This dive site, Gruta Azul, is renowned as one of the most captivating cave dives on São Miguel Island in the Azores, Portugal. It offers a unique underwater experience with its 150 metres of intricate stone corridors and three distinct exits, allowing divers to explore fascinating circuits. While no specific historical context is provided, its natural formation provides an adventurous route for experienced divers to navigate through its winding passages.
The marine life within Gruta Azul is diverse and engaging. Divers can frequently encounter large common stingrays (Dasyatis pastinaca) resting on the sandy seafloor or navigating the narrow corridors. The cave walls themselves are adorned with a vibrant array of colourful sponges and various species of small nudibranchs, providing excellent opportunities for macro photography, alongside other typical reef fish.
The best time to visit Gruta Azul for optimal diving conditions is generally during the warmer months, offering clearer waters and more comfortable temperatures. Divers should be certified for cave diving due to the overhead environment and complex layout. The maximum depth of 18 meters and average depth of approximately 9 meters make it accessible for those with appropriate training, though careful buoyancy control is essential within the confined spaces. Freediving is not recommended due to the overhead environment.
