Storm Lorenzo is expected to bring winds of up to 130 kilometres an hour to some western coastal counties later.
Galway, Mayo, Clare, Cork, Kerry and Limerick are forecast to be worst affected, with a status orange warning in effect in those areas from this evening.
A Status Yellow warning for wind and rain will also take effect nationally from 9 this morning.
Damaging gusts and heavy rain are expected over the course of the day with coastal flooding likely in places.
The worst of the conditions will be along the western seaboard as storm Lorenzo sweeps in.
Starting off dry today but turning wet and windy during the morning with gales along the coast. Very high seas are expected along the Atlantic coast as storm Lorenzo approaches. Highest temperatures of 15 to 19 degrees. During the evening winds will veer west to..... pic.twitter.com/wxuhTPdfBc
— Met Éireann (@MetEireann) October 3, 2019
People are being told to keep up-to-date with their local authority.
Airports are warning passengers to check for any flight disruption before travelling to the airport.
Schools are also being advised to err on the side of caution when deciding whether or not to open.
The National Emergency Co-Ordination Group is meeting later to discuss last minute preparations for Storm Lorenzo.