It's in effect from 1 pm tomorrow until Sunday morning.
A Status Yellow high temperature warning has been issued for 12 counties.
It effects the midlands, Carlow, Kildare, Kilkenny, Meath, Wexford, Limerick, Tipperary and Waterford from 1pm tomorrow until 7am on Sunday.
Met Eireann is warning of temperatures exceeding 27 degrees Celsius, and uncomfortable sleeping conditions.
A hot weather advisory remains in place for the whole country until Tuesday.
Meteorologist with Met Éireann, Deirdre Lowe says further alerts could be issued for other parts of the country in the coming days:
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