A Status Yellow weather alert has been issued as Dublin is set to be lashed with heavy rain.
Met Eireann has also warned of spot flooding with “spells of heavy rain at times”.
The warning is in place from 6 pm this evening to 9 pm tomorrow night for Dublin, Kildare, Louth, Wicklow, and Meath.
Along with the weather warning, the national forecast is also predicting subzero temperatures this week.
Temperatures are set to plunge to as low as -3C on Thursday night.
A Met Eireann forecaster said: “Thursday night: Dry in most areas, with clear intervals, but a few scattered showers will occur, mainly along north and east facing coasts.
“Cold, with frost and a risk of icy patches. Fog patches also, as winds slacken. Min. -3C to plus 2C. "
While there is no further forecast for Dublin, the national outlook says the rest of the week will be cold with “below normal temperatures”.
They added: “Friday: Frost and fog will clear gradually and Friday will be mainly dry and bright with sunny spells, but fog may linger in sheltered places. Max. 6C to 10C, in light variable breezes.
“Becoming breezy on Friday night, with rain extending from the Atlantic, accompanied by freshening southerly winds.
“Cold at first in the east, with a risk of a slight frost, but generally frost free.
"Saturday: Rain will clear into the Irish Sea in the early morning and it will brighten up, with sunny spells developing.
"Scattered showers also, most of them in the western half of the country, some heavy, especially in Atlantic coastal areas where there is a risk of hail and thunder.
"Max. 7C to 10C, in moderate westerly breezes, falling light later. Saturday night will be mostly dry, but cold, with frost and fog. Minimum temperatures -2C to plus 2C."
