A nationwide status yellow high temperature warning is currently in place with temperatures in excess of 27C expected in many areas.
The warning came into effect at 8am on Thursday and will remain in place until 8am on Saturday. Met Éireann has said "very warm and humid weather" is expected on Thursday and Friday.
Temperatures are expected rise above 27C in "many areas away from coasts" with night-time temperatures not falling below 15C.
Some potential impacts include:
- Heat stress
- Uncomfortable sleeping conditions
- Risk of water-related incidents
Met Éireann have said that four of its primary weather stations have already broken their September temperature records so far.
Two of the stations are in Mayo — Belmullet and Newport. The other two are in Oak Park, County Carlow and Ballyhaise, County Cavan.
According to Met Éireann's website, temperatures in Cork city could hit 31C on Saturday. Temperatures are not expected to fall below 16C.
Meanwhile, Met Éireann has said Thursday should start off with spells of sunshine and scattered showers which will then spread northwards. The afternoon should bring plenty of warm sunshine and isolated heavy downpours with temperatures ranging between 24C and 27C.
It should stay warm later on Thursday night, with clear spells and areas of mist and fog. Met Éireann have said it should stay mostly dry but an "isolated shower cannot be ruled out."
The mist and fog should lift from most areas on Friday morning, but "may linger in coastal areas".
"It will be another very warm day with plenty of autumn sunshine. However, a few heavy showers or thunderstorms may break out inland during the afternoon and evening," the national forecaster said.
Looking into the weekend, Saturday should see a rather cloudy and misty start to the day with isolated heavy showers with sunshine developing in many areas during the afternoon with highs of 25C expected.
Saturday night should stay warm and humid with some clear spells and scattered heavy showers or thunderstorms. Low temperatures of 15C to 18C are expected.
Sunday should see a mix of cloud, sunshine and showers with some turning heavy and thundery with the potential for spot flooding. Highest temperatures of 19C to 24C are expected.
Check out the Irish Examiner's WEATHER CENTRE for regularly updated short and long range forecasts wherever you are.