Malta, Gozo and Comino · about 2 km from Marsalforn
Submarine Cave and Triple Arch (Xwejni)
- Max depth45 m
- CertificationCavern
- Water temperature≈ 16–26 °C, varies with the seasonestimated, no reports yet
- SpecialExperienced divers
Diving and fills
Dive here with
Fills nearby
- Atlantis Diving Centre (Marsalforn)Air, nitrox, O₂, trimix and helitrox; everything boosted to 225 bar
- Gozo Technical Diving (Xewkija)Recreational and technical gases: custom trimix (Nardi blender), O₂ boosted to 200 bar
- Ritual Dive (Xlendi)Trimix (helium and oxygen in stock)
What it looks like
All 1 videos and posts
Videos and posts
From other divers, via YouTube, Instagram and Facebook. They only load when you click; after that, Google's or Meta's privacy rules apply.
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Other people's footage, not advice: how someone else dives here says nothing about what suits your team. Dive within your training.
The dive
At the edge of a reef, the underwater extension of the headland, you drop along a steep wall with narrow horizontal cracks.
Profile and sections
At the edge of a reef, the underwater extension of the headland, you drop along a steep wall with narrow horizontal cracks. Through them you reach a large cave whose roof has collapsed: two huge holes with a narrow rock bridge between them that looks like an arch from below. Looking back at the north wall you see 'the Face', with two 'eyes' and a big 'mouth'. A quarter of an hour's diving to the west, towards Double Arch, lies Submarine Cave, with a silty floor. You see groupers, scorpionfish, amberjack, morays, octopus, starfish, tuna, damselfish and saddled bream.
Despite its name the Triple Arch is not a tunnel or an arch but a collapsed cave; maltadives.com calls it Calypso Cave or Calypso Tunnel. The name Submarine Cave has nothing to do with a submarine.
Practical: maltadives.com rates Submarine Cave 'Experienced' and Calypso Cave 'Advanced'; divers often combine the two with Double Arch. Pin from maltadives.com (approximate).
- Depth and profile
- Site average -30 m, beyond -45 m (maltadives.com). Triple Arch: narrow horizontal cracks at -21 m and -30/-32 m lead into a large cave of >30 m; the best view is at -19 m under the 'arch'. Submarine Cave: from -21 m to a silty bottom at -34 m (Atlantis); length not published.
- Configuration
- Backmount or sidemount (estimate); you enter through narrow horizontal cracks. For a long dive divers advise a tech setup or very good air consumption.
- DPV: DPV possible (estimate)
- A scooter shortens the long swim from the shore; little gain inside the caves.
Who can dive where
- At least Cavern
- Configurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
- Goes down to 45 m (trimix or deco may be needed)
- Experienced divers only
This is how the planner decides who in your team may dive this cave. Rules your own trip adds (organizer, a mail, the AI) show with your trip.
How to get there
By boat, or from the shore at Xwejni (entry rated 'medium' by maltadives.com) with a long swim, sometimes with current. The Triple Arch (Calypso Cave) lies ~100 m offshore north of Marsalforn Tower; Submarine Cave is ~15 minutes' diving further west along the same wall, towards Double Arch. Atlantis Gozo dives here.
Around Submarine Cave and Triple Arch (Xwejni)
Fills3 fill stations · nearest 1 km
Atlantis Diving Centre (Marsalforn)
Triq il-Qolla s-Safra, Marsalforn, Gozo
Air, nitrox, O₂, trimix and helitrox; everything boosted to 225 bar
7:30–16:30; order blends one day in advance
Tech centre with a rebreather corner (Divesoft Liberty), Bonex scooters, stages and sidemount sets; guided tech dives. Cylinder rental for unguided divers (~€110–120 for 5 days of unlimited air). Walk-in tech fills for visitors: ask.
Gozo Technical Diving (Xewkija)
Mġarr Road (Mariblu Hotel), Xewkija, Gozo
Recreational and technical gases: custom trimix (Nardi blender), O₂ boosted to 200 bar
Filling station daily 9:00–18:00; arrange special gases in advance
CCR rental and training (Triton, JJ-CCR, Divesoft Liberty SM; ~€80/day), ask about sofnolime, scooter rental. Supports unguided divers: morning sea and weather briefing, €10 per person per day for facilities, pickups for rent. Cave training locally up to intro-to-cave.
Ritual Dive (Xlendi)
2/4 Triq il-Gostra, Xlendi XLN 1404, Gozo
Trimix (helium and oxygen in stock)
Ask
Guided tech dives, also on CCR to -60 m; CCR rental and gas prices on their price list; scooter course. Whether you can get walk-in fills: ask.
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News
All (2)
Nearby
Articles about cave diving that name a place within 25 km of this site, but no cave by name. They're not necessarily about this site.
Access and rules change: check what applies locally right before your trip. Source: GDELT Project and the news feeds of diving magazines. Search for more news ↗ Searched automatically, last on 5 Nov 2026.
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