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.

Porth Wen Brickworks in Pembrokeshire offers a unique dive experience where industrial ruins meet the sea. The site features an old harbour area with underwater structures that function as an artificial reef. Divers should note that conditions vary, with visibility often limited and potential hazards including overhead environments and surf. The site is accessed from the shore and is best suited for intermediate divers due to the nature of the underwater ruins. Water temperatures fluctuate between 9C and 16C throughout the year. Snorkellers may also enjoy the sheltered environment of the harbour 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.

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 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.

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.

Puffin Island in Pembrokeshire offers a challenging marine environment featuring a mix of reef, kelp forest, and cave topography. Divers can explore depths ranging from 8 to 35 metres, with an average depth of 20 metres. Access is strictly by boat, as the site is located 800 metres from the shore. Conditions are variable, with strong currents and surge present, alongside visibility ranging from 5 to 15 metres. Due to the strong currents and potential for low visibility, this site is recommended for intermediate divers. Typical dive times are approximately 40 minutes. Divers should remain vigilant for boat traffic in the area.

The Hoveringham Wreck is a shallow marine dive site located in Pembrokeshire, United Kingdom. Accessible only by boat, the site features a wreck lying at a depth of 3 to 10 metres. Divers should be prepared for strong currents in this area, which can impact the dive experience. Visibility is consistently recorded at 5 metres. Water temperatures fluctuate throughout the year, ranging from a low of 8C in February and March to a high of 16C during August and September. Due to the current conditions, this site is best suited for experienced divers comfortable with moving water.