Iarnród Éireann is advising passengers to double check their service is running this bank holiday weekend.
A number of line improvement works are taking place from Friday to Monday across the rail network.
The company says a number of routes and services will be affected as a result.
These will impact train and DART services across the weekend.
Services to and from Cork, Limerick and Tralee are also affected.
It is advising all customers to check their journey details prior to travelling.
Full details can be found on the Irish Rail website.