Casa del Sindaco in Portofino, Italy, offers a varied underwater topography consisting of a wall, canyon, and reef. The site is suitable for advanced divers due to its depth range of 10 to 50 metres and the requirement for boat access. Divers should be aware of boat traffic in the area. Visibility at this location typically ranges between 5 and 15 metres, with water temperatures fluctuating between 14C and 17C throughout the year. As an advanced site, it provides a challenging environment for those experienced in deep diving and navigating complex underwater structures.

San Giorgio is a reef dive located within the Portofino Marine Park, offering depths between 20 and 35 metres. The site is accessed by boat and is characterised by calm, current-free conditions, making it suitable for both beginners and advanced divers depending on the depth. Visibility typically ranges from 10 to 30 metres. Divers can observe common species such as wrasses and bream, alongside less frequent sightings of White-spotted Yellow Nudibranch, Gorgon's Head, Turkish Wrasse, Mediterranean Violet Aeolid, White Seabream, Mauve Stinger, Violescent Sea-whip, Sea Star, Marine Goldfish, Comber, Striped Red Mullet, and Mediterranean Cardinalfish. Water temperatures vary from 14 to 19C, necessitating a thicker wetsuit for deeper dives during spring and autumn.

Punta Vessinaro is a marine dive site located 1000 metres off the coast of Portofino, Italy. The topography consists of a wall, canyon, and reef system reaching depths between 18 and 40 metres, with an average depth of 35 metres. Access is by boat only. The site features patches of Posidonia oceanica and red gorgonian specimens, particularly at depths starting around 30 metres. Divers may encounter moderate currents and visibility ranging from 5 to 15 metres. Water temperatures fluctuate between 14C and 18C throughout the year. Species recorded around this area include wrasses, Mediterranean moray, scorpionfish, and various nudibranchs.

Baia Cannone is a small cove located in Santa Margherita Ligure, offering a rocky seabed and reef environment suitable for beginners. Access is via a steep metal staircase leading from the main road down to the water. The site features depths starting at 3 metres, with visibility typically ranging between 15 and 30 metres. Conditions are generally mild, though snorkelers should be aware of potential surf. Facilities available at the site include changing rooms and showers. The location is well-suited for snorkelling, providing a sheltered environment near the cliffs of the Portofino Marine Park area.

Olivetta Bay in the Portofino Marine Park offers a varied underwater topography featuring rocks, walls, and sandy patches covered in posidonia. Divers enter from the shore at a depth of six metres, with the seabed sloping gradually to a maximum of 25 metres. The site is suited for intermediate divers, with mild currents and visibility ranging between 15 and 30 metres. The walls are characterised by yellow parazoanthus growth. Water temperatures fluctuate throughout the year, ranging from 14C in late winter to 21C in September. Divers should be aware of sea urchins and sharp coral present in the area.

Altare is a marine dive site located 1500 metres off the coast of Portofino, Italy. The site features a complex topography consisting of a reef, wall, drop-off, and pinnacle. Divers typically explore between 10 and 40 metres, with an average depth of 20 metres. Access is by boat only. Conditions vary, with visibility ranging from 5 to 25 metres and moderate currents present. The site is suitable for intermediate divers and supports night diving. Hazards include boat traffic, cold water, decompression, deep water, low visibility, nitrogen narcosis, sharp coral, strong currents, and thermoclines. Water temperatures fluctuate between 14C and 18C throughout the year.

Lighthouse in Portofino, Italy, is a marine dive site with a consistent depth of 13 metres. Conditions at this location vary, with water temperatures ranging from 14C in the winter months to 23C during the summer and early autumn. Species recorded around this area include wrasses, Mediterranean moray, great barracuda, common octopus, and European common cuttlefish. Divers may also encounter various invertebrates such as the cow snail, Mediterranean violet aeolid, banded coral shrimp, and Cratena slug. This site is suitable for divers looking for a shallow, consistent depth profile.

Il Bigo is a wall and reef site located off Portofino, Italy, featuring a depth range of 5 to 40 metres. The site is suitable for intermediate divers who can manage variable visibility and potential currents. Water temperatures fluctuate between 14 and 18 degrees Celsius, necessitating appropriate thermal protection. Access is exclusively by boat. Divers must remain vigilant regarding boat traffic at the surface and are advised to deploy a delayed surface marker buoy from depth. Due to the potential for strong currents and shifting conditions, it is recommended to consult with a local dive operator regarding the deeper sections of the wall before entry.