Weather expert Alan O'Reilly has pinpointed exactly when a "blast of cold air" will hit Ireland and send the mercury plummeting.
The change in temperature will hit on Sunday and last a few days. Mr O'Reilly also warned the public against putting away the winter coat just yet.
He said: "If you feel inspired to get the garden furniture out and put away the winter coat you might want to hold off. The weather models are showing a late blast of cold Northerly air heading our way from Sunday for a few days! Animation shows upper air temp forecast."
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Met Eireann also forecast a drop in temperature on Sunday which will likely last into next week. Their forecast for the week reads:
Today
Today will be rather cloudy with sunny spells improving later in the day. Mainly dry with the chance of an isolated shower. Highest temperatures of 11 or 12 degrees in mostly moderate easterly winds, fresh at times near the coast.
Tonight
Mainly dry and clear tonight. Lowest temperatures of around 5 degrees in mostly moderate easterly winds, fresh at times.
Tomorrow
Dry and sunny tomorrow, Thursday. Highest temperatures 11 to 13 degrees, as moderate to fresh easterly winds ease later.
Tomorrow night
Dry and clear on Thursday night with lowest temperatures between 2 and 5 degrees with light northeast breezes.
Friday
Mainly dry and sunny to begin on Friday. Cloud will increase through the morning with patchy outbreaks of rain and drizzle developing through the afternoon and evening over the southern half of the country, isolated showers further north. Highest temperatures 13 or 14 degrees in moderate to fresh northeasterly winds.
Friday night
Mostly cloudy in the east and south on Friday night with patchy rain and drizzle. Drier and clearer for a time in the west and northwest with cloud increasing there too overnight. Lowest temperatures of 2 or 3 degrees in light to moderate northeast breezes.
Saturday
Saturday will be a mostly cloudy day with showers or longer spells of rain. Highest temperatures of 11 to 13 degrees in light easterly or variable breezes.
Sunday
Mainly dry on Sunday to start, afternoon showers will develop. It'll turn colder later as winds become northerly. Temperatures on Sunday between 9 degrees in the north and 14 degrees in the south then currently it looks like it could potentially turn frosty again overnight Sunday night as a cold northerly airflow becomes established.
Next week
Current indications suggest a cold but mainly dry situation for the start of next week with rain arriving from the west midweek.
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