A status yellow rainfall warning has been issued by Met Eireann for parts of the country today until eight o’clock this evening.
Leinster, Cavan and Monaghan are at risk of receiveing localised totals of 20 to 25mm this afternoon from slow-moving heavy, thundery downpours.
Widespread heavy, thundery showers are forecast for this afternoon and early evening, heaviest and most frequent over the eastern half of the country with a risk of localised flooding.
There will be some bright or sunny spells too, while in the west, showers will gradually die out in the late afternoon.
Highest temperatures today will range between 15 to 18 degrees in moderate west to northwesterly winds, but gusty along the Atlantic coast and near heavy showers.
Tonight is forecast to be mostly dry but rather cloudy with just isolated showers with some mist and fog patches developing.
Lowest temperatures tonight will range between 9 to 12 degrees in light northwesterly breezes.
According to Met Eireann, tomorrow will be rather cloudy at first with isolated showers, mainly affecting the east and northeast.
It will brighten up as the day progresses to a mostly dry afternoon with only the odd light shower. Highest temperatures will range between 15 to 19 degrees, with the best of these values over Leinster.
Light to moderate northwesterly winds will occasionally be fresh along the coasts and will back westerly by evening.
On Saturday night, there will be a lot of dry weather, with just light southwest breezes.
However, Met Eireann has said that later on some rain and drizzle will push into Atlantic counties, turning more persistent closer to the coast where winds will also be that bit fresher.
Sunday is forecast to be a rather dull but humid day with patchy outbreaks of rain and drizzle, hill and coastal fog too.
There will be longer drier spells across the midlands, south and east, with the chance that the sun could break through in these parts.
Highest temperatures on Sunday will be between 14 to 19 degrees Celsius, possibly a little higher in any sunshine, best values over south Leinster and east Munster.
A mix of cloud and some sunny spells is forecast on Monday with a scattering of mostly light showers, however a few heavier ones may appear over parts of the west and north.
Parts of the south and east may remain largely if nor fully dry, Met Eireann has said as highest temperatures reach 18 or 19 degrees.
Tuesday is forecast to be a dull wet day with outbreaks of rain, turning heavier through the day, possibly leading to spot flooding later in the evening.
There will be highest temperatures again of 14 to 17 degrees Celsius in moderate southwest winds, the best values over Leinster, where it could remain dry till midday.
Current indications suggest that it will be mixed for the rest of the week, with weak weather fronts pushing in from the Atlantic, bring some falls of rain.