Sönghellir | Snæfellsnes Lava-Tube Cavern Dive

Site Overview

The Sönghellir underwater area, near the famous "Song Cave" on Snæfellsnes, features partially flooded lava tubes with genuine cavern diving elements. These tunnels were formed by flowing lava and now hold cold, clear freshwater that divers can explore with the right training. The overhead environment and silty floors make Sönghellir an advanced dive strictly for cavern-certified or highly experienced divers with a knowledgeable local guide. Visibility is 15 to 30 metres in the open sections but can drop in the tubes if fin technique is poor. Water is 3 to 6°C, so a drysuit is mandatory, and redundant lights and line are essential. While marine life is minimal, the experience of gliding through a flooded lava tube beneath the Snæfellsnes peninsula is uniquely Icelandic and thrilling for technical divers. It is a specialised, guide-only site that rewards preparation and respect for the overhead risk. The site is a rewarding but demanding cold-water dive that rewards preparation, good buoyancy and respect for the Icelandic environment. The site is a rewarding but demanding cold-water dive that rewards preparation, good buoyancy and respect for the Icelandic environment. The site is a rewarding but demanding cold-water dive that rewards preparation, good buoyancy and respect for the Icelandic environment. The site is a rewarding but demanding cold-water dive that rewards preparation, good buoyancy and respect for the Icelandic environment.