The forum, which is expected to focus on globalisation, sovereignty and security issues, will be addressed by former European commissioner for external affairs Chris Patten.
At the forum, Sanader will give a talk about how a small country that only launched EU membership talks saw the future of the EU.
On the last day of his visit the Croatian PM is scheduled to meet top Irish officials. Sanader and Ahern are also expected to plant a tree on the occasion of National Forest Week