Met Eireann have issued a Status Yellow warning for one county with winds of up to 100km/h expected.
The alert is in force for Donegal from 11am until 4pm on Sunday with gusts expected to be strongest near the coast.
The warning reads: "West to northwest winds will widely reach mean speeds of 50 to 60km/h with gusts of 90 to 100km/h.
"Winds will be stronger near coastal areas, where localised wave overtopping is possible, and on high ground."
It comes as Met Eireann are also predicting "hail or sleet showers" in the northwest of the country this weekend.
Expert Cathal Nolan from Ireland's Weather Channel explained that conditions will be very changeable, with the worst of the cold weather expected on Sunday.
He told Midwest Radio: "We don't expect this to be a particularly long cold spell, at the moment the Atlantic weather is pretty much dominating across the country, and with that we're typically seeing very mobile conditions.
"So we're seeing a change between milder conditions with drier interludes, and then colder, clearer, showery conditions as well in some parts.
"Overall we're expecting conditions to last only for about Sunday itself."
Meanwhile forecasters have said that the sub-zero temperatures on Sunday night will lead to frost, and maybe ice.
A Met Eireann forecaster said: "Limited brighter spells in the south and east early Saturday morning, before outbreaks of rain and drizzle extend countrywide, and continue for much of the day. Rather windy too, in fresh to strong west to southwest winds with gales on western and northern coasts. Highest temperatures of 7 to 11 degrees, best values in the south.
"Blustery outbreaks of rain will continue overnight with some heavy bursts and possible spot flooding. Lowest temperatures of 2 to 7 degrees, coldest across Ulster, all in fresh and gusty westerly winds.
"Sunday will be a cold and blustery day with widespread showers and some sunny spells. A few hail or sleet showers are possible too, mainly for northern areas. Isolated thunderstorms will occur across northern fringes too. Highest temperatures of 6 to 9 degrees, best values in the south. Feeling colder owing to brisk westerly winds.
"Cold, calm and clear on Sunday night with frost and possible ice. Towards morning, cloud and patchy drizzle will arrive into western counties. Lowest temperatures -1 to 4 degrees, coldest in the east."
And later next week will see some "wintry" showers in the west and northwest with both frost and ice possible by Thursday and Friday as temperatures plummet.
A forecaster added: "Some brighter spells on Monday across the midlands and east, but overall cloudy and breezy with patchy outbreaks of drizzle. Mild though with top temperatures of 11 to 14 degrees, in fresh southwest winds.
"Another mild day on Tuesday with blustery outbreaks of rain. However, parts of the east and southeast will stay fully dry with some sunny spells. Highest temperatures of 10 to 14 degrees in mostly fresh southwest winds.
"Outbreaks of rain will push down across the country, as westerly winds moderate. Colder weather will move in overnight with lowest temperatures of 2 to 6 degrees, coldest across Ulster and Connacht.
"Sunshine and scattered showers on Wednesday and Thursday, some wintry in the west and northwest. Highest afternoon temperatures of 4 to 8 degrees. Feeling even colder owing to a stiff westerly breeze. Frost and ice too, especially for sheltered areas after-dark."
