It's the highest figure for the month of June since records began.
Some 608 patients are without a bed in Irish hospitals today, according to the Irish Nurses and Midwives Organisation.
This is the highest daily figure for the month of June since the INMO began counting trolleys sixteen years ago in 2006.
In Naas General Hospital 12 patients are waiting for beds, up from three people yesterday.
Naas resident, INMO General Secretary, Phil Ní Sheaghdha commented:“Every passing day that we allow trolley numbers to continue to rise in summer is an acceptance that chronic overcrowding, sicker patients and burnout nurses and other healthcare workers are going to be the key features of our health service this winter.
“The Emergency Taskforce must immediately convene. The HSE and Minister for Health cannot continue to ignore the importance of this body when it comes to tackling the root causes of the chaotic scenes we are seeing in emergency departments across the country.
“The fact that there are 608 patients without a bed in Irish hospitals at the end of June is a warning that unless the HSE and Department of Health tackle this issue head on now we are in for a very bleak autumn and winter in our hospitals," she said.
“Our emergency departments are pressure cookers at the moment. The fact that COVID cases have increased by over 333% hospitals in the space of three weeks coupled with long wait times to be admitted is a disaster waiting to happen.
“It is not normal that for fourth time this year we are seeing trolley numbers go over 600 at the end of June," she insisted.
"There are actions that the HSE can take in the short, medium and long term to tackle this crisis including the immediate cancellation of non-urgent elective care and the reintroduction of COVID testing when a patient presents at the ED," she added.