Rostrevor Slipway is an artificial reef site located in Strangford Lough, providing a shore entry point near the pier. The site is suitable for beginners, with depths ranging from 1 to 9 metres and an average depth of 5 metres. Snorkellers should be aware of mild currents, potential surf, and strong currents in the area. Water temperatures fluctuate between 8C and 15C throughout the year. Facilities available at the site include parking, toilets, and guided tours. Typical sessions last around 30 minutes. The site is frequently used by the local sea swimming community and offers a sheltered environment compared to the lough entrance.

The Secret Beach at Ross Monument Cove is a secluded rocky cove in Strangford Lough, offering a quiet shore-entry snorkeling experience. The site features rocky outcrops that provide habitat for various reef fish and invertebrates. Water temperatures range from 8C to 15C throughout the year, and conditions generally feature mild currents. This site is suitable for beginners, though snorkelers should remain aware of boat traffic in the area. Facilities including parking and toilets are available nearby. A typical session lasts approximately 45 minutes.

The Blockhouse is a boat-access site situated at the mouth of Strangford Lough. The topography consists of a submerged bedrock shelf combined with artificial reef structures, including the ruins of a 17th-century fort. Divers can expect depths ranging from 5 to 22 metres, with an average depth of 12 metres. Conditions are variable, featuring strong currents that necessitate careful planning around slack tide. Visibility typically ranges between 5 and 10 metres. Due to the strong currents and boat traffic in the area, this site is recommended for intermediate divers. Water temperatures are cool, ranging from 8 to 15C throughout the year, requiring appropriate thermal protection to mitigate the risk of hypothermia.

Greer's Quay is an artificial reef site located in Strangford Lough, consisting of an isolated stone pier that serves as a shore entry point. The topography features a silty seabed supporting a diverse range of marine life typical of the region, including various invertebrates and fish species. Divers should be prepared for depths ranging from 2 to 9 metres, with an average depth of 4 metres. The site is suited for intermediate divers due to the presence of strong currents and potential surf conditions. A typical dive duration is approximately 50 minutes. Water temperatures fluctuate between 8C and 15C throughout the year.

Warrenpoint Seaview Steps in Strangford Lough offers shore access via metal steps, which are best utilised at high tide. This site features a combination of artificial reef structures, including pier supports and sea walls, alongside natural reef elements. Depths range from 1 to 10 metres, with an average of 4 metres. Conditions vary, and snorkellers should be aware of potential hazards including boat traffic, entanglement risks, low visibility, and strong currents. The site is suitable for beginners, though the current is generally mild. Facilities available at the location include parking, a cafe, toilets, showers, changing rooms, and a rinse station.

Omeath Pier is a sheltered shore-entry site located on the southwestern shore of Strangford Lough. The site features a mix of reef and artificial reef structures, with a bottom composition primarily consisting of mud and sand. Depths are shallow, ranging from 1 to 4 metres with an average of 2 metres. Conditions are generally calm with mild currents and visibility typically between 3 and 8 metres. This site is suitable for beginners and offers a snorkel rating of 2 out of 5. The habitat supports a variety of temperate marine life, including reef fish and invertebrates typical of the region.

Killowen Point is situated on the northern shore of Carlingford Lough within a Marine Conservation Zone. The site is notable for its rare muddy habitats, which provide an environment for sea pens in relatively shallow water. Snorkellers can access the site from either the shore or by boat. Conditions vary throughout the year, with water temperatures ranging from 8C in March to 15C between July and September. This site is suited for intermediate snorkellers. The habitat supports a variety of temperate marine life, including various invertebrates and fish species typical of the region.

Greenore Shore on the East Coast of Ireland is a shore-entry reef site characterised by a silty, cobbled slope. The site is suitable for intermediate divers and snorkellers, though conditions vary. Water temperatures range from 8C in late winter to 16C in August. Divers should be aware of moderate currents, potential low visibility, and local boat traffic. Facilities located nearby include parking, a cafe, and a dive shop. The site offers a practical entry point for those exploring the local marine environment, though users must remain vigilant regarding the changing conditions and maritime activity in the area.