The weather this week will be a 'complete change' to what it was in the last number of days, according to Met Eireann.
An advisory for 'heavy, thundery showers' has been issued for the entire country, and will come into effect at midday until 5 o clock tomorrow morning.
Met Eireann is warning of downpours which will lead to 'dangerous driving conditions' with Leinster and east Munster expected to be impacted the most.
Meteorologist Emer Flood says it will remain unsettled for the rest of the week.
"We're going into a change to a much fresher air mass compared to last week.
"People can expect it to feel a lot fresher and a lot cooler with at best temperatures in the high teens to 20 at best, with the threat of heavy, thundershowers, particularly on Wednesday where they're quite likely to be widespread."
