Met Éireann forecasts "heavy thundery showers" for the weekend
The heavy rain will bring the risk of spot flooding.
While Met Éireann's early indications for early next week suggest there will be "a good deal of dry weather", the weekend before will be a wet one.
Met Éireann's forecast for the week says today (Wednesday, 18 August) will be another mostly cloudy day.
There will be patchy light rain, drizzle and mist this morning that will become confined to northern counties this afternoon, with some hazy sunshine breaking through over parts of south and west.
This is before more persistent rain moves into coastal parts of the southwest this evening as temperatures range from 16 to 20 degrees generally.
Thursday will also be predominantly cloudy with scattered outbreaks of rain and drizzle.
That said, the cloud will start to break up towards evening, allowing some late bright or sunny intervals to develop. Temperatures will range from 16 to 20 degrees.
Friday, meanwhile, will be a wet day with outbreaks of rain, turning heavy at times, especially in the south and west, with a chance of some thundery downpours.
Temperatures will be between 17 to 21 degrees in moderate winds that will feel fresh and gusty on exposed coasts.
After a mostly dull, damp or wet start to Saturday, it will brighten up from the west during the morning and afternoon, although the cloud and rain will be slow to clear in the east and will likely linger all day in some eastern coastal counties.
Heavy thundery showers will develop during the afternoon and evening, bringing a risk of spot flooding, especially in the west and southwest. Temperatures will range from 17 to 21 degrees.
However, conditions are predicated to improve from Sunday, with less heavy showers forecasted than Saturday.
Sunday looks set to be a mostly cloudy day, though some bright or sunny spells may breakthrough over the southern half of the country during the late afternoon and evening as temperatures will be between 17 to 21 degrees.
As for next week, Met Éireann says: "Early indications suggest high pressure will become more dominant early next week. There will still be a few showers about, but a good deal of dry weather too.
"Maximum daily temperatures will be up into the low 20s quite widely."