Public transport should now be avoided where possible and those over 70 are being asked to restrict their social circles.
Visitors into homes are now limited to six people from three households while outdoor gatherings of no more than 15 are allowed.
Gardaí are also to be given greater powers to enforce the rules.
All measures are to remain in effect until September 13th and come as 190 cases of coronavirus have been confirmed.
Health Minister Stephen Donnelly says the country's at a crucial moment with the virus:
