Con Dao Islands

Con Son · Ba Ria-Vung Tau Province · Vietnam

The Con Dao Islands form one of Southeast Asia's most compelling yet underexplored diving destinations. This remote archipelago of 16 islands lies 185 kilometers off the southern coast of Vietnam in the waters of Ba Ria-Vung Tau Province, far enough from the mainland to have preserved reef systems of exceptional quality. With over 1,380 documented marine species and more than 400 coral varieties, Con Dao ranks among the most biodiverse marine environments in Vietnamese waters. Diving here spans a striking range of underwater landscapes. Shallow reef gardens between 5 and 15 meters showcase dense hard coral coverage, including branching, mushroom, and table formations with an average coral density of 42 percent. Mid-range depths of 15 to 25 meters reveal dramatic walls adorned with gorgonian fans where barracuda, Napoleon wrasse, and schools of snapper patrol. For wreck enthusiasts, sites like Fish Highway feature a steel boat sitting at 28 meters, while Grouper's Grotto offers a fishing trawler resting at 35 meters, both colonized by soft corals and inhabited by resident grouper. What truly sets Con Dao apart is its megafauna. The archipelago is one of the last places in Vietnam where critically endangered dugongs can still be spotted grazing on seagrass beds. Green sea turtles nest on the islands' beaches from May through October, and divers regularly encounter them resting on reef ledges year-round. Stingrays, reef sharks, dolphins, and large schools of barracuda add to the pelagic spectacle. Water temperatures range from 27 to 29 degrees Celsius, and visibility during the optimal November-to-April season frequently exceeds 20 meters, sometimes reaching 30. Currents of one to two knots are typical, rewarding divers with nutrient-rich waters that sustain the islands' remarkable productivity. For those willing to venture beyond Vietnam's mainstream dive circuits, Con Dao delivers a frontier-quality experience with world-class biodiversity.