Ustica is a volcanic island roughly 67 km north of Palermo whose waters became Italy's first marine protected area in 1986 (a distinction shared with Miramare, gazetted the same day), offering some of the Mediterranean's clearest water — up to 40 m summer visibility — over basalt walls, a shrimp-filled cave, famously tame dusky groupers, and the Med's first underwater archaeological trail.
Destination info
Conditions, highlights, and the resident marine life.
Conditions
Water and air temperature across the year.
WaterAirDryShoulderWet
Description
Ustica is the emerged summit of a volcanic seamount in the southern Tyrrhenian, reached by a ~90-minute Liberty Lines hydrofoil (or ~3-hour ferry) from Palermo. Its 15,951-hectare Riserva Naturale Marina — promoted by the island's own fishermen and gazetted on 12 November 1986, jointly with Miramare the first marine reserve in Italy — has had four decades to work: dusky groupers grow huge and diver-tolerant, amberjack and barracuda carousel over the offshore shoals, and summer visibility can reach 40 m. Diving runs through MPA-regulated centers on 13 marked itineraries with fixed moorings, from beginner-friendly cave-and-canyon dives near the port to the signature offshore basalt of Secca della Colombara (with a 2005 wreck on its flank) and Scoglio del Medico's light-filled tunnels. Two honest caveats: much of what makes Ustica famous sits deep for recreational diving — red gorgonian forests at 30–40 m and the Grotta dei Gamberi entrance at ~40 m reward Advanced/Deep certification — and the season is sharply seasonal, with operators running roughly May–October (water 18–26°C, dipping to ~14°C in winter) and most island businesses closed off-season. The ~60-hectare integral Zone A is fully no-take: even scuba diving is banned there, with only shore swimming allowed. The reserve also protects the Mediterranean's first underwater archaeological itinerary, where Roman-era anchors and amphorae lie in situ at Punta Gavazzi.
Highlights
What makes this dive worth the trip.
Ustica's waters became Italy's first marine protected area: the Riserva Naturale Marina 'Isola di Ustica' was gazetted on 12 November 1986 — a 'first' the reserve itself notes it shares with Miramare in Trieste — at the urging of local fishermen. It covers 15,951 hectares in three zones, including an integral ~60-hectare Zone A where no human activity except shore swimming is allowed (not even scuba diving), while diving in Zones B and C is regulated by the MPA authority.
Visibility is among the best in the Mediterranean: in summer it can reach 40 m, with most dives around 25 m, and the season runs from the beginning of May to the end of October — protection since 1986 is widely credited for the density of grouper, amberjack, and barracuda on the offshore shoals.
Anchor stocks discovered in June 1989 on the island's south-western slope were deliberately left on the seabed to form the first underwater archaeological itinerary on the Mediterranean's coasts, at Punta Gavazzi: roughly ten Roman-era artifacts — including a lead anchor stock at 17 m — along a ~300 m guided line, with explanatory panels added in 1994. After four years of trials, none of the anchors visited by thousands of divers had been tampered with, and the model was copied internationally.
Marine life
19 species you’re likely to encounter on a dive here.
Dive sites
6 signature sites at this destination.
Secca della Colombara
Ustica's signature dive: a basalt shoal off the island's north coast around the Colombara rock, rising to ~3 m and dropping over a column-jointed wall to a plateau at ~30 m, with flanks continuing to ~40 m. Orange Astroides corals carpet the walls, large dusky groupers hold station, and amberjack and barracuda circle overhead. A commercial vessel that struck the shoal and sank in 2005 lies on its side on the flank (accounts place the wreck variously between ~10 and 30 m), adding a wreck leg to the classic circuit. Regularly named among the best dives in the Mediterranean.
3–40 mintermediateDay boatModerateVisibility 20–40 m
Punta Gavazzi (archaeological trail)
The underwater archaeological itinerary below the Punta Cavazzi lighthouse at the island's south-western tip, an ancient anchorage where Roman-era (and, per the operator, Byzantine-era) anchor stocks and amphora fragments were left exactly where they were found in 1989. A ~300 m marked line between about 10 and 24 m links roughly ten artifacts, each signalled by a small float with an explanatory card — including a lead Roman anchor stock at 17 m. An easy, shallow, historically unique dive; everything is protected cultural heritage and strictly look-don't-touch.
10–24 mbeginnerDay boatLightVisibility 20–40 m
Grotta della Pastizza
A cave-and-wall complex a few hundred metres from Ustica's port, beneath the pastry-shaped Pastizza stack. Shallow caves chain together — one with an air chamber holding a statue of San Bartolicchio, the island's patron saint — alongside the Accademia complex of four distinct caves no deeper than 12 m, before an outside wall drops to about 25 m. It is one of the island's classic night dives, when conger and moray eels, slipper lobsters, shrimps, cuttlefish, octopuses, sea hares, and cowries emerge.
5–25 mbeginnerDay boatLightVisibility 15–30 m
Punta dell'Arpa
The island's southernmost point, under ten minutes from the harbor: a boulder field with passages, a small cave, and a Posidonia meadow in the shallows, then four huge rock formations between roughly 12 and 35 m entirely covered in red and yellow gorgonians — the closest thing Ustica has to a guaranteed gorgonian forest, and a standard venue for Advanced and Deep training dives. Brown groupers, forkbeards, lobsters, and black morays hold the rocks; amberjack and barracuda schools pass in the second half of the season.
5–42 mintermediateDay boatLightVisibility 20–40 m
Scoglio del Medico
A bare basalt rock breaking the surface about a kilometre off the west coast — widely called Ustica's most famous site, and too big to cover in one dive. A canyon drops from the surface to ~30 m; a tunnel roughly 25 m wide at 20 m depth funnels spectacular light, and the Grotta della Balena cavern (entered at ~18 m, extending to ~26 m) often holds dusky groupers lined up inside. Out on the pinnacle, carousels of amberjack and barracuda turn in blue water.
3–36 mintermediateDay boatLightVisibility 20–40 m
Grotta dei Gamberi
The Shrimp Cave at Punta Galera on the south coast: a wide entrance arch on sand at around 40 m opens into a cavern roughly 130 m long and up to 8 m high, whose walls and vault seem to move under thousands upon thousands of narval shrimp. Conger eels and lobsters hide in the recesses, and the ascent back up the reef passes large groupers, bream, and barracuda. A deep, dark, overhead dive — Deep certification is the stated minimum and operators rate it high difficulty.
26–42 madvancedDay boatLightVisibility 15–30 m
Where to dive & stay
Local dive centers, resorts, and hotels.
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