Reefwander
A tall column of basalt rock rises from the sea off Aci Trezza, with the town visible along the shore behind it — Catania.

Mediterranean · Italy

Catania & the Cyclops Islands

Basalt sea stacks, resident morays and an ancient-anchor trail off Aci Trezza

Photo: Castielli · CC BY-SA 3.0

The Isole Ciclopi marine protected area, established in 1989 around the basalt sea stacks off Aci Trezza, holds Catania's diving: eight marked itineraries on lava rock, mostly between 10 and 25 m, nearly all dived by boat or RIB. I Panettoni's basalt outcrops shelter morays and lobsters, a guided archaeological trail passes eight ancient anchors, and the capsized Terni wreck lies at 38–42 m a few minutes by boat off Catania.

About diving in Catania & the Cyclops Islands

A diving day here runs out of Catania, Aci Castello or Aci Trezza and stays short-range. Almost every itinerary goes by boat — even L'Antico Macello, in the water right off the Aci Castello promenade, is dived only by boat — while Faraglione Piccolo can be entered from shore for a night dive. Il Faro Diving boards at fixed times through the day, and the Terni wreck sits a few minutes' boat ride off Catania. Group diving inside the protected area must go through centres authorised by the reserve, and the strip around Isola Lachea and Faraglione Grande, marked by five yellow buoys, is closed to scuba outright.

The ground is lava. Basalt outcrops, boulder landslides and sea stacks sit on mixed sand and rock mostly between 10 and 25 m, with the two lighthouse-side itineraries dropping to 40 m. Big morays and lobsters hold the crevices at I Panettoni; groupers, brown meagre and large octopus are resident at Casa del Principe; and Il Castello adds rays, torpedo rays, anglerfish and shy pearly razorfish over the sand. The Percorso Archeologico threads past eight ancient anchors, from the first century BC to admiralty types, on a line led by reserve staff.

The area suits divers based in or near Catania who want easy, protected rock diving with a wreck and a drift at the experienced end: six of the eight marked itineraries are rated easy, and L'Antico Macello and Faraglione Piccolo double as night dives. The summer drift at Punta Aguzza runs medium current and requires an experienced guide, and the Terni wreck at 38–42 m demands advanced and deep training.

Best time to dive Catania & the Cyclops Islands

Catania & the Cyclops Islands season rating, sea surface temperature, daytime high and rainfall by month, 2011–2025 averages
JanFebMarAprMayJunJulAugSepOctNovDec
SeasonFairFairFairGoodGoodPrimePrimePrimePrimeGoodFairFair
Sea surface16°C61°F15°C59°F15°C59°F16°C61°F18°C64°F22°C72°F26°C79°F27°C81°F26°C79°F23°C73°F20°C68°F17°C63°F
Daytime high18°C64°F19°C66°F23°C73°F26°C79°F31°C88°F37°C99°F40°C104°F39°C102°F35°C95°F30°C86°F24°C75°F19°C66°F
Rain51 mm2.0 in59 mm2.3 in49 mm1.9 in24 mm0.9 in44 mm1.7 in9 mm0.4 in5 mm0.2 in14 mm0.6 in45 mm1.8 in79 mm3.1 in92 mm3.6 in55 mm2.2 in
Catania & the Cyclops Islands season rating, sea surface temperature, daytime high and rainfall by month, January to June, 2011–2025 averages
JanFebMarAprMayJun
FairFairFairGoodGoodPrime
Sea surface
16°C61°F15°C59°F15°C59°F16°C61°F18°C64°F22°C72°F
Daytime high
18°C64°F19°C66°F23°C73°F26°C79°F31°C88°F37°C99°F
Rain
51 mm2.0 in59 mm2.3 in49 mm1.9 in24 mm0.9 in44 mm1.7 in9 mm0.4 in
Catania & the Cyclops Islands season rating, sea surface temperature, daytime high and rainfall by month, July to December, 2011–2025 averages
JulAugSepOctNovDec
PrimePrimePrimeGoodFairFair
Sea surface
26°C79°F27°C81°F26°C79°F23°C73°F20°C68°F17°C63°F
Daytime high
40°C104°F39°C102°F35°C95°F30°C86°F24°C75°F19°C66°F
Rain
5 mm0.2 in14 mm0.6 in45 mm1.8 in79 mm3.1 in92 mm3.6 in55 mm2.2 in

2011–2025 averages. Sea surface: NOAA Coral Reef Watch, measured at the surface, so deeper water can run colder. Daytime high and rain: NASA POWER.

Dived year-round; late summer and autumn add pelagics at Capo Molini, and winter water drops to about 14°C.

Best months: June, July, August, September

Catania water temperature and weather by month

The sea surface runs from 15 °C (59 °F) in February to 27 °C (81 °F) in August. It is 24 °C (75 °F) or warmer from July to September. Most rain falls from September to March, peaking at about 90 mm (3.5 in) in November; June to August are the driest. Daytime highs reach 40 °C (104 °F) in July and drop to 18 °C (64 °F) in January. The coldest water here is about 14 °C (57 °F), so pack a 7 mm suit with a hood, or a semi-dry.

Dive types & marine life

Morays and lobsters are reliable in the basalt crevices, and groupers, brown meagre and large octopus are resident at Casa del Principe. Summer brings schools of seabream and salps, and in late summer and autumn large pelagics pass the drop-off at Faro di Capo Molini. Pearly razorfish are the signature sighting at Il Castello.

  • Reef
  • Wreck
  • Drift
  • Night
  • Groupers
  • Octopus & cuttlefish
  • Stingrays
  • Reef fish swarms
  • Macro critters

Best dive sites in Catania & the Cyclops Islands

Resident groupers, morays and large octopus below a prince's old residence

10–34 mintermediate

The Mediterranean's largest anemone, Alicia mirabilis, on a night-diveable shoal

11–21 mbeginner

Basalt platform dropping steeply to 40 m under the lighthouse

15–40 mintermediate

Big morays in the cracked basalt of three rounded outcrops

14–24 mbeginner

Pearly razorfish over the sand below the Norman castle

18–22 mbeginner

Large cerianthids in four colours on night explorations of the sand

13–25 mbeginner

Eight ancient anchors on a fixed line, 1st century BC to admiralty types

10–23 mbeginner

Shoal complex and summer drift on the reserve's southern boundary

14–40 mintermediate

Capsized 50 m wreck at the foot of an underwater cliff, 38–42 m

38–42 m · max 45 madvanced

How to get to Catania & the Cyclops Islands

Catania Fontanarossa airport is a few kilometres from the reserve; AMT city bus 534 and AST intercity buses link Catania to Aci Trezza. Centres sit in Catania itself (Jonio Pro-Dive, at Camping Junio) and on the Aci Castello seafront (DNA Divers).

Photos from Catania & the Cyclops Islands

  • gnuckx · CC BY 2.0

  • gnuckx · CC BY 2.0

  • Wilson44691 · CC0

  • gnuckx · CC BY 2.0

Photo credits

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