Vattenholmen West is a reef and wall site located off the coast of Smögen, Sweden. The topography features a wall dropping into deep water, with depths ranging from 16 to 38 metres and an average depth of 19 metres. Divers should expect cold water temperatures between 4 and 13 degrees Celsius, necessitating a drysuit. Visibility typically fluctuates between 5 and 12 metres. While currents are generally mild, they can strengthen, and the site requires boat access. Due to the depth and potential for current, this site is suited for intermediate divers. Species recorded around this area include soft coral, brittle stars, crabs, snails, and various nudibranchs.

Kostersten is a reef system located in the cold waters of the North Sea near Smögen. The site features a topography that drops from 22 to 45 metres, with an average depth of 30 metres. The reef is characterised by kelp forests and bordering seagrass beds. Access is by boat only. Conditions include mild currents and visibility ranging from 10 to 30 metres. Due to the cold water temperatures between 4 and 13 degrees Celsius and the significant depth, this site is suited for intermediate divers. Divers must use a drysuit and manage gas consumption carefully to mitigate risks associated with nitrogen narcosis and deep diving.

Bleksund is a boat-access reef located off the coast of Smögen, Sweden. The site features a rocky reef topography with depths ranging from 16 to 35 metres. Divers can expect mild currents and visibility typically between 10 and 30 metres. Due to water temperatures ranging from 4 to 14 degrees Celsius, a drysuit is recommended for all dives. While the site is manageable for beginners working on buoyancy, the depth requires careful planning and adherence to certified depth limits. Cold water conditions are a primary hazard, necessitating conservative bottom times even during the warmer summer months.

Vitbukt is a rocky reef located off the coast of Smögen, Sweden. Accessible only by boat, the site features a reef structure that descends from 8 metres to a maximum depth of 26 metres. Divers encounter mild currents, though local surge and swell conditions can vary. Visibility typically ranges between 5 and 10 metres. Due to cold water temperatures ranging from 4°C to 15°C, appropriate thermal protection, such as a drysuit and hood, is strongly recommended. The site is suitable for beginner divers, provided they are comfortable with cold-water environments and maintain good buoyancy to avoid the sharp reef surface.

Svarteberget is a reef site in southern Norway characterised by a rapid drop-off into deep water. Divers typically explore depths between 20 and 50 metres, with an average depth of 35 metres. The site features mild currents and visibility ranging from 5 to 10 metres. Due to the cold water temperatures, which fluctuate between 4 and 13 degrees Celsius, a drysuit is essential. Access is by boat only. Divers should remain vigilant regarding boat traffic at the surface and potential entanglement hazards within the reef structure. Species recorded around this area include the orange-clubbed nudibranch, grey sea slug, and various snails.

Lilla Knappan is a wall dive located off the coast of Smögen, Sweden. The wall drops from the surface to a maximum depth of 22 metres. This site is accessible by boat only and features mild currents, making it suitable for beginner divers. The rocky topography provides shelter for various temperate marine life. Water temperatures range from 4C to 16C, necessitating appropriate thermal protection such as a drysuit or thick wetsuit with hood and gloves. Visibility at this site is variable, so conditions should be checked locally before diving. Divers should exercise caution regarding sharp rocks and depth.

Stora Knappen is a demanding wall and reef site located in the Bohuslän archipelago near Smögen. The site features a vertical wall dropping to 35 metres, with an average depth of 22 metres. Divers encounter strong currents and surge, requiring advanced buoyancy control and current-reading skills. Visibility typically ranges from 10 to 15 metres. Given the depth profile and potential for nitrogen narcosis below 30 metres, this site is strictly for advanced divers. Boat access is required, and the use of a surface marker buoy is essential due to local boat traffic. Divers must plan for decompression stops and monitor gas consumption carefully throughout the dive.

Nörra Dyngön is a wall dive located off the coast of Smögen, Sweden. The site features a wall that extends from the surface to a depth of 20 metres. Due to the wall topography, depth management is straightforward, making it suitable for beginners to explore shallower sections. Access is by boat only. Divers should be prepared for mild currents and variable visibility. Water temperatures range from 4C to 16C throughout the year, making a drysuit with appropriate undergarments essential for safety. Cold water is the primary hazard at this location, and divers should monitor their thermal comfort closely.