Selsey Beach is a shore-accessible site featuring a mix of reef and artificial reef structures. Suitable for intermediate divers, the site offers depths ranging from 2 to 6 metres with an average of 5 metres. Conditions include strong currents and variable visibility between 3 and 8 metres. Divers should be aware of boat traffic from the active fishing fleet and local lifeboat station, making the use of a surface marker buoy essential. The site is also suitable for night diving. Water temperatures fluctuate between 9C and 19C throughout the year. Typical dives last approximately 50 minutes, with the best conditions found near slack water.

Selsey Lifeboat Station offers a shallow shore dive ranging from 1 to 10 metres, with an average depth of 6 metres. The site consists of an artificial reef structure alongside natural reef formations. It is suitable for beginners, though divers should be aware of moderate currents, surf, and boat traffic in the area. Water temperatures fluctuate between 9C and 19C throughout the year, and visibility typically ranges from 2 to 5 metres. The site is accessible for shore entries and supports night diving, with typical dive times around 50 minutes. Facilities including parking and toilets are available nearby for visiting divers.

Mixon Hole is a reef and wall site located 1600 metres off the coast of Selsey. This drop-off features depths ranging from 6 to 30 metres, with an average depth of 22 metres. The site is defined by strong currents, making it suitable for intermediate divers comfortable with drift conditions. Visibility typically ranges between 10 and 15 metres. Boat access is required to reach the site, and divers must be aware of boat traffic at the surface. Water temperatures fluctuate seasonally between 9 and 19 degrees Celsius. Planning dives around slack water is essential for managing the currents safely.

Arno is a shore-entry reef site located in Selsey, United Kingdom. The site features a wall with depths ranging from 20 to 30 metres. Divers should be aware of moderate to strong currents present at the wall. Visibility at this location is variable and can shift between visits, so checking local conditions prior to entry is essential. Water temperatures fluctuate between 9C and 19C throughout the year, requiring appropriate thermal protection. As facilities are not confirmed at this site, divers should arrive fully prepared with necessary equipment, including a surface marker buoy and surface cover.

LCT(A) 2428 is a shipwreck and artificial reef located off the coast of Selsey, United Kingdom. The site sits at a shallow depth of approximately 4 metres, making it accessible for beginner divers. Access to the wreck is by boat only. Divers should be prepared for moderate currents and visibility that typically averages 4 metres. Due to the nature of the wreck, hazards include potential entanglement and low visibility. The site is suitable for night diving, with typical dive durations around 30 minutes. Water temperatures at this location fluctuate between 9C in the winter months and 19C during August.

Britsum is a wreck and reef site located 1500 metres off the coast of Selsey. Divers encounter depths ranging from 20 to 40 metres, with an average depth of 30 metres. Access is by boat only, and the site features moderate currents that require careful planning around slack water. Visibility typically fluctuates between 3 and 10 metres. Due to the depth and the nature of the wreck structure, this site is suited for intermediate divers. Hazards include entanglement risks, sharp surfaces, and low visibility. A drysuit is recommended given the water temperature range of 9 to 19 degrees Celsius.

Tanks & Bulldozers is an artificial reef site located 9400m off the coast of Selsey, United Kingdom. This wreck site features submerged heavy machinery and sits at depths ranging from 15m to 22m, with an average depth of 20m. Divers should expect mild currents and visibility typically between 1m and 6m. Due to the depth and low visibility, this site is suited for intermediate divers. Access is by boat only, with a typical dive duration of 30 minutes. Water temperatures fluctuate throughout the year, ranging from 9C in late winter to 19C in August.

Cuckoo is a wreck site located 500 metres off the coast of Selsey, United Kingdom. This marine site sits at depths between 12 and 15 metres and requires boat access. Divers should anticipate moderate currents that can strengthen, necessitating careful planning around slack water. Visibility is variable, ranging from 3 to 10 metres. Due to the wreck structure, entanglement is a primary hazard, and divers are advised to carry cutting tools. Water temperatures fluctuate between 9 and 18 degrees Celsius throughout the year. The site is suited for intermediate divers who can manage buoyancy and navigation in changing conditions. The surrounding habitat supports various temperate marine life and invertebrates.