"Weather like this is like gold for a festival," says a delighted Orla Buckley, Festival Director at Wild Roots, which starts in Hazelwood, Sligo on Thursday and runs right through the June bank holiday weekend.
It is one of several big events planned around the country for the long weekend and the good news for organisers like Ms Buckley is that the good spell of weather will last through the weekend also, according to Met Éireann forecaster, Joanna Donnelly.
Working with her team at the huge outdoor site just outside Sligo today, Ms Buckley said the ground is dry so people can sit on it and they do not have to worry about rain - just be sure to bring the suncream, she said.
Seven stages are being erected along with a craft village, children's area, performing arts and other attractions.
Headline acts include Rudimental, David Keenan, Sasha and John Digweed.
Ms Buckley is hoping that the forecast, which is predicting the best weather in the west of the country, will encourage anyone who has been sitting on the fence about getting a ticket for the festival, to log on and buy one.
The good weather forecast for the rest of the week is not technically a heat wave, that requires temperatures over 25 degrees for five days in a row, but it has already got people out and about in great form.
Rosses Point in Co Sligo was a magnet today for people swimming and walking.
Camper vans were lined up along the road and in the car parks with people like Anthony Doyle from Mullingar, Co Westmeath following the sun and planning to make the most of the good week and head on to Co Donegal.
Chris Benfield and his wife Claudia Clemente Benfield were enjoying the weather with their young daughter.
They had come from Birmingham for a wedding and heard about the Wild Atlantic Way and decided to do a road trip and could not believe their luck with the weather.
"We feel blessed", Ms Clemente Benfield said.