Leabgarrow Bay on Arranmore Island is a sheltered site forming part of Ireland's first Island Blueway. The topography consists of reefs and kelp forests accessible from the pier. Conditions are generally suitable for beginners, with mild currents and water temperatures ranging from 9C in winter to 16C in August. The site offers both shore and boat entry options. Facilities at the location include parking, toilets, showers, changing rooms, a rinse station, and a cafe. Divers and snorkellers can also access air fills, equipment rental, gear storage, boat charters, and guided tours through the local dive shop.

Marble Hill in Mulroy Bay, Ireland, features a reef environment characterised by rock outcrops at the eastern end of the beach. This site is suitable for beginners, offering a shallow average depth of 3 metres with a range of 1 to 5 metres. Snorkellers can expect mild currents and visibility ranging from 3 to 15 metres. Access is via the shore, with facilities including parking, toilets, and showers available. Water temperatures fluctuate between 9C and 15C throughout the year, necessitating appropriate thermal protection. Hazards at this location include sea urchins and sharp coral. Typical sessions last approximately 45 minutes.

Portnablagh in Mulroy Bay offers a shore-entry dive featuring a kelp forest, reef structures, and a cave. Suitable for beginners, the site ranges from 2 to 12 metres in depth with an average of 7 metres. Visibility typically spans 5 to 15 metres. Divers should be aware of mild currents and potential surge or swell near the rocky shoreline. Water temperatures fluctuate between 9 and 15 degrees Celsius, necessitating appropriate thermal protection. Parking is available directly at the site, facilitating easy preparation. Night diving is possible when conditions permit, with typical dive times around 45 minutes.

Horn Head in Mulroy Bay offers a diverse underwater landscape featuring reefs, kelp forests, and cave systems. Divers can explore depths ranging from 5 to 30 metres, with an average depth of 15 metres. The site is subject to moderate currents, surge, and surf, requiring boat access and careful planning around slack water. Visibility is highly variable, fluctuating between 5 and 30 metres. Due to water temperatures between 9 and 15 degrees Celsius and potential surge, a drysuit is recommended. Divers should maintain close contact with their guide and carry a surface marker buoy to manage the changing conditions.

Fintra Beach in South Donegal offers a shallow reef environment suitable for beginners. Divers and snorkellers can explore the rocky point at the western end of the beach, which leads into a sheltered bay. At high tide, the area features interconnected rock pools and lagoons. Depths range from 1 to 5 metres, with an average of 3 metres. Access is via the shore, and conditions typically feature mild currents. Water temperatures fluctuate between 9C and 16C throughout the year. Facilities available at the site include parking, toilets, and a cafe. Typical dives last approximately 60 minutes.

Melmore Head in Mulroy Bay offers a challenging marine environment defined by dramatic rock walls, underwater gullies, and steep drop-offs. Divers can expect depths ranging from 10 to 30 metres, with an average of 20 metres. The site is subject to strong currents and surge, making it suitable for advanced divers only. Entry is possible via both shore and boat. Visibility typically ranges between 10 and 20 metres. The habitat supports a variety of temperate marine life, including various reef fish and invertebrates common to the region. Facilities at the site include parking, and a typical dive duration is approximately 40 minutes.

Malin Beg Harbour in South Donegal is a sheltered natural harbour featuring a central sea stack. The site consists of reef and artificial reef structures, offering a protected environment suitable for beginners. Divers and snorkellers can expect depths ranging from 2 to 10 metres, with an average depth of 6 metres. Visibility typically spans 8 to 15 metres. Entry is via the shore, and the site is accessible for night diving. Water temperatures fluctuate between 9C and 16C throughout the year. Hazards include the presence of jellyfish and potential surf. Parking and a cafe are available for visitors.

Carrigan Head in South Donegal, Ireland, features a reef and wall topography. The site is accessed by boat and is suitable for intermediate divers. Dives typically last around 40 minutes at an average depth of 12 metres. Conditions at the site vary, with visibility ranging from 8 to 15 metres and currents described as mild. Water temperatures fluctuate between 9C and 16C throughout the year. Due to the nature of the environment, divers should be prepared for cold water, potential surf, and variable visibility. This site offers a specific underwater profile for those experienced in boat-based coastal diving.