Elly Bay is a sheltered site on the Mullet Peninsula in Ireland, offering a mix of reef, seagrass, and artificial reef habitats. This shore-entry location is suitable for beginners, with depths ranging from 1 to 5 metres and an average depth of 3 metres. The eastern side of the bay is particularly calm, providing mild current conditions for both divers and snorkellers. Water temperatures fluctuate between 9C and 16C throughout the year. The site features sandy bottoms and seagrass patches, which support a variety of temperate marine life and invertebrates typical of the region. Facilities at the site include parking, toilets, showers, and first aid.

Inishkea South is a remote island site located 3000 metres from the shore in Ireland. The topography features white sands and a bay near an abandoned village, which serves as a sanctuary for a seal colony. Divers and snorkellers can expect depths starting from 3 metres, with visibility ranging between 5 and 15 metres. Conditions are variable, with moderate currents and potential surf hazards. The site is suitable for intermediate divers and offers excellent snorkelling opportunities. Marine life in this habitat includes various temperate reef fish and invertebrates. Guided tours are available for those visiting this exposed coastal location.

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.

Silver Strand at Dugort is a reef site located on the north side of Achill Island, facing Blacksod Bay. This shore-entry location is suitable for beginners, though the water is cool, ranging from 9C to 16C throughout the year. Snorkellers should exercise caution due to potential rip currents, strong currents, and surf conditions. The site is part of a coastal trail that extends toward Golden Strand, passing near seal caves and bird colonies. Typical sessions last around 60 minutes. Due to the cool water temperatures, appropriate thermal protection is necessary to prevent heat loss during extended exposure.

Clare Island Main Harbour features rocky reefs and kelp forests accessible from both shore and boat. The site is suited for intermediate snorkelers who should be prepared for cold water temperatures ranging from 9C to 16C throughout the year. The topography includes rocky structures near the harbour and Granuaile's Castle. Snorkelers should remain vigilant regarding boat traffic and potential surf conditions. The habitat supports a variety of temperate marine life, including various reef fish and invertebrates typical of the region. Due to the variable conditions and cold water, appropriate thermal protection is recommended for all in-water activities.

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.