A further 1,017 cases of Covid-19 have been reported in Ireland.
As of Monday morning, there were 101 Covid-positive patients in hospital with 20 in intensive care.
Dr Tony Holohan, chief medical officer, said: "While we continue to enjoy the good weather, we are unfortunately also continuing to see a rise in incidence of disease across all key indicators.
"Our 14-day incidence is now the highest it's been since 24 February at 231/100,000.
"Our five-day average is 1,159 cases per day, the highest it's been since 2 February.
Chief medical officer Dr Tony Holohan said: "If you are waiting to be fully vaccinated, then it is best to continue to socialise outdoors.
"Events like barbecues, meeting in a park or going to the beach can be enjoyed safely once we do our best to minimise the risks of transmission - only meet in small groups, wash or sanitise your hands regularly, don't share utensils and wear a face mask where appropriate. If you are meeting indoors, ensure that the room is well ventilated.
"If you have planned to attend a social event, and you experience symptoms of Covid-19, including symptoms of seasonal cold and flu such as headache, sore throat, runny nose, please stay at home, do not attend that event.
"This applies regardless of your vaccination status.
"Let your close contacts know how you feel, self-isolate and get tested. It can be tempting to defer getting a test but as soon as you experience symptoms, the best way to protect yourself and others is to arrange one straight away."