Italy Diving and Snorkeling 2026: The Underwater Sites Worth Getting Wet For

Autore: La Redazione di www.tourleaderpro.com

Last updated: April 2026.

Italy has the third-longest coastline in the Mediterranean (after Greece and Turkey) and a range of underwater environments that reflects the country's geological diversity above the waterline: the granitic submarine walls of Sardinia's La Maddalena Archipelago; the volcanic rock formations of the Aeolian Islands; the Posidonia oceanica seagrass meadows of the Ligurian and Tyrrhenian coasts; the kelp forests of the northern Adriatic; and the spectacular visibility of the southern Mediterranean waters around Lampedusa and Pantelleria. For divers and snorkelers, Italy offers a range of sites from beginner-accessible (the Portofino MPA, where 3-meter visibility at 2 meters depth shows anemones, wrasse, and grouper to swimmers in basic snorkeling gear) to technically demanding (the Ustica wrecks, the deep walls of the Tremiti Islands).

Italy's Best Diving and Snorkeling Sites

Portofino Marine Protected Area (Liguria)

The Portofino MPA on the Ligurian coast east of Genova is one of the most accessible and most rewarding snorkeling and beginner diving sites in northern Italy — Mediterranean posidonia seagrass covering the submarine floor, grouper, moray eels, and scorpionfish visible at depths of 5-15 meters, with exceptional clarity (15-25 meter visibility in calm conditions) in the protected coves of the Promontorio di Portofino. The dive centres in Camogli and Portofino town offer guided dives and snorkeling tours; the protected areas require entry permits (managed by the MPA). The Portofino Sec (a granite pinnacle at 32-36 meters) is the most spectacular single dive site in the MPA.

Ustica, Sicily

The small volcanic island of Ustica 60 km north of Palermo is Italy's most celebrated diving destination — the Riserva Marina di Ustica, Italy's first marine protected area (established 1986), has the highest concentration of marine biodiversity in the western Mediterranean, including protected species of grouper, barracuda, and amberjack that have reached sizes not found in unprotected areas. The visibility in Ustica's waters regularly exceeds 40 meters; the volcanic formations produce walls, arches, and caves at multiple depth levels. Access: ferry from Palermo (2.5 hours, or 1 hour hydrofoil).

Tremiti Islands (Puglia, Adriatic)

The Tremiti Archipelago in the northern Adriatic — a national park and marine reserve 80 km offshore from the Gargano peninsula — has the clearest Adriatic water and the most diverse marine life in the northern Mediterranean. The deep walls around San Domino (the largest island) drop to 30+ meters through forests of red coral, sponges, and gorgonian fans; the shallower areas have the dense concentration of sea stars and urchins typical of the Adriatic. Our full Tremiti Diving guide covers the specific sites and logistics.

Q&A: Italy Diving and Snorkeling

Do I need a diving license to dive in Italy?

Yes — scuba diving in Italy requires a recognized certification (PADI, SSI, CMAS equivalent). CMAS (the Italian and international diving federation) certifications are the local standard; PADI Open Water certification is universally accepted by Italian dive centres. "Try dive" programs for uncertified beginners are available at most Italian dive centres and do not require prior certification — a supervised orientation dive to approximately 5 meters. For snorkeling: no certification required; fins, mask, and snorkel are all you need in the free areas outside MPAs.

What is the best season for diving in Italy?

May-June and September-October for the combination of water temperature (18-22°C — warm enough without a dry suit, cold enough for best visibility) and the absence of summer tourist pressure on the most popular sites. July-August: warmer water (22-26°C), maximum visibility in the south, but dive centre boats are at maximum capacity and booking is essential weeks in advance. The Ligurian coast is coldest year-round (water temperature 14-18°C even in August) and benefits from a 5mm wetsuit in all seasons.