Gusts in the capital will reach as high as 120km/h and there is a significant risk of coastal flooding across the country.
Met Eireann has upgraded the weather warning for Dublin as Storm Brendan approaches Ireland.
The warning will now come into effect at 8am on Monday morning, and has been changed to orange status.
Gusts are anticipated to reach up to 120km/h and there is a significant risk of coastal flooding across the country.
The warning has also been updated for the rest of Leinster, along with Cavan, Monaghan, Clare, Cork, Limerick, Tipperary and Waterford.
There is also a red marine warning for gales that are expected on all Irish coastal waters and on the Irish Sea.