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Caverns and lava tunnels of Mauritius and Réunion

Carpenter (Coin de Mire)

  • Max depth18 m
  • CertificationCavern
  • Water temperature≈ 22–28 °C, varies with the seasonestimated, no reports yet

Diving and fills

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The dive

Along big sweeping walls you dive into caverns and swim-throughs. Because the site sits at the tip of the island, a current runs through it that draws schools of fish and barracuda.

A current runs at the tip of the island, past the caverns too: dive it with a guide and stay with your buddy.
Profile and sections

Along big sweeping walls you dive into caverns and swim-throughs. Because the site sits at the tip of the island, a current runs through it that draws schools of fish and barracuda.

Practical: PADI recommends its Drift Diver and Cavern Diver courses.

Depth and profile
Walls with caverns and swim-throughs; down to 18 m. Visibility up to 30 m.
Configuration
Caverns in a wall, with current: recreational gear with a torch (estimate).
Who can dive where
  • CaveAt least Cavern
  • Whole caveConfigurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
  • Whole caveGoes down to 18 m (trimix or deco may be needed) · doesn't decide who may dive
Through a dive centre or guide

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 to Coin de Mire, the islet off Mauritius's north coast. The source names no dive centre: ask the centres in the north.

Plan your route ↗

Around Carpenter (Coin de Mire)

FillsNo fill station known nearby
Other sites2

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Sources, sharing and disclaimer

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Certification requirements, configurations and trimix depths are estimates for planning. Always check them locally and dive within your training. Compiled from web research (Oct 2026): dive centres' site pages in SSI's dive guide (SeaUrchin Diving Center, Scubananas), dive.site, the activity pages of Plongée Salée and Scuba World Diving and the article on Réunion's best dive spots on manawa.com, the PADI blog on the top ten dive sites of Mauritius (updated Sep 2026), Le Figaro Nautisme (2015 and Nov 2025), the INPN's ZNIEFF sheets on Les grottes du Portail (2020), Mauritius's official tourism site, the ARS La Réunion list of hyperbaric chambers (Apr 2023), the Réunion marine reserve's leaflet and an e-mail from its management (GIP Réserve Naturelle Nationale Marine de La Réunion, Nov 2026) and a prefecture draft order on shark sightings. These are caverns, reef caves and basalt tunnels with daylight, all boat dives with a dive centre. No source gives coordinates. Certification and configurations are estimates.