Wet and rather windy conditions in the south-west of the country will gradually extend countrywide throughout the day, according to Met Éireann.
There is a risk of thunder, with brighter intervals expected in the afternoon with some heavy and possibly thundery showers; top temperatures of 16 to 19 degrees.
There is a risk of spot flooding tonight, as slow-moving thundery showers are set to feed up in a southerly flow overnight with lows of 10 to 13 degrees.
Tuesday — Heavy, slow-moving showers are expected in the north and east, although it will be brighter and drier elsewhere with highs of 10 to 13 degrees.
Outbreaks of rain will move from the south-west of Munster into other areas during the day, with some heavy falls expected across southern counties; temperatures will reach between 16 to 19 degrees.
Tuesday night will see a few residual patches of light rain and drizzle, with variable cloud and clear spells.
Wednesday — A largely dry is in store, although it will be rather cloudy through much of the midlands, north and east, according to Met Éireann.
Generally dull and cloudy conditions in western and south-western counties with patchy rain and drizzle becoming more persistent as the day progresses.
Heavy rain is expected in Atlantic coastal counties on Wednesday evening and this will spread countrywide on Wednesday night; lows of 11 to 13 degrees.
Thursday — Met Éireann predicts that it will be a breezy day with a mix of sunshine showers; top temperatures of 15 to 18 degrees.
Showers may be heavy with a risk of thunder, most frequent in the west and north-west.
Friday — Current indications suggest that Friday will be rather cool, blustery and showery, although it may be mainly dry in the east and south at first with some sunshine.
Showers are expected in the west and north and these will become more widespread by the afternoon, some heavy and possibly thundery, especially in Connacht and west Ulster.