Berlenga Grande offers a diverse underwater environment featuring reefs, walls, caverns, and wrecks. Located in the Berlengas Archipelago, this site requires boat access and is suitable for experienced divers due to potential strong currents, surf, and overhead environments. Depths range from 5 to 40 metres, with an average of 25 metres. Visibility varies significantly between 6 and 30 metres, and water temperatures remain cool, fluctuating between 15C and 18C throughout the year. Divers should be aware of boat traffic in the area. Facilities including equipment rental, air fills, and boat charters are available to support diving activities at this location.

Primavera is a reef and wreck site located off Berlenga Grande in the Berlengas Archipelago. Divers typically explore depths between 10 and 24 metres, with an average depth of 18 metres. Access is by boat, and the site is suited for intermediate divers due to mild currents and potential surge. Visibility ranges from 10 to 25 metres, and water temperatures fluctuate between 15C and 18C throughout the year. Marine life recorded at this site includes common wrasses, flatworms, Felimare fontandraui, and Tompot blennies. Less frequently, divers may encounter common octopus, European common cuttlefish, Felimare villafranca, bream, gurnards, squat lobsters, slipper lobsters, scorpionfish, tricolor doris, and barried anemones.

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.

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.

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 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.

Gruta Lagosteira is a sea cave located at Berlenga Grande in the Berlengas Archipelago. This site offers a distinct cave environment with depths reaching up to 12 metres. Access is exclusively by boat, and the site is suitable for beginners due to the mild currents. Divers should be prepared for variable visibility and lower light conditions within the cave structure. Water temperatures range from 15C to 19C throughout the year, necessitating the use of a wetsuit. As this is a cave environment, divers must exercise caution, remain within their comfort zone, and avoid contact with the cave walls or any marine life encountered.

Parede do Relaxe is a wall and cave dive site located 1000m from the shore of Berlenga Grande. The site is accessible only by boat and is suitable for beginners. Divers can explore the wall and cave formations at depths ranging from 5m to 13m, with an average depth of 10m. Conditions include mild currents and visibility between 3m and 15m. Water temperatures are chilly, typically ranging from 15C to 19C throughout the year, so a 7mm wetsuit is recommended. A typical dive lasts 45 minutes.