Temperatures could reach the low 30s.
The Midlands is now under an advisory for hot weather.
Met Eireann is warning temperatures could reach the low 30s in parts of the country from Friday.
There's also a warning of uncomfortable sleeping conditions between now and next Monday night, with values not expected to dip below 15 degrees at nighttime.
However, Meteorologist with Ireland's Weather Channel, Offaly's Cathal Nolan, says the coming days won't feel as warm as during the last heatwave at the end of June:
Almost €446,000 Allocated To Midlands Community Centres And Clubhouses
Two People Killed In Offaly Following Fatal Crash
Midlands Family Takes On Ireland’s Fittest Family Challenge
5K Fundraiser To Support Motor Neurone Disease Association Takes Place In Westmeath
No Slowing Down With Age As Westmeath Bowlers Shine At 14th Annual National Bowls Competition
Woman Appears In Court Over €280k Cannabis Seizure In Midlands
Status Yellow Fog Warning Issued For Leinster, Munster And Galway
Call For More Public Toilets Across The Midlands And Beyond