Bull Bay, or Porth Llechog, is a coastal site on the north coast of Anglesey featuring a mix of reef and wreck topography. Divers and snorkellers can explore the remains of the paddle steamer Pansy, which are scattered near the rocks on the left side of the bay. The site is accessed from the shore via a shingle and rock beach. Depths typically range from 6 to 10 metres, with an average of 8 metres. Conditions vary, with visibility ranging between 5 and 20 metres and mild currents. Hazards include boat traffic, strong currents, and surf. Facilities available at the site include parking, toilets, and a cafe.

The SS Dakota is a shipwreck located 1609 metres off the coast of Pembrokeshire, United Kingdom. Resting at depths between 10 and 20 metres, with an average depth of 15 metres, the site is suitable for intermediate divers. Access is by boat only. Divers should expect strong currents and limited visibility, typically around 5 metres, making the use of a torch recommended for viewing structural details. Planning dives around slack water is essential to manage the current. Surface intervals require vigilance due to boat traffic, and caution is advised when moving near any sharp rock formations in the area.

Ynys Moelfre is a reef site located 1000 metres offshore in Pembrokeshire, United Kingdom. The reef reaches depths of 10 to 18 metres, with an average depth of 14 metres. Divers encounter strong currents, making it suitable for intermediate skill levels; planning dives around slack water is essential. Visibility typically ranges from 5 to 10 metres. Marine life recorded at the site includes curled octopus, grey seals, squat lobsters, various crabs, brittle stars, common sea stars, and dead man's fingers. Water temperatures fluctuate between 8C and 16C throughout the year. Boat access is required to reach the site, and local facilities include parking, toilets, showers, and a dive shop.

The Chasms is a reef and drift dive site located off the coast of Pembrokeshire. Divers typically explore the reef at a consistent depth of 12 metres, though the seabed drops to 27 metres, requiring careful depth monitoring. Access is by boat only, and the site experiences moderate currents, making slack water timing essential for a safe dive. Visibility at this location ranges from 3 to 6 metres. Due to active boat traffic at the surface, the use of a surface marker buoy is strongly recommended for all ascents. Water temperatures fluctuate between 9 and 16 degrees Celsius, necessitating appropriate thermal protection such as a drysuit or thick wetsuit.

Newry Beach in Pembrokeshire offers a shore-entry dive featuring a transition from sandy shallows to rocky reef and kelp forest environments. Divers typically explore depths between 3 and 10 metres, with an average depth of 6 metres. Conditions are generally mild, with visibility ranging from 5 to 15 metres. The site is suitable for beginners and supports night diving. Species recorded around this area include gray seals, catsharks, common lobsters, various crabs, and jellyfish. Facilities at the site include parking, toilets, showers, changing rooms, and access to air fills and guided tours.

The Flint Wreck is an accessible wreck site located in Pembrokeshire, United Kingdom, resting at an average depth of 9 metres. With a depth range of 8 to 10 metres, it is suitable for beginner divers and snorkellers. The site allows for both shore and boat entries. Visibility typically ranges between 5 and 10 metres. Divers should be aware of moderate currents and the presence of sharp edges on the wreck structure and surrounding rocks. Thick gloves are recommended for protection. Water temperatures fluctuate between 9C and 16C throughout the year, necessitating appropriate thermal protection such as a drysuit or thick wetsuit.

North Stack is a boat-access site located off the north-west tip of Anglesey, Pembrokeshire. The topography consists of a mix of reef, wreck, and drop-off features at depths between 10 and 20 metres. Divers should expect strong currents and limited visibility of approximately 5 metres, requiring careful navigation. Due to the challenging conditions, including boat traffic and surf, this site is suitable for intermediate divers. Water temperatures fluctuate between 9 and 16 degrees Celsius throughout the year, necessitating appropriate thermal protection. Divers must cross-reference tide tables with local skipper knowledge to time dives correctly and should deploy a delayed surface marker buoy during ascent.

Trearddurr Bay in Pembrokeshire offers a shore-entry dive site featuring a mix of reef and wreck topography. Divers can explore rocky structures and nooks at depths ranging from 5 to 15 metres, with an average depth of 10 metres. Conditions vary, with visibility typically between 5 and 15 metres and moderate currents. The site is suitable for intermediate divers, with typical dives lasting around 45 minutes. Night diving is permitted. Hazards include boat traffic, potential entanglement, strong currents, and surf. Facilities available at the site include parking, toilets, a cafe, and a dive shop.