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Azores

Furnas do Monte da Guia (Faial)

  • Max depth40 m
  • CertificationIntro to cave
  • Water temperature≈ 14–22 °C, varies with the seasonestimated, no reports yet
  • SpecialExperienced divers

The dive

Two large caverns lie close together in the slope.

Per the tourism board only for experienced divers certified in cave diving: the entrances at 20 m lead through a corridor less than 2 m wide. There can be weak to moderate current.
Profile and sections

Two large caverns lie close together in the slope. In the first you follow a long corridor to a large chamber, where the backlight in the dark space is striking; the walls are colourful with starfish, nudibranchs, fan worms and narwal shrimp. On the way to the second, slightly smaller cavern you pass the wreck of a small metal vessel. Along the wall Dive Azores reports eagle rays, dusky groupers and pelagic fish.

Because the two caverns are so close, you can see both in one dive.

Practical: Dive Azores goes there from Horta marina. The site lies in the Monte da Guia marine reserve.

Depth and profile
Plan for 40 m: Dive Azores gives 5–40 m for the steep wall. The tourism board gives max 30 m (average 24 m): two caverns 50 m apart, both with the entrance at 20 m, and a small wreck at 24 m between them.
Configuration
A long corridor less than 2 m wide to a large chamber: backmount and sidemount (estimate).
DPV: Not DPV-suitable (estimate)
Two short caverns — not a scooter dive.
Who can dive where
  • CaveAt least Intro to cave
  • Whole caveConfigurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
  • Whole caveGoes down to 40 m (trimix or deco may be needed) · doesn't decide who may dive
  • Whole caveExperienced divers only · doesn't decide who may dive
Experienced diversEntry or dive feeThrough 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

Boat dive, ten minutes from Horta harbour, on the slope of Monte da Guia. Dive Azores dives here.

Plan your route ↗

Around Furnas do Monte da Guia (Faial)

FillsNo fill station known nearby
Other sites1 within 1 km

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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 (Nov 2026): the Azores tourism board's official dive pages (Visit Azores: the dive spots, the islands, when to dive and the hyperbaric chambers), the websites of Dive Azores (Horta, with its own map of the dive sites), Scubazores Divers (Terceira) and Haliotis Santa Maria, Wikipedia, OpenStreetMap and the Jornal Oficial dos Açores. Pins from Dive Azores' map (Faial) and Wikipedia (Cinco Ribeiras); the Santa Maria caves have no pin. These are sea caves and lava galleries, dived by boat or from the shore with a local dive centre; certification and configurations are estimates. Rules change — check locally.