Forecasters are predicting high tides and winds of up to 100 kilometres per hour this weekend, due to the effects of Hurricane Tomas.
Drivers and homeowners are being warned it could lead to flooding in Dublin, Galway and coastal areas.
John Eagleton of Met Éireann said Saturday night will be quite cool, and that there will be some showery rain during the day. Sunday morning will be bright, but the rain will spread from the west on Sunday evening, with about 12 hours of rain and some wind.