Larrybane Bay is a coastal site located near the Carrick-a-Rede rope bridge in Strangford Lough. The topography is defined by dramatic white limestone cliffs that frame the bay. Snorkellers can explore the area, which features submerged caves. Access to the water is via the shore. Conditions at this site vary, with water temperatures ranging from 8C to 14C throughout the year. Due to the nature of the terrain and the environment, this site is best suited for intermediate-level snorkellers.

Coastguard Hut Cliffs in Strangford Lough features a limestone baserock topography characterised by a series of small caves and crevices. This shallow site is suitable for beginners, with depths ranging from 0 to 10 metres and an average depth of 5 metres. Divers access the site via a shore entry. Conditions include mild currents and visibility typically between 3 and 10 metres. Water temperatures fluctuate between 8C and 14C throughout the year. Hazards at this location include sea urchins and sharp coral. A typical dive duration is 45 minutes, and the site is also suitable for snorkelling.

Ballycastle Beach is a shallow site located in Strangford Lough, featuring a mix of reef and seagrass habitats. With an average depth of 3 metres, it provides a sheltered entry point directly adjacent to the marina pier. The site is suitable for beginners and those practising basic skills, offering shore access with mild currents. Divers and snorkellers should be prepared for cold water temperatures ranging from 8C to 14C throughout the year. Hazards at this location include cold water, potential entanglement, low visibility, and surf. Facilities available at the site include parking, toilets, showers, changing rooms, a rinse station, air fills, a cafe, a dive shop, and boat charter services.

Coastguard Hut is a shallow reef site located below the cliffs at the western end of Ballycastle. The topography is defined by limestone bedrock, which creates a bright underwater environment. Divers can expect depths ranging from 0 to 10 metres, with an average depth of 5 metres. Access is possible via both shore and boat entries. Conditions at this site vary, with visibility typically between 5 and 15 metres. Due to the presence of strong currents, rip currents, and surf, this site is suited for intermediate divers. Facilities available at the location include parking, toilets, and a cafe.

Ballintoy Harbour offers a varied snorkelling environment featuring a combination of sandy patches and rocky reefs. The seabed is characterised by kelp-covered rock formations and submerged gullies, particularly in the area west of the harbour wall. This site is accessed via a shore entry. Water temperatures at this location fluctuate between 8C and 14C throughout the year. Due to the nature of the rocky terrain and variable conditions, this site is best suited to those comfortable with shore-based entries in a temperate marine environment.

Pans Rock is a rocky outcrop situated at the eastern end of Ballycastle Beach in Strangford Lough. Accessible via a wooden footbridge, the site features a series of gullies and rock pools. It is best explored at high tide when the water covers the inner reefs. The site is suitable for intermediate divers and snorkellers, with depths ranging from 0 to 2 metres and an average depth of 1 metre. Entry is from the shore, though visitors should be aware of strong currents and surf conditions. Parking is available nearby for convenience.

Elephant Rock is a volcanic stack located west of Ballintoy Harbour, featuring a nearby limestone arch. The underwater topography consists of dramatic rock walls and deep crevices. This site is suitable for advanced divers and snorkellers due to strong currents, rip currents, and potential surf. Access is via the shore, with depths ranging from 0 to 10 metres and an average depth of 5 metres. Water temperatures remain cool, fluctuating between 8C and 14C throughout the year, necessitating appropriate thermal protection. Divers should be aware of entanglement hazards in this environment. Parking and a cafe are available near the site.

Portbraddan, located at the western end of White Park Bay, provides shore access to rocky outcrops and kelp-covered reefs. This site is suitable for intermediate divers and snorkellers, with depths starting at 4 metres. The area is generally sheltered compared to nearby open beaches, though surf can be a hazard. Water temperatures range from 8C to 14C throughout the year. Parking is available for visitors. The site is well-suited for exploratory snorkelling along the shoreline, where the rocky topography supports a kelp forest environment.