As the weather worsens, Met Eireann has issued a warning due to heavy rainfall.
A status orange alert will be in effect early on Sunday morning for Cork, and will remain in place throughout the day. Up to 70mm of rain are expected there.
Elsewhere, Kerry, Limerick, Tipperary and Waterford will see between 25 and 50 millimetres of rainfall.
Highest temperatures will be 9-10C nationwide tomorrow.