Parts of Ireland will be hotter than Lanzarote on Wednesday.
Met Eireann is forecasting a hot, dry and sunny day, as a brief heatwave looks set to arrive.
Some areas can expect to see afternoon temperatures of up to 24C - making it hotter than parts of the Canary Islands.
A forecaster said: "Today will be a dry, warm and sunny day. It will be humid with top temperatures reaching 20 to 24 degrees.
"But it will be a few degrees cooler along northern and eastern coasts in the onshore light to moderate northeasterly breeze, which will freshen along south and west coasts later."
Wednesday night will be dry, apart from the "odd shower" in the southwest.
Lowest temperatures will range from 10C to 15C, but it will be cooler in th north.
"Tonight will be dry with good clear spells and perhaps just the odd shower in the southwest.
"Lowest temperatures will be 11 to 15 degrees generally, but cooler in the north with lows around 8 to 10 degrees and some mist patches there. Northeasterly winds will be light to moderate."
And large parts of Ireland are to experience heatwave conditions on Thursday and Friday as temperatures soar.
Both days will be scorching hot with highs of 27C - but there is still a risk of thundery showers breaking out.
A forecaster said: "Thursday will be another dry and sunny day with the risk of isolated heavy or possibly thundery showers in the southwest.
"It will become even warmer with top temperatures reaching of 22 to 27 degrees generally, but a few degrees lower along eastern coastal fringes in moderate easterly onshore breezes.
"Friday will continue warm and mostly dry in the east, but cloud will increase from the west with patchy rain at first there but later there is the risk of heavy thundery showers breaking out.
"Top temperatures reaching 20 to 27 degrees in moderate southeasterly breezes."
