Two people died in the triathlon when they got into difficulty in the water.
44-year-old Meath man Brendan Wall, who lived in the UK, and 65-year-old Ivan Chittenden from Toronto in Canada, lost their lives.
Post mortems on the bodies of the two men are taking place today.
Finance Minister Michael McGrath today expressed his sadness at the deaths of two men at the Ironman event in Youghal yesterday.
He said "Our thoughts and prayers are with the families who must be in a terrible state of shock and mourning at this time."
One of those who took part yesterday, Keith O'Sullivan, thinks the swim should have been cancelled:
