Lacken Pier in Sligo offers a rugged coastal environment featuring a series of underwater gullies and caves. This site is suitable for intermediate divers and snorkelers, with depths ranging from 1 to 9 metres. Entry is via the shore, though conditions can vary significantly, with visibility ranging from 5 to 25 metres. Divers should be aware of potential hazards including surf, surge, rip currents, and strong currents, as well as local boat traffic. Water temperatures fluctuate between 9C and 16C throughout the year. On-site facilities include parking, toilets, showers, changing rooms, and a cafe.

Poll Gorm in Sligo is a natural saltwater swimming pool featuring a man-made retaining wall that traps water as the tide recedes. This structure creates a calm environment suitable for beginners and snorkelling practice. The site is accessed from the shore and offers facilities including parking and toilets. Water temperatures at this marine site range from 9C in the winter months to 16C in August. Divers and snorkellers should be aware of potential hazards including surf and jellyfish. The site is rated 3/5 for snorkelling activities.

Aughris Pier at Rosses Point offers a shore entry via a slipway or steps into a rocky bay. This site features a mix of natural reef and artificial reef structures, suitable for beginners. Divers and snorkellers can explore the area to the right of the pier, where the shoreline rocks contain embedded Carboniferous fossils. Conditions are generally mild, with depths ranging from 1 to 7 metres and an average depth of 6 metres. Water temperatures fluctuate between 9C and 16C throughout the year. Divers should be aware of potential entanglement hazards. Facilities at the site include parking, a cafe, and access to boat charters.

Raghly Pier, located on the Raghly peninsula near Rosses Point, offers a shore entry from a stony beach. The site features a combination of reef, kelp forest, and artificial reef structures around the pier walls. It is suitable for beginners, though divers should be aware of potential surf conditions. Water temperatures in the area range from 9C to 16C throughout the year, making a wetsuit necessary for comfort. Parking is available at the site. The shallow waters around the pier provide a accessible environment for both diving and snorkelling activities.

Portacloy Beach is a horseshoe-shaped bay in Sligo, Ireland, sheltered by dramatic cliffs that provide protection from heavy Atlantic swells. This site features a combination of reef and kelp forest habitats. Diving and snorkelling take place at depths ranging from 1m to 5m, with an average depth of 2m. Access is via the shore. Conditions are variable, with visibility typically between 5m and 15m. Divers should be aware of potential hazards including surf, rip currents, and strong currents. The site is suitable for intermediate divers and offers facilities including parking, toilets, and showers. Water temperatures fluctuate between 9C and 15C throughout the year.

Clashymore is a remote snorkelling site located within a natural rocky gut on the southern side of the uninhabited Inishmurray Island. Accessible only by boat, this site is suited for advanced snorkellers due to its exposed location. The environment consists of a rocky topography typical of the Atlantic coastline. Water temperatures at the site fluctuate throughout the year, ranging from 9C in the winter months to 16C in August. As an exposed marine location, conditions can vary significantly, requiring careful planning and experience to navigate the coastal environment safely.

Deadman's Point in Rosses Point is a shore-entry site featuring a reef and cave system. Located where the estuary meets the open bay near the Sligo Yacht Club, the site offers depths ranging from 1 to 5 metres with an average of 3 metres. Divers should be prepared for cold Atlantic water temperatures between 9C and 16C. Conditions vary, with visibility typically between 3 and 10 metres. Hazards include boat traffic, surf, rip currents, and strong currents. The site is suited for intermediate divers, and facilities including parking, toilets, and showers are available. Guided tours are also offered for those exploring this rocky shoreline.

Streedagh Point in Mullaghmore offers a unique snorkelling experience across limestone ledges and fossil beds dating back 350 million years. This site features a mix of reef and wreck topography with depths ranging from 3 to 20 metres, averaging 5 metres. Access is via the shore at the northern end of Streedagh Strand. Conditions are variable, with visibility between 2 and 10 metres and water temperatures fluctuating from 9C to 16C throughout the year. Due to strong currents, rip currents, and surf, this site is suited for intermediate snorkellers. Facilities including parking and toilets are available nearby.