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.

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.

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.

Ilhéu Maldito is a distinctive site located on the east side of Berlenga Grande in the Berlengas Archipelago. The topography features a combination of reef, wall, and cave systems, including the largest cave in the archipelago. Divers can explore depths ranging from 5 to 20 metres. Access is strictly by boat, and the site is suited for intermediate divers due to the potential for moderate currents and surf. Visibility varies significantly, ranging from 6 to 30 metres. Water temperatures fluctuate between 15C and 19C throughout the year. The site is known for its challenging conditions during inclement weather.

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.

Recife dos Galos is a reef and artificial reef site located off Berlenga Grande. Divers can explore depths ranging from 5 to 22 metres, with an average depth of 20 metres. The site is accessible only by boat and is suited for advanced divers due to moderate to strong currents. Marine life includes common sightings of wrasses, flatworms, and Tompot Blenny. Uncommon species such as Common Octopus, European Common Cuttlefish, Comber, and nudibranchs like Felimare villafranca and Felimare fontandraui are also present. Rarer encounters include gurnard, squat lobster, scorpionfish, slipper lobster, and the tricolor doris. The site features slopes where John Dory are frequently observed sheltering among the algae.

Ilhéu do Soldado is a reef and wall site situated to the northwest of Berlenga Grande. The topography features depths ranging from 5 to 18 metres, with an average depth of 15 metres. Access is strictly by boat, and the site is suitable for beginners. Divers should be aware of potential surf conditions, and the site is best accessed when the sea is calm and winds are low. Visibility typically ranges between 10 and 15 metres, with water temperatures fluctuating between 15C and 19C throughout the year. A typical dive at this location lasts approximately 45 minutes.

Baía do Forte is a reef and cave site located at Berlenga Grande in the Berlengas Archipelago. The site features a reef structure and the Lagosteira cave, which presents an overhead environment for divers. Depths range from 5 to 13 metres, with visibility typically between 10 and 30 metres. Access is by boat. Water temperatures fluctuate between 15C and 19C throughout the year. Due to the presence of sea urchins, caution is advised. The site is suitable for intermediate divers and offers excellent conditions for snorkelling.