Portuguese underwater caves

Alviela cave

Alviela cave

Almonda cave

Almonda cave

Anços cave

Anços cave

Ansião cave

Ansião cave

Dueça cave

Dueça cave

Pena cave

Pena cave

Olho da Quebrada cave

Olho da Quebrada cave

Olho da Mira cave

Olho da Mira cave

Fonte Grande cave

Fonte grande cave

Unexplored virgin caves

Unexplored caves

A distinctive feature of most Portuguese caves is that they quickly go deep below 100 m which requires a technical cave or cave CCR level of qualification to explore them. We also have underwater caves with shallow depth, sump diving, traverses, and even a Mexican-style cave where at the entrance the sunlight plays with the grass and stones in crystal clear water, making outstanding images and the huge labyrinth is inside. The diversity and difficulty of our caves give a lot of fun for advanced cave divers and a fantastic experience for beginners who want to be more than a touristic cave diver. The temperature of the water in our caves is around 16-18 degrees on a shallow depth, deeper than 150 meters of depth the temperature can drop up to 11 degrees in the wintertime. Someone can think that it is not cold, but it is tricky because, after a certain time, any water becomes very cold. To do any serious dive a diver needs a dry suit and 400 cm2 undergarment, ideally with a heating system. The weather and the condition of our caves are stable for 8 months from March till the middle of October. We dive the rest part of the year as well, catching proper weather, level of the water, strength of the current, and, of course, visibility. This 4-month period of time is good for preparation for the next season of exploration. It is also a good time to do training in the freshwater of a river with a depth of up to 100 meters and explore flooded villages.