"We also ask they limit the number of people visiting and although we haven't set a specific number we want to maintain social distancing requirements," Simpson said.
Last time the hospital was in alert level 2 all patients were able to have more than one visitor per day but numbers differed from ward to ward.
Under levels 4 and 3, strict visiting guidelines limited patients to one support person in certain wards and none in others.
Patients in the maternity ward, children's ward, critical care units and those receiving palliative care could have more than one visitor at a time, after discussion with the unit manager.
All other patients could have more than one visitor a day, but they had to visit individually at different times of the day.
Visiting hours at Whanganui Hospital remain 8am to 8pm, seven days a week.