A warm-weather warning will come into effect for this region later this afternoon.
Temperatures are set to hit in excess of 27 degrees in parts of the south and west, according to Met Eireann, who've issued a yellow level alert.
It's in place for Mayo, Galway, Clare, Cork, Kerry and Limerick from 1pm until 7pm.
Meanwhile, Water Safety Ireland is warning people to stay safe when swimming in the hot weather.
Chief executive John Leech says children, especially, shouldn't take any risks.
Ice cream sales are set to rocket today with the warm weather.
Fergal O'Connor of O'Connor's Ice Cream in Lahinch, Co. Clare, says the sunshine is vital for business.