Grey Point Fort in Strangford Lough offers a rugged snorkeling experience characterised by deep gullies and large boulders along the rocky shoreline. The site provides access to deeper water close to the shore, suitable for intermediate snorkelers. Conditions vary, with water temperatures ranging from 8C to 15C throughout the year. Snorkelers should be aware of potential hazards including boat traffic, jellyfish, surf, and periods of low visibility. Species recorded around this area include catsharks, wrasses, various crabs, lobsters, and sea stars. Parking is available at the site, and guided tours can be arranged for those exploring the area.

Helen's Bay Beach in Strangford Lough is a gently shelving sandy beach that offers accessible shore entry for snorkelers. The site is particularly suited to beginners, with the rocky headlands located at either end of the beach providing the primary areas for exploration. Water temperatures at this marine site fluctuate between 8C and 15C throughout the year. Due to the nature of the terrain, snorkelers should be prepared for varying conditions typical of the region. The site is well-regarded for its water quality, making it a practical choice for those looking to practice snorkeling in a sheltered coastal environment.

Blackhead Path is a shore-entry site in Strangford Lough featuring a rocky shoreline that transitions into boulder slopes, kelp forests, and cave structures. Divers can expect depths ranging from 5 to 18 metres, with an average depth of 12 metres. Conditions are variable, with moderate currents and visibility typically between 3 and 8 metres. The water is cold throughout the year, ranging from 8C to 14C, necessitating a suitable exposure suit. The site is suitable for intermediate divers and offers a 4/5 rating for snorkelling. Facilities available include parking, toilets, showers, changing rooms, a rinse station, air fills, a dive shop, and boat charter services. Surf may be present at the entry point.

Coastguard Boat House Slipway in Strangford Lough offers a diverse underwater environment featuring rocky reefs, wreck remains, and artificial reef structures. This shore-entry site is suitable for beginners, though divers and snorkellers should remain aware of moderate currents and local boat traffic. Water temperatures fluctuate between 8C and 14C throughout the year. The site provides convenient facilities including parking, changing rooms, toilets, showers, and a rinse station. Air fills and guided tours are available for those requiring support. The slipway and adjacent beach area provide easy access to the water for exploring the varied coastal topography.

Swineley Bay in Strangford Lough offers a shore-entry snorkelling experience featuring a combination of reef and kelp forest habitats. The site is accessed via a coastal path and provides facilities including parking, toilets, showers, changing rooms, and a cafe. Water temperatures at this location vary between 8C and 15C throughout the year. Due to the nature of the terrain and the environment, this site is best suited for intermediate-level snorkellers. The bay is noted for its peaceful conditions and is rated 4/5 for snorkelling activities.

Smelt Mill Bay is a pebble beach cove located at the base of Strickland's Glen in Strangford Lough. This site features rock formations and gullies suitable for snorkeling. The area is accessible via shore entry and is generally suited for beginners. Depths range from 1 metre to 10 metres, with an average depth of 5 metres. Conditions include mild currents and water temperatures varying between 8C and 15C throughout the year. Divers and snorkellers should remain aware of potential boat traffic and surf conditions in the area. Parking is available for visitors.

Blackhead Caves, located at the southern base of Islandmagee, offer a shallow dive experience consisting of rocky reefs and sea caves. The site is suitable for intermediate divers, with depths ranging from 1 to 10 metres and an average depth of 5 metres. Access is via a shore entry. Divers should be prepared for moderate currents and surge, as well as potential hazards including entanglement, low visibility, and the overhead environment of the caves. Visibility at the site varies between 5 and 20 metres. Water temperatures fluctuate between 8C and 14C throughout the year. Parking is available for visitors.

Jenny Watts Cove in Strangford Lough is a sheltered reef site suitable for beginners. Divers and snorkellers access the water via a slipway or a set of steps with a handrail that leads into a rocky gully. Conditions are generally mild, though visitors should be aware of surge, boat traffic, and cold water temperatures ranging from 8C to 15C. Marine life recorded at the site includes very common sea squirts and snails. Divers may also encounter uncommon sea slugs, barnacle-eating dorids, crabs, common sea stars, grey sea slugs, rock crabs, and European green crabs. Rare sightings include wrasses, tompot blennies, sea stars, and brittle stars. Facilities include parking, toilets, showers, and changing rooms.