Koh Kra Archipelago

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Highest Coral Diversity in the Gulf

Advanced Peak Season

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

Marine Life

Hawksbill Turtles Green Turtles Blacktip Sharks Manta Rays Staghorn Coral

Notable Features

• 67 hard coral species (highest in Gulf)
• Turtle nesting habitat
• Blacktip sharks common
• Extremely remote
• Liveaboard only

Best Time to Visit

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Peak Good Now

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.