboard only. Plan well in advance — very few operators service this area.
Experience Required
Advanced. Remote location, long boat trip, currents.
Location
GPS: 8.4170°N, 100.7500°E
Learn to Freedive in the Gulf of Thailand
Sites like Koh Kra Archipelago are what the Gulf has to offer. Get certified with us on Koh Samui — train at Sail Rock and Koh Tao in groups of no more than 3, skip the Koh Tao ferry, and dive the best of the region.
New to freediving? Get the free beginner's guide first.