A status orange wind warning has been issued by Met Éireann for the entire country as Storm Brendan approaches.
The first of the warnings will come into effect in Connacht, Donegal and Kerry from 5am on Monday. As Storm Brendan tracks to the northwest of Ireland, southerly winds will reach mean speeds of 65 to 80 km/h with gusts generally up to 130 km/h, higher in exposed areas.
There is a significant risk of coastal flooding due to the combination of high spring tides and storm surge.
Status orange warnings indicate infrequent and dangerous weather conditions, which may pose a threat to life and property.
On Sunday at noon, Met Éireann head of forecasting Evelyn Cusack and head of flood forecasting Eoin Sherlock said Storm Brendan would bring stormy conditions, heavy rain and high seas.
They warned that people should expect disruption to travel and possible localised flooding, especially in coastal areas. There may also be some localised structural damage and trees uprooted.
Red marine warning
A red marine warning was issued on Sunday morning.
Southerly gales or strong gales will develop overnight on Sunday on Irish coastal waters from Roches Point to Slyne Head to Malin Head.
Strong gale force to storm force southerly winds will develop on Monday morning on all Irish coastal waters and on the Irish Sea, reaching violent storm force at times in the west.
The following advice can help to minimise damage: