Met Éireann has expanded a status yellow weather warning that begins on Thursday evening.
It concerns 13 counties from the south-west extending across to the east coast.
Persistent and sometimes heavy rain is expected from 6 o'clock tomorrow evening until the same time on Friday.
Met Éireann says these downpours may lead to localised flooding, poor visibility and difficult travelling conditions.
TD Calls For The Government To Get A Move On With South-Wicklow Greenway
Wicklow Councillors Demand €15m In Emergency Funding For Storm-Damaged Roads
Wicklow Hurlers Dominate Fermanagh To Ramp Up Promotion Hopes
Survey Shows Wicklow Families Want The Right To Deliver A Funeral Eulogy
Bray Vet Helps Reunite Wandering Pup with Owners