Although it will be a mainly dry and sunny day today, showers will descend upon eastern and coastal counties, according to Met Éireann.
Temperatures will reach 9 to 11 degrees with fresh easterly winds. It will be breezy tonight with outbreaks of rain and drizzle set to spread to southern coastal areas.
Elsewhere, it will be mainly dry with clear spells and isolated showers; temperatures will drop between 1 to 4 degrees in midland and northern counties, but will range from 5 to 8 degrees elsewhere.
Wednesday – Rain will spread across Munster before extending north and east-wards; it will reach south Leinster and south Connacht in the afternoon and the entire country in the evening.
Rain will turn heavy in southern coastal counties, Met Éireann has warned. Temperatures will range from 10 to 13 degrees, with minimum temperatures of 6 to 10 degrees at night.
It will be breezy and wet on tomorrow night, with outbreaks of rain expected.
Thursday – It looks set to be mostly cloudy with widespread showers – some of which will be heavy.
The national forecaster has said that persistent rain will develop in the south during the evening with highs of 12 to 15 degrees.
It will be dry for a period in northern areas early in the night, although, rain in the south will extend to all areas.
Friday – It will be mostly cloudy, with rain in the north set to clear in the morning, giving rise to a dry period, according to Met Éireann.
Rain will move in from the Atlantic during the day; temperatures will reach between 12 to 16 degrees.
Rain will give way to scattered showers overnight with lows of 6 to 9 degrees.