We are in for a 'rollercoaster' of a week in terms of weather as temperatures could once again jump to heatwave highs before dropping again.
Met Eireann said there will be "unsettled conditions" all week but it will be likely turn very warm on Saturday - with temperatures possibly hitting up to 25C.
Weather expert Alan O'Reilly, who runs Carlow Weather, predicted "huge uncertainty" for the week ahead.
READ MORE: Heatwave update as weather expert pinpoints possible return of warmer weather
He wrote on Twitter: "Latest charts show a rollercoaster of temperatures but huge uncertainty for the weekend and next week."
In today's weather, Met Eireann said it will start out with showers and sunny spells on Tuesday before thunderstorms and hail in the afternoon and evening.
There is a risk of "localised flooding" due to the "heavy" rain and storms.
A forecaster said: "A mix of cloud and sunny spells with showers becoming widespread and turning heavy through [Tuesday] morning. Thunderstorms will develop for the afternoon and evening bringing the possibility of hail and localised flooding. Highest temperatures of 18 to 22 degrees in light, occasionally moderate, south to southwest breezes.
"Tonight, the heavy showers and thunderstorms will ease, becoming mostly confined to northern and Atlantic coastal areas though isolated showers may continue further inland. Temperatures not falling below 10 to 14 degrees in light southwesterly breezes with some mist or fog patches developing."
In terms of rain for the week ahead, it will be driest on Thursday with just well scattered showers. However, there will be unsettled conditions for the rest of the week with spells of rain and showers.
Giving a day-by-day breakdown of the week of weather ahead, the national forecaster continued: “A mix of cloud and sunny spells Wednesday with scattered showers developing in the morning. Some showers will turn heavy or possibly thundery during the afternoon and evening. A clearance to drier conditions with better sunshine will gradually build from the west through the day with the showers becoming mostly confined to southern and eastern counties. Highest temperatures of 18 to 22 degrees in mostly light westerly winds.
"On Wednesday night, any lingering heavy showers in the east will clear away quickly to leave a dry night for most with long clear spells though a few light showers may affect Atlantic coastal counties. Temperatures not falling below 8 to 13 degrees in light variable breezes.
"On Thursday, spells of sunshine and well scattered showers, not as heavy or as widespread as previous days with plenty of dry intervals in between. During the evening, cloud will build from the southwest with outbreaks of rain and drizzle following towards nightfall. Highest temperatures of 19 to 23 degrees in light, occasionally moderate southerly or variable winds, freshening in the southwest and west towards nightfall.
"Thursday night it will be very muggy as outbreaks of rain, heavy at times, extend from the southwest through the night though parts of the northeast will stay dry till morning. Temperatures not falling below 13 to 16 degrees in moderate, occasionally fresh, southerly winds.
"Friday will be a wet day with outbreaks of rain bringing some heavy falls and the chance of localised flooding. Highest temperatures of 19 to 23 degrees with mostly moderate southerly winds.
"Some uncertainty in the details but Saturday and Sunday will be generally unsettled with spells of rain and showers. Warmer on Saturday with temperatures getting up to the mid-twenties before returning to the high teens or low twenties for Sunday.
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