Look forward to temperatures of 29 degrees today - this heatwave is set to last all week.
Met Éireann has issued a weather advisory as temperatures are to remain in the high twenties until Friday at least.
Day-time temperatures will remain in the high twenties until Friday, meanwhile, even night-time will be very humid with temperatures staying in the mid to high teens.
Any early mist or fog patches will soon clear as it will become very warm today with long spells of sunshine across most of the country. However, in coastal areas of north Ulster it will be somewhat cloudier.
Maximum temperatures will generally range from 25 to 29 degrees.
Monday will be another very hot day with plenty of sunshine. Although, an isolated heavy shower may break out through the midlands during the afternoon or evening.
Maximum temperatures are likely to reach 24 to 28 degrees.
The week is going to continue to be very hot with virtually unbroken sunshine and clear skies on Tuesday. Maximum temperatures will hit 24 to 28 degrees.
Wednesday also looks set to be a hot day with top temperatures ranging from 25 to 29 degrees. There'll be lots of sunshine and just scattered cloud, mainly across the western half of the country.
It will also be uncomfortably warm and humid on Wednesday night with temperatures not falling below 16 to 19 degrees with light south or variable winds.
Thursday will be another very warm day with sunshine and scattered cloud. Maximum temperatures will once again soar to 25 to 29 degrees.
There will also be warm sunshine for many on Friday but with some scattered showers or thunderstorms possible, especially across Munster where more general rain may push in during the day.
Maximum temperatures will reach 22 to 27 degrees.
