Until now, the record daily high was 358 coronavirus cases, recorded on August 26.
Currently, 269 patients are being treated in hospitals, including 15 persons on ventilators.
Since February 25, when Croatia registered its first case of the infection, a total of 11,094 people have contracted the disease, 194 of whom have died, while 8,266 have recovered.
At the moment, 8,901 people are self-isolating.
To date, 179,838 persons have been tested for the virus, including 4,492 in the last 24 hours.