The Axwell is a wreck site located off the coast of Selsey, suitable only for advanced divers due to its depth and challenging conditions. The wreck lies at depths reaching 45 metres. Divers must contend with strong, unpredictable currents and visibility that fluctuates significantly between 1 and 20 metres. Access is by boat only, and the site requires careful planning around slack water to ensure a manageable dive. Given the depth and potential for entanglement within the wreck structure, this site demands high levels of experience. Water temperatures range from 9°C to 18°C, making a drysuit the recommended choice for year-round diving.

Gascogny is a wreck dive located off the coast of Selsey, United Kingdom, suitable for intermediate divers. The site reaches depths between 22 and 30 metres, with an average depth of 25 metres. Access is by boat only. Divers should expect variable visibility ranging from 5 to 7 metres, necessitating the use of a dive light. Water temperatures fluctuate between 9 and 18 degrees Celsius throughout the year. Due to the nature of the wreck structure, divers must maintain buoyancy control to avoid entanglement. Conditions, including current and visibility, can shift significantly, so local checks are recommended before diving.

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.

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.

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.

Selsey East Beach is a shore-entry site featuring a mix of reef and artificial reef structures. Located within a Marine Conservation Zone, the topography includes peat and clay exposures. Divers and snorkellers can expect depths between 5 and 10 metres, with an average of 7 metres. The site is suitable for intermediate divers due to strong currents and variable visibility of 5 to 10 metres. Water temperatures range from 9C to 19C throughout the year. The area supports a variety of temperate marine life and invertebrates typical of the region. Facilities include parking, toilets, showers, a cafe, and local dive shops for equipment rental.

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.