Sligo University Hospital was one of the most overcrowded facilities nationwide in July.
Latest figures from the Irish Nurses and Midwives Organisation show that a total of 617 people waited for a bed over the course of the month.
It’s an increase of 126 compared to 491 in July of last year.
In a statement, the INMO say that the level of hospital overcrowding we have seen throughout this summer has been a cause of serious concern.
Since the beginning of May 27,832 patients were without a bed in Irish hospitals including 9,191 in July.
The INMO is warning that unless a hospital-by-hospital plan to tackle overcrowding is put in place, a very bleak winter is on the horizon in Irish hospitals which will see nurses and patients in extremely unsafe circumstances.