Campi Flegrei sits on the Tyrrhenian Sea in the Gulf of Naples and is defined by one of the world's most unusual diving environments: a submerged volcanic landscape that happens to contain ancient Roman ruins. Sites such as Portus Julius, Parco Sommerso di Baia, and Ninfeo di Claudio preserve mosaic floors, columns, and monumental architecture that slipped beneath the sea through volcanic subsidence. Most dives are shallow, making the area accessible to beginners, though the full site range extends to moderate depths. Boat and shore entries are both available, with operators based across Bacoli, Pozzuoli, and Naples.
Monthly water temperature across Campi Flegrei's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water temperatures stay cool through spring, typically around fifteen degrees, then rise through summer to a peak in late August before dropping back through autumn. The warmest and most comfortable months for diving without a heavy wetsuit are July through October.
15 operators
Water temperature around Campi Flegrei ranges from about 14°C in March to 26°C in July, based on satellite sea-temperature data for its dive sites.
In the warm season (about 26°C) a 3mm full suit is comfortable in Campi Flegrei; in the coldest months (about 14°C) step up to a 7mm or semi-dry suit.
Fin maps 9 sites in Campi Flegrei (9 scuba diving sites and 1 snorkelling spots, with some suited to both).
2 more sites to explore
