Storm-force gales and heavy rain are expected to batter several parts of the country tomorrow.
Met Éireann this evening issued a severe weather and gale alert as a deep depression approached Ireland from the mid Atlantic.
The forecaster said a combination of high winds, heavy rainfall and abnormally low pressure will cause dangerous conditions in south Munster and east Leinster from early tomorrow.
Gale to strong gale force easterly winds of up to 110km/h are expected across the country.
Up to 50mm of rain is expected to fall in southern parts tomorrow, with higher totals possible in mountainous areas, with a high risk of coastal and river flooding.
Meteorologist Vincent O'Shea said most of the country would experience “very inclement weather tomorrow”.
The heaviest rain and strongest winds would occur in Cork, Waterford and parts of Kerry, he said.
Mr O'Shea said the strong winds were likely to generate a big sea swell of up to seven metres on the south coast which was likely to cause flooding in some parts.
The Coast Guard has strongly advised the public not to go out on exposed coasts, cliffs, piers or harbour walls during the inclement weather, warning that high waves can pose hazards to anyone close to the shoreline.
Irish Coast Guard manager Declan Geoghegan said: "Do not attempt to cross at fast running river or flood water fords as they may be stronger and deeper than you think.
“Flooded urban areas may contain many hazards, not least of which include submerged open manholes and downed power lines."
"The combination of tides, forecasted gale warnings for the next day or so, high sea conditions and swollen rivers may result in very dangerous conditions,” he said.
