It will be cold and dry today except for a few showers in the south-west, according to Met Éireann.
Sunny spells will develop in most areas, with some cloudy periods.
Temperatures will reach 4 to 7 degrees, in general, and will peak at 9 degrees in south Munster, before dropping below freezing in places tonight, with some icy stretches in places.
The national forecaster has warned that it will be coldest in the north of the country with lows of -2 degrees.
Outbreaks of rain and drizzle will develop overnight in the south and south-west, with temperatures to fall no lower than 4 to 5 degrees.
Saturday – It will be a dry, bright and fresh day with sunny spells expected in most areas.
It will be cloudier in the south with some rain and drizzle expected. Temperatures will be in the region of 5 to 7 degrees and will fall between -2 to 2 degrees during the night.
Frost will develop on Saturday night with some icy stretches in places and a possibility of mist and fog.
Sunday – Met Éireann predicts that it will be another cool, but fine and dry day. There will be some sunny spells with highs of 5 to 7 degrees.
Temperatures will fall between -2 to 2 degrees on Sunday night, with sharp frost set to develop in many areas.