It beats the previous record from 2006.
Dublin has recorded its all time highest temperature, right now it's 33 degrees in the Phoenix Park.
That beats the previous record of 31 degrees, recorded in July 2006 in Casement.
Nationwide, it's Ireland's second highest temperature on record.
Met Éireann has said the mini heatwave will end tonight, with temperatures dipping back down again this week.
A yellow warning will last until midnight but Leinster will remain under the alert until tomorrow evening.
Darren O'Connor, from Dublin Fire Brigade, says even with cooler conditions, the risk of wildfires remains extremely high:

Kildare North TD Joe Neville Appointed As Fine Gael Spokesperson On Infrastructure And Delivery
Secondary School Exam Fees Set To Be Reinstated In 2026
Kildare Cancer Survivor Welcomes ‘Right to be Forgotten’ Breakthrough
€2 Million Transport Fund Announced to Support Learners with Disabilities
Fears Surround Potential Job Losses At Claire's Newbridge Store
Previously Paused Social Housing Project In Athy Gets Go-Ahead
Spike in Helpline Calls After Controversial Parade Float
Warmest Day Of The Year So Far As Temperatures Climb