Cova dos Ratões is situated on the northern side of Berlenga Grande. This site is sheltered from southern winds, providing calmer conditions when other areas are rough. The underwater topography consists of large boulders and canyons. Snorkellers can explore these features, which offer a distinct environment within the Berlengas Archipelago. Access to the site is by boat. Water temperatures range from 15C to 19C throughout the year. Due to the nature of the terrain and conditions, this site is best suited for intermediate snorkellers.

Carreiro dos Cações is a north-facing bay located at Berlenga Grande, featuring a mix of reef and wall topography. The site is suitable for beginners, with depths ranging from 5 to 13 metres and an average of 9 metres. Access is by boat only. Divers can observe common species including wrasses, flatworms, Felimare fontandraui, and Tompot blenny. Less frequently encountered life includes the common octopus, European common cuttlefish, Felimare villafranca, and bream. Rare sightings include gurnard, squat lobster, scorpionfish, barried anemone, tricolor doris, and slipper lobster. Visibility varies between 1 and 10 metres, and water temperatures range from 15C to 19C. Hazards include sea urchins and stonefish.

Gomes VIII is a wreck and reef site located off Berlenga Grande, Portugal. Resting at a depth of 30 metres, the site features a wreck that provides hard relief against strong currents. Divers must be prepared for variable visibility and challenging conditions, requiring advanced buoyancy skills and careful air management. The site is accessible only by boat, and surface support is essential. Species recorded around this area include common octopus, European common cuttlefish, various nudibranchs, wrasses, lobsters, and scorpionfish. Ascidians are found on sheltered surfaces throughout the structure. Due to the depth and current, this site is suitable only for advanced divers.

Praia do Carreiro do Mosteiro is the primary beach on Berlenga Grande, featuring a sheltered sandy entry that leads to a diverse underwater environment of reefs, caves, and walls. The site offers visibility between 10 and 30 metres and depths ranging from 2 to 12 metres, making it suitable for beginners. Snorkellers can observe common species including wrasses, Tompot blenny, and various nudibranchs like Felimare fontandraui. Uncommon sightings include Common Octopus, European Common Cuttlefish, and Bream. The area is protected by granite cliffs, providing a calm environment for exploration. Facilities at the site include parking, toilets, showers, and equipment rental.

Rinchão is a challenging reef and wreck site located north of Berlenga Grande in the Berlengas Archipelago. The site features a steep slope descending to 30 metres, where divers encounter walls adorned with red gorgonia. The remains of the wreck Gomes VIII are also found at this location. Due to its position, the site is subject to strong currents and variable visibility ranging from 6 to 30 metres. Access is strictly by boat, and the site is suited for advanced divers only. Hazards include boat traffic, potential entanglement, and sharp coral. Water temperatures remain cool throughout the year, typically between 15C and 17C.

Pedra da Velha is a dynamic dive site located at Berlenga Grande, featuring a diverse topography that includes reefs, walls, a pinnacle, and artificial reef structures. Divers typically explore depths ranging from 10 to 20 metres, with an average depth of 15 metres. Access to this site is exclusively by boat. Conditions are variable, with visibility ranging from 5 to 15 metres and moderate currents that can become strong. Due to these environmental factors, this site is best suited for intermediate divers. Water temperatures fluctuate between 15C and 18C throughout the year.

Baía da Flandres, located at Berlenga Grande in the Berlengas Archipelago, offers a shallow dive and snorkel experience ranging from 4 to 15 metres. The site features a small wreck and a cavern, accessible only by boat. Divers and snorkellers can encounter common species such as wrasses, flatworms, and Tompot blennies. Less frequently, the site hosts Common octopus, European common cuttlefish, sea stars, and various nudibranchs like Felimare villafranca and Felimare fontandraui. Scorpionfish, squat lobsters, slipper lobsters, and tricolor doris are occasionally recorded. With mild currents and visibility between 10 and 30 metres, this site is suitable for beginners. Water temperatures fluctuate between 15C and 19C throughout the year.

Piscinas, located on the northwest side of Berlenga Grande, is a shallow dive site characterised by a series of underwater canyons. The site is accessible only by boat and requires calm sea conditions with minimal wind. Divers typically explore depths ranging from 5 to 15 metres, with an average depth of 10 metres. At low tide, the area forms natural pools that are suitable for snorkelling. Conditions at this site are variable, with moderate currents and visibility averaging 15 metres. Water temperatures fluctuate between 15C and 19C throughout the year.