It might be time to ditch the PJs completely.

With seriously sweltering conditions on the way for most of Ireland in the coming days, Met Éireann is also forecasting a weather phenomenon known as ‘tropical night’ early next week.

The national forecaster has already warned that the entire country will experience a hot spell on Sunday and into early next week. Day time temperatures will widely reach the high twenties, “possibly exceeding 30 degrees in some locations”.

If you hoped there would be some respite after dark, think again: Temperatures will remain “uncomfortably warm overnight too” hovering as high as 20C after the sun goes down.

“While the high builds in on Friday and Saturday the high temperatures will range generally in the low to mid 20s. There will also be some upper cloud at times making sunshine a little hazy and there is a chance of a few showers too.” says meteorologist Paul Downes.

“As the high begins to drift a little to the east on Sunday, temperatures will rise to mid to upper 20s with temperatures possibly surpassing 30 locally on Monday. There is a little more uncertainty regarding Tuesday but it does look like it will be another hot day and perhaps as hot if not hotter than Monday.

“While this warmer air moves in our direction there will be the chance of a few thundery bursts especially on Tuesday.”

The nighttime temperature will be very warm and humid with temperatures on Sunday and Monday night not likely to fall below the mid to high teens.

In some areas they may not fall below 20°C, which is known as a ‘tropical night’.