Status yellow warning: Strong Atlantic jet flow brings high winds and rain
A status orange wind warning is now in place for Donegal.
Met Eireann has issued a status orange wind warning for Donegal.
A status yellow wind warning has been issued for Munster, Connacht, Leinster, Cavan and Monaghan.
The warnings remain in place from 6pm this evening until 6am tomorrow.
Gusts of 90 to 120 km/h and very high waves are expected in Donegal, bringing a risk of coastal flooding.
The outlook is for very disturbed and often extremely windy weather, with the risk of stormy conditions at times.
Forecasters have predicted bouts of heavy rainfall in the coming days over large swathes of the country.
John Eagleton of Met Eireann said: "We don't have any severe storms hitting Ireland, but it will certainly be very windy.
"We're not at the extreme level yet - but if it keeps going, we'll get there."
Rain will gradually sweep across the entire country tonight. Temperatures will tumble to a low of 3C.
Tomorrow will be a very mild, windy and wet day, with more heavy falls of rain.
"The morning will be good - but the next batch of rain will come on Friday afternoon."
Temperatures will range from 11C to 14C. Yet more rain will arrive overnight, he added.
Saturday will be a wet and windy day with more rain affecting many parts of the country.
"It will be cold with temperatures of between 4C and 5C.
"A fast moving and strong Atlantic jet flow is leading to fast moving weather systems on the surface," Mr Eagleton said.
It will be cold with highs of 5C to 8C.
On Saturday night, showers will persist and they may turn wintry as temperatures drop to around freezing. Showers will continue on Sunday along western and northern coasts, with drier weather elsewhere. It will be a slightly cooler day, with highs of 6C to 8C.
"The trend of wet and windy conditions will continue on Sunday and into next week.
"There will be short-lived brighter days at times," Mr Eagleton added.