The Blue Hole is a submarine sinkhole reaching over 100 m in depth and is well known for freediving due to its sheltered conditions, calm surface, and immediate access to deep water from shore. Notable underwater features include the shallow saddle at around 6 m, a 26 m long tunnel known as the Arch with its upper section at about 56 m, and surrounding coral walls inhabited by reef fish and other Red Sea marine species. The area also supports snorkeling, SCUBA diving, and windsurfing, with land-based activities and excursions to Mount Sinai and Saint Catherine’s Monastery available nearby.

To go through the arch , the free diver and the safety team should be able to dive to around 70 m so that the safety is ensured

• Visibility: Typical visibility ranges from about 20–40 m.

• Depth Range: The Blue Hole drops to over 100 m, with recreational dives typically to around 28–30 m; the arch ceiling is at approximately 56 m.

• Water Temperature: Seasonal range roughly 21–29 °C.

• Water Conditions: Generally calm with minimal current inside the hole; conditions are protected by the surrounding reef.

• Seasonality: Diving and freediving are possible year-round, with spring and autumn often offering comfortable temperatures and good visibility.

• Transportation: Dahab is accessed primarily via Sharm el-Sheikh International Airport, followed by an overland journey of approximately 80–100 km by car, taxi, shuttle or minibus along the coastal road to Dahab, taking around 1.5–2 hours; the Blue Hole itself lies about 8–10 km north of Dahab town centre and is reached by short road transfer.

• Local rules: Divers should use CDWS-registered operators, respect protected area regulations, and follow dive centre safety protocols.