Met Éireann has predicted very heavy rain over the south of the country tonight which will spread northwards, with some resultant localised flooding.
Rain in parts of Connacht and Ulster will gradually clear away this morning to give a generally dry day apart from some well scattered showers, the meteorological service said.
There will be some bright spells too and temperatures will climb to between 10 and 13 degrees.
Very heavy rain will fall over the south of the country early tonight and spread northwards overnight. It will become windy and at times gusty, and southeast winds could reach gale force at times along the coast. The rain may lead to localised flooding and temperatures will fall to between 4 and 9 degrees, Met Éireann said.
Dublin City Council said it had closed the flood gates on the river Dodder in the Sandymount/Ringsend area as a precaution.
“High tides, combined with low atmospheric pressure and high winds over the next few days, will give rise to high sea levels and possibly large waves. There may be very localised wave overtopping in parts of Sandymount and Clontarf,” the council said.
It will monitor the situation over the next few days, and a stock of sandbags will be deployed by drainage staff if required. It will be a wet and windy start tomorrow for much of the country as the heavy rain continues to spread northwards.
The heavy rain will gradually clear the north coast later in the morning, to be replaced by some heavy and prolonged showers.
There will be further rainfall tomorrow night, mainly along coastal areas, with some heavy falls along southern and eastern coasts. Met Éireann is forecasting that Thursday will be a showery day, with heavy and possibly thundery falls but some bright spells in between.