A moderate weather warning is in place for Waterford until 11pm on Tuesday.
A cold spell is set to bring minus temperatures and motorists are being warned of hazardous driving conditions.
Met Eireann say it will be persistently very cold at night time and daytime temperatures will bring sharp to severe frosts and icy stretches on roads and footpaths.
Some showers of hail and sleet are expected too, falling as snow on higher ground.