Depth
0m
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Gozo  ·  Open Water  ·  3-10m

Xlendi Tunnel
70m through the headland

A natural cave-tunnel bored through the rocky headland on the northern wall of Xlendi Bay. The passage runs 70 metres from one bay to the next, with cracks in the ceiling admitting daylight along the entire route. At a maximum depth of 10m, it is one of the few cave dives in Malta and Gozo accessible to Open Water divers.

Book This Dive Dive Conditions
3m
Min Depth
10m
Max Depth
Open Water
Level
20-25m
Avg. Visibility
Shore
Entry Type
Year-round
Season
Depth Profile

History & Background

  • Geological
    The Xlendi Tunnel is a natural passage cut through the limestone headland at the entrance to Xlendi Bay. The tunnel is approximately 70m long, with the entry point on the outer reef at 6m and the exit inside the bay at approximately 8–10m. The tunnel formed by wave erosion working through a weakness in the limestone stratum over thousands of years.
  • 1980s
    The Xlendi Tunnel was documented by Gozo diving operators in the 1980s as part of a series of natural features at Xlendi Bay. The tunnel's manageable depth range and full natural light penetration made it immediately popular as a training site for cavern and tunnel diving introduction.
  • Today
    The Xlendi Tunnel remains one of Gozo's most popular introductory tunnel dives. Open Water certified divers can enter under supervision; the full light penetration and short length make it a non-intimidating introduction to overhead environments. Combined naturally with the Xlendi reef and Bay dive for a full morning. Shore entry from Xlendi Bay.

The tunnel entry on the outer reef begins at 6m beneath a limestone overhang. The passage is wide enough for two divers side by side in the central section, narrowing slightly toward the bay exit. Full natural light penetrates from both ends throughout the tunnel length. The walls and ceiling are covered in encrusting sponges, green algae, and hydroids in the lighter sections, with denser encrusting species toward the centre. Octopus inhabit crevices on the tunnel floor. Exiting into Xlendi Bay, divers encounter a sand and seagrass slope from 10m up to 2m at the beach. Seabream, mullet, and garfish are common in the bay. A natural extension dive links to the outer Xlendi reef, where the depth drops to 35m on the outer wall. Pairs naturally with the Inland Sea for a Gozo tunnel-dive day.

XLENDI TUNNEL DEPTH PROFILE (10m) OW ZONE 0m 6m 10m Entry 6m Exit bay ~70m tunnel Xlendi Bay
Marine Life

What You Might See

Species commonly encountered at this site, based on depth and habitat. Click any card to read the full species guide.

Rainbow Wrasse underwater Malta 0–30m
Bony Fish

Rainbow Wrasse

Coris julis
Painted Comber underwater Malta 5–150m
Bony Fish

Painted Comber

Serranus scriba
Mediterranean Cardinalfish underwater Malta 0–40m
Bony Fish

Mediterranean Cardinalfish

Apogon imberbis
Jewel Anemone underwater Malta 0–50m
Cnidarians

Jewel Anemone

Corynactis viridis
Common Octopus underwater Malta 0–100m
Molluscs

Common Octopus

Octopus vulgaris
Peacock Worm underwater Malta 0–100m
Worms

Peacock Worm

Sabella pavonina
Greater Hermit Crab underwater Malta 3–80m
Crustaceans

Greater Hermit Crab

Dardanus arrosor
European Fan Worm underwater Malta 0–120m
Worms

European Fan Worm

Sabella spallanzanii
Site Identification

Not to be confused with the MV Xlendi wreck

The Xlendi Tunnel is a natural rock formation at Xlendi Bay on the southwestern coast of Gozo. It is a completely separate site from the MV Xlendi wreck, which lies at Xatt l-Ahmar on the southeastern coast at 45m depth. If you are booking a technical wreck dive, you are looking for the MV Xlendi page. This page covers the shallow cave-tunnel at Xlendi Bay.

Dive Conditions

When to dive the Xlendi Tunnel

PeriodWater TempVisibilityConditions
Jan-Mar14-16°C20-25mCold, very clear; 7mm suit recommended; site sheltered from north winds
Apr-Jun17-22°C20-25mExcellent conditions; water warming; busy Easter period
Jul-Sep25-28°C15-22mPeak season; warm water; bay can be busy with snorkellers
Oct-Dec18-23°C20-28mGood visibility returns; quieter; northwest swells reach south Gozo by late Nov
Summer visibility (Jul-Sep)
Winter/spring visibility (Jan-Jun)

Currents

No significant current operates inside the tunnel. Xlendi Bay itself is sheltered from the prevailing northeasterly winds by the surrounding headlands, making it one of the calmer shore entries in Gozo.

Entry and Exit

Shore entry from the northern wall of Xlendi Bay, rated hard due to the awkward scramble over rocky terrain to reach the water. Water shoes or rock boots are strongly recommended. Exit is via the same rocky entry point.

Equipment Notes

A torch improves the experience even though natural light enters the tunnel; it helps inspect crevices for morays. A 5mm wetsuit covers summer dives; 7mm for winter. No SMB required for the tunnel itself, but carry one if extending onto the reef.

Dive Briefing

Safety and planning

Certification Level Required

Open Water certification or equivalent is the minimum requirement. The maximum depth of 10m and the ability to surface inside much of the tunnel place this within recreational limits. Divers should be comfortable with confined-space environments before entry.

Rocky Entry Point Required

The entry on the northern wall of Xlendi Bay is rated hard. The approach involves traversing uneven rocky ground. Wear rock boots or thick-soled water shoes. Assess the entry point before gearing up and plan the exact path in and out before you enter the water.

Torch Recommended Recommended

Natural light is present throughout the tunnel in clear conditions but carries a torch regardless. Visibility can reduce temporarily in overcast weather or if silt is disturbed near the seabed. A torch is useful for examining crevices along the walls where morays shelter.

Buoyancy Control Required

Maintain neutral buoyancy above the shingle seabed throughout the passage. Fin contact with the bottom will raise silt and reduce visibility for the diver behind. Take a few extra seconds to trim your buoyancy before entering the tunnel.

Surface Awareness Required

Snorkellers and swimmers use Xlendi Bay regularly in summer. Before surfacing inside the tunnel or at the exit point, confirm the area above is clear. The ability to surface in many tunnel sections is useful for gas management but requires overhead awareness.

Dive Plan: Tunnel Only or Combined Required

Agree before entering whether the dive plan includes the reef after the tunnel. Gas planning differs significantly between a 70m tunnel transit at 10m and a combined tunnel-plus-reef dive that may extend the bottom time. Plan to the more conservative gas reserve.

Book This Dive

Dive the Xlendi Tunnel with diveshack

diveshack runs guided dives to the Xlendi Tunnel as part of Gozo day trips. The site pairs naturally with Xlendi Reef on the same visit for a full morning of diving from the same entry point. All dives include a site briefing, guided tunnel transit, and surface cover throughout. Equipment rental is available.

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