Met Éireann has today issued a yellow rainfall warning for several counties, including Cork.
The warning comes into effect from midnight on Thursday for all of Connacht, Donegal, Clare, Cork, Kerry and Limerick.
It will remain in place until 6am on Friday.
"Heavy and persistent rain overnight Wednesday through to Friday morning will lead to some flooding and disruption. "Accumulations of 30mm to 60mm are expected widely, with higher values in mountainous regions," the national forecaster has stated.
Meanwhile, Cork looks set for further showers this evening, some of which may turn heavy.
There is also a risk of hail and isolated thunderstorms.
"Lowest temperatures of 5 to 8 degrees and it will be blustery with moderate to fresh and gusty south to southwest winds, strong around the coast," Met Éireann stated.
Similar conditions are expected tomorrow.
"Tomorrow will be another blustery day with sunny spells and showers.
"Some showers will be heavy and prolonged with hail and thunder."
Highest temperatures will be between 9 and 11 degrees tomorrow.