A Status Orange Warning for rain in parts of the South-East has been extended until midday.
Met Eireann says additional accumulations can be expected in Waterford, Wexford and Wicklow, with flooding in places.
A Yellow alert for Carlow, Kildare, Kilkenny and Cork has also been extended until midday.
The rain will clear later this morning and will be followed by scattered showers, with some sunny spells developing in the afternoon.
Temperatures this afternoon will also reach 14 or 15 degrees, and there will be a light to moderate southerly breeze.