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Andros · about 3 km from Nicholls Town

Conch Sound Blue Hole

  • CertificationFull cave
  • SpecialExperienced divers
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Directions

Diving and fills

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Fills nearby

  • Fill stationSmall Hope Bay Lodge (Central Andros)~80 min drive (estimate)Air and nitrox ($15 per tank); trimix and O₂ not listed — askRoute ↗
All fill stations and places to stay ↓

The dive

A tidal blue hole with large karst conduits at depth. The water is brackish and becomes less saline ~1.15 km in (Smart 1984). A net outflow of 1.57 m³/s was measured in 1981.

Tidal flow: ocean-connected blue holes 'breathe' with the tide. Plan around slack water with local knowledge.
Source: Smart 1984 – Hydrology of the inland blue holes, Andros (Cave Science) ↗Source: Out Islands of the Bahamas – Diving blue holes ↗
Profile and sections

A tidal blue hole with large karst conduits at depth. The water is brackish and becomes less saline ~1.15 km in (Smart 1984).

A net outflow of 1.57 m³/s was measured in 1981. Kakuk calls it his longest marine cave exploration.

Depth and profile
>1,829 m of passage explored (Kakuk) · depth not published
Configuration
No data.
DPV: unknown
Long passage, but flow and profile unknown
Who can dive where
  • CaveAt least Full cave
  • Whole caveConfigurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
  • Whole caveConfiguration unknown — research beforehand · doesn't decide who may dive
  • Whole caveExperienced divers only · doesn't decide who may dive
Experienced diversDepends on water level or swellThrough 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

Reachable by land at the settlement of Conch Sound. No public dive offering found; Brian Kakuk guided a group based at Small Hope Bay Lodge here in 2012.

Plan your route ↗

Around Conch Sound Blue Hole

Fills1 fill station · 50 km

  • Small Hope Bay Lodge (Central Andros)

    ~80 min drive (estimate)

    Small Hope Bay, Central Andros

    Air and nitrox ($15 per tank); trimix and O₂ not listed — ask

    Dive boat 9:00 and 14:00; fills for visiting divers: ask

    Dive lodge since 1960. BCD, regulator and wetsuit rental $35 a day; courses up to Advanced. No tech or CCR support listed.

    Website ↗Navigate ↗
Where to sleepAround Nicholls Town on Booking.com ↗

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Caves nearby1 within 4 km

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Sources, sharing and disclaimer

Sources

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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 (Small Hope Bay Lodge, Andros Beach Club/Andros Diving, bahamas.com, Bahamas National Trust, National Geographic 2010, Scuba Diving 2011, Blue World TV, InDepth 2026, Schwabe & Herbert 2004, Smart 1984, Wondermondo, OpenStreetMap/Mapcarta, Explorersweb, Caribbean Beat, Out Islands, Friends of the Environment, Wikipedia, Get Ready Bahamas; Sept 2026; Ocean Blue Hole: Undercurrent 2003 and 2022, Oct 2026). Pins: Black Hole from the 2004 paper's GPS, Uncle Charlie's and Conch Sound from OpenStreetMap, Guardian approximate (wannadive); the others unknown. ~ = estimate. Rules and access change — check locally.