Lundy Island offers a diverse range of over 40 dive sites, including reefs, wrecks, walls, and pinnacles. Located 18.5 kilometres from the shore, the site requires boat access and is suitable for intermediate divers. The topography features drop-offs and drift diving opportunities with depths ranging from 4 to 40 metres, averaging 12 metres. Conditions are variable, with strong currents and visibility between 6 and 12 metres. Water temperatures fluctuate between 9C and 16C throughout the year. Divers should be aware of hazards including boat traffic, surf, and low visibility. Facilities available on the island include air fills, changing rooms, and toilets.

Halfway Wall Bay is a reef and wall dive site located at Lundy Island. The site is accessible only by boat and is suited for intermediate divers due to the presence of strong currents and surf. Water temperatures at this location vary throughout the year, ranging from 9C in the late winter and early spring to 17C during the summer months. Given the exposed nature of the site and the potential for challenging water movement, divers should be prepared for variable conditions. The topography consists of a wall and reef structure, providing a distinct underwater environment for those visiting this part of the United Kingdom.

Tibbetts Point is a shallow reef site located at Lundy Island, United Kingdom. The site is characterised by a very shallow average depth of approximately two metres. Access is via a shore entry. Divers should be aware of the potential for strong currents and surf at this location. Due to the nature of the environment, hazards include cold water and the presence of sea urchins. This site is suitable for beginners, though conditions can vary. There is no specific marine life data available for this location.

Landing Bay at Lundy Island is a sheltered reef site located within a Marine Conservation Zone. Suitable for beginners, the site offers depths ranging from 1 to 9 metres with an average of 5 metres. Snorkellers can access the water via shore or boat. Visibility typically ranges between 5 and 8 metres, with mild currents. Water temperatures are cool, fluctuating between 9C and 17C throughout the year, necessitating the use of thicker wetsuits. Hazards at this location include boat traffic and the presence of jellyfish. Facilities available at the island include equipment rental, a cafe, and boat charter services.

Brazen Ward is a reef site located 200 metres from the shore of Lundy Island. Divers access this site by boat, which is required due to the strong currents present in the area. The site features depths ranging from 5 to 15 metres, with an average depth of 10 metres. Visibility at the site typically ranges between 10 and 30 metres. Given the strong currents, boat traffic, and cold water temperatures, which fluctuate between 9C and 17C throughout the year, this site is best suited for intermediate divers. Facilities available include air fills and guided tours.

The HMS Montague is a historic wreck located 100 metres off Lundy Island. Resting at depths between 9 and 15 metres, the site is a challenging dive suited to intermediate divers. The wreck presents an overhead environment with significant entanglement risks, compounded by strong currents and surge. Visibility is highly variable and can be extremely low, often requiring navigation by feel rather than sight. Access is by boat only, and divers must time their entry carefully around slack water to manage the powerful tidal currents. Water temperatures fluctuate between 9C and 17C throughout the year, necessitating appropriate thermal protection.

Knoll Pins is a reef site located at Lundy Island, United Kingdom, accessible exclusively by boat. The site features depths ranging from 18 to 25 metres, requiring solid buoyancy control for those exploring the deeper sections of the reef. Visibility at the site is variable, typically ranging between 10 and 30 metres, which allows for clear observation of the reef structure. Water temperatures are cool, fluctuating between 9 and 16 degrees Celsius throughout the year. Due to the variable nature of the currents, divers should consult with local operators regarding conditions before planning a dive. A drysuit or a thick wetsuit of at least 7mm is recommended for thermal comfort.

Gannet's Bay is a reef dive site located at Lundy Island, offering depths ranging from 1 to 30 metres. This site is accessible only by boat and is suitable for divers of all skill levels. Conditions are generally mild, with visibility fluctuating between 5 and 30 metres. Water temperatures vary throughout the year, ranging from 9C in the late winter and early spring to 16C in the autumn. Divers should remain aware of boat traffic in the area and prepare for cold water temperatures. The site provides a varied underwater topography typical of the region, suitable for those seeking a range of depths.