Temperatures are set to reach 16 degrees on Thursday as the fine spell of weather continues across most of the country.
Dry weather is expected throughout most of the day but the south should experience cloudier conditions with the chance of patchy light rain in the southwest, Met Éireann said.
There will be slight ground frost in areas overnight as temperatures fall as low as 3 degrees while some rain is expected along the south coast.
Friday will also remain mostly dry but cloudier conditions in the south are expected to bring occasional rainfall. It will be warmest in the west with top temperatures of about 15 degrees forecast.
Met Éireann said temperatures on Friday night will fall to between 1 and 4 degrees while Saturday will be a cold, if mostly dry, day in a moderate northerly breeze with top temperatures of 9 to 11 degrees.
Sunday will start similar, mostly dry with scattered showers in the north and northwest, but will become cloudier later in the day. Top temperatures will again be 9 to 11 degrees.