Dalkey Island
Conditions & tides
Scored by DiveConnect's site-physics model
Marine forecast via Copernicus Marine. Score is a rule-based guide from swell/wind vs. the site's exposure — always dive your own assessment.
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About this site
Dalkey Island lies at the south end of Dublin Bay, with Dalkey Sound running between the island and the mainland. The Sound is the best choice when diving on or near slack is not possible, because the tide flies through it and makes an exciting drift dive. The bottom runs from around 10 to 20 m and is mostly sand with the odd rocky outcrop, graded for Ocean Divers.
Crabs and dogfish are plentiful, and in summer the bottom is often covered in a mass of brittlestars. Currents here can reach 4 knots, with a rip off the fort point on the ebb and a flood current east of the island. Lobster pots with lines are a hazard, and it gets dark below 20 m.
Marine life here
Confirmed by our research team, reported by independent divers, or observed nearby via iNaturalist — each entry is labelled with its source.
Common Bottlenose DolphinTursiops truncatusReported here · unconfirmed
Grey SealHalichoerus grypusReported here · unconfirmed
Hammerhead sharkHammerhead sharkReported here · unconfirmed
Durable tips from divers — access, hazards, marine life, facilities. For day-of conditions, use the report tool in the conditions card above.
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