Dalkey Island (Dublin Bay)
Site Overview
Dalkey Island sits in the clear water of Dublin Bay and is one of the most accessible and rewarding dives near the capital. Kelp forest, lobsters, wrasse, nudibranchs and frequent grey seals make it a favourite for training and recreation, with a scenic backdrop of the hill and the city. Reached by a short boat ride or shore entry from Dalkey, it blends convenience with genuine cold-water life just minutes from Dublin. The site rewards careful planning, good buoyancy and a respect for the power of the Atlantic, and remains a favourite among Irish divers. The site rewards careful planning, good buoyancy and a respect for the power of the Atlantic, and remains a favourite among Irish divers. The site rewards careful planning, good buoyancy and a respect for the power of the Atlantic, and remains a favourite among Irish divers. The site rewards careful planning, good buoyancy and a respect for the power of the Atlantic, and remains a favourite among Irish divers. The site rewards careful planning, good buoyancy and a respect for the power of the Atlantic, and remains a favourite among Irish divers. The site rewards careful planning, good buoyancy and a respect for the power of the Atlantic, and remains a favourite among Irish divers.
Dive Briefing
"Plan a shallow profile around the island, moving slowly through the kelp to spot lobsters and nudibranchs. Keep fins up to avoid entanglement, use a torch for colour, and watch for seals and boat traffic. Ascend with a safety stop and exit carefully at the slip or boat. Follow your guide closely, monitor your thermal comfort and complete a safety stop before exiting at the designated point. Follow your guide closely, monitor your thermal comfort and complete a safety stop before exiting at the designated point. Follow your guide closely, monitor your thermal comfort and complete a safety stop before exiting at the designated point. Follow your guide closely, monitor your thermal comfort and complete a safety stop before exiting at the designated point. Follow your guide closely, monitor your thermal comfort and complete a safety stop before exiting at the designated point. Follow your guide closely, monitor your thermal comfort and complete a safety stop before exiting at the designated point."
Signature Marine Life
Lobster
Homarus gammarus
Best: Year-round
Corkwing Wrasse
Symphodus melops
Best: Year-round
Grey Seal
Halichoerus grypus
Best: Year-round
Nudibranch
Aeolidiella spp.
Best: Year-round
Snakelocks Anemone
Anemonia viridis
Best: Year-round
Safety & Hazards
- Boat traffic in bay
- Mild current
- Cold water
- Limited visibility after rain
- Slippery entry
- Kelp entanglement
Traveler Notes
Who is this for?
Ideal for open-water students, refresher dives and photographers wanting an easy, wildlife-rich site near Dublin. Suits all levels in calm conditions. It suits confident cold-water divers who value dramatic scenery, wrecks and rich invertebrate life over tropical abundance. It suits confident cold-water divers who value dramatic scenery, wrecks and rich invertebrate life over tropical abundance. It suits confident cold-water divers who value dramatic scenery, wrecks and rich invertebrate life over tropical abundance. It suits confident cold-water divers who value dramatic scenery, wrecks and rich invertebrate life over tropical abundance. It suits confident cold-water divers who value dramatic scenery, wrecks and rich invertebrate life over tropical abundance.
Quick Stats
Dive Logistics
- Dublin Dive Centre
- Dalkey Charters
Photography Info
Best for: macro, wide_angle
Nearby Stay
Merrion Hotel
Dublin • 6km away
The Marker Hotel
Dublin • 8km away