Blue Hole (Dahab)
Location guideRas Mohammed

Blue Hole (Dahab)

540 madvanced+geologycoral● In season now

Planning a trip?

Hotels, dive operators, gear, and how to get here are on the Ras Mohammed location page.

Overview

A near-circular sinkhole punched through the fringing reef on Sinai's east coast, 10 km north of Dahab, dropping past 100 m just a few fin-kicks from shore. Freedivers and scuba divers descend a coral wall thick with lyretail anthias, bluecheek butterflyfish and the occasional hawksbill turtle into still, clear blue water — the lack of current is why it became the world's premier shore freediving site. A shallow notch called the Saddle (about 6 m) links the hole to the open sea, while the notorious Arch — a 26 m tunnel whose ceiling sits at 55 m and whose floor falls to 120 m — pierces the seaward wall. The tunnel's deceptive clarity and depth have made this the deadliest dive site on record; most divers stay on the bright shallow reef rim.

Briefing note

Reputed to have the highest diver death toll of any site in the world — most fatalities involve recreational divers attempting the Arch (ceiling 55 m, floor 120 m), which is a technical-only objective requiring trimix and overhead training. The shallow reef rim and the Saddle are an easy open-water shore dive; do not be tempted deeper. Memorial plaques to lost divers line the cliff above the entry. Shore access only; small fee and parking at the Bedouin camps.

What you'll see

7 species curated
  • Lyretail anthias
    year-round
  • Bluecheek butterflyfish
    year-round
  • Hawksbill turtle
    year-round
  • Napoleon wrasse
    year-round
  • Bigeye trevally
    year-round
  • Bluespotted ribbontail ray
    year-round
  • Whitetip reef shark
    rare

Conditions

MonthWaterVisibilityCurrent
Jan2123 °C2540 mmild
Feb2122 °C2540 mmild
Mar2123 °C2540 mmild
Apr2224 °C2540 mmild
May2426 °C2535 mmild
Jun2628 °C2030 mmild
Jul2729 °C2030 mmild
Aug2829 °C2030 mmild
Sep2729 °C2535 mmild
Oct2628 °C2540 mmild
Nov2426 °C2540 mmild
Dec2224 °C2540 mmild

Season calendar

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Peak season highlighted · current month outlined

Gear for this site

Beyond the basic kit
  • Dive computer with depth/deep-stop alarmsThe wall drops past 100 m at the rim, making it easy to exceed your planned depth without a hard reference
  • SMBBoat traffic and freedivers share the surface; mark your ascent before you come up the open wall
  • Reef hook or good buoyancy disciplineThere is no bottom to stand on over the hole — neutral trim keeps you off the shallow corals on the Saddle

Next step

Book your trip to Ras Mohammed

Hotels, liveaboards, dive operators, gear recommendations, and travel logistics for the whole region.

Plan your trip →

Some links earn us a commission. Learn more