San Andrés Archipelago dive sites

The Seaflower Biosphere Reserve was designated by UNESCO in 2000 and encompasses the entire San Andrés Archipelago, covering approximately 65,000 square kilometres of Caribbean Sea. It protects the world's third-largest barrier reef system, extensive coral atolls, and the marine biodiversity corridor connecting Central and South American reef systems. The reserve includes core protection zones where fishing and extraction are prohibited, buffer zones with regulated activities, and transition zones supporting sustainable use. The Blue Wall sits within the barrier reef system protected by this designation.

San Andrés offers Caribbean wall and reef diving with warm clear water and excellent visibility, contrasting sharply with Colombia's Pacific destinations like Malpelo and Gorgona which are known for big pelagic encounters in cooler, current-swept water. Compared to Caribbean sites like Capurganá and Islas del Rosario, San Andrés has significantly more developed wall diving with greater depth range and sponge diversity. The barrier reef system is unique to San Andrés within Colombia and provides diving more similar in character to the Cayman Islands or Belize than to mainland Colombian waters.

Advanced Open Water certification is recommended for the Blue Wall as the most interesting sections of the wall extend from 15 to 40 metres. The wall drops vertically, making depth management important. However, Open Water certified divers can enjoy the reef crest and upper wall to 18 metres, which still features excellent coral and sponge growth. Currents are typically moderate and predictable, running along the wall face. Most San Andrés dive operators offer guided dives with thorough briefings on current patterns and depth management for the wall.