Two weather warnings have been issued for several areas as temperatures are set to drop back.
A status yellow snow and ice warning is in place for Connacht, Leinster, Cavan, Monaghan and Donegal.
The forecaster says very cold wintry weather will develop from Wednesday night onwards.
Showers will turn wintry in many places, from Wednesday evening to Saturday, with falls of sleet and snow expected.
The heaviest of the snow fall is most likely over Ulster, Connacht, north Leinster and west Munster - and especially on high ground.
Turning #colder this week with strong northerly winds bringing the risk of #snow for some later in the week â„ï¸ â„ï¸ pic.twitter.com/NRHaQm0C9w
— Met Office (@metoffice) January 9, 2017
Meanwhile a status yellow wind warning is also in effect for Donegal, Leitrim, Mayo and Sligo.
Met Éireann is forecasting west to northwest winds will increase tonight, with averages of 55 to 65 km/h expected.
While gusts of between 90 and 110 km/h are also predicited. It also says winds will be strongest in exposed coastal and hilly areas.
It comes as much colder weather, which had been affecting parts of continental Europe, moves towards Ireland.
