Met Éireann has issued a severe weather warning for Connacht and west Ulster.
The Coast Guard has also issued warnings as parts of the country will be battered by storms and gusts of up to 150km/h.
Hail, sleet and snow showers are also forecast overnight.
Severe wind is expected in counties Donegal, Galway, Leitrim, Mayo and Sligo this evening, where a status red warning has been issued.
Status red is the highest alert that can be issued.
In counties Clare and Cavan, severe southwest winds are due to reach 120km/h and will be strongest in exposed areas.
The expected winds have caused management at the Cliffs of Moher visitor centre in Co Clare to close the tourist attraction to the public this afternoon.
The Road Safety Authority has asked road users to take extra care in the bad conditions.
The Irish Coast Guard is strongly advising people not to go out on exposed coasts, cliffs or piers as huge waves can be whipped up by high seas, posing hazards to anyone close to the shoreline.
It also urges vigilance over the festive period where people engaged in outdoor activities may not be familiar with the dangers of inclement weather.