Dalkey Island (Irish: Deilginis meaning "thorny island") is an uninhabited island about 16 km (10 miles) south of Dublin, near the village of Dalkey, 3 km (2 mi) south of Dún Laoghaire harbour in Ireland. Its name is a meld of the Irish deilg ("thorn") and the Old Norse ey ("island").
The waters around Dalkey Island are much used for sailing, angling and diving. Rocks known as Maiden or Carraig Rock, Clare Rock and Lamb Island all to the northwest form part of the ridge of the Island. Parts of these rocks are only visible at low tide. The southern end of the Island is a favorite with kayakers especially on the flooding tide. There can be a substantial overfall here and in a south east wind can be extremely challenging for the kayaker. When kayaking around the Island on a flood tide it is easier to go in an anti clockwise direction.
Open Water Swimming
- It was the site of the first recorded 9 km sea swim in Ireland from Dalkey Island to Bray Head Hotel.
- The Dalkey Island Swim is a 2.4 km open water swim around Dalkey Island in Ireland, organized by Ger Kennedy.