A Status Yellow rain alert will continue to be in place in Cork until tomorrow.
The rain will be accompanied by strong onshore winds.
Met Éireann is also warning of the chance of localised flooding due to unusually high tides and wave overtopping along piers and sea-walls until 9 o'clock tomorrow morning.
This mornings high tide brought flooding to low lying quays in the city.
There is surface water on Morrision's Island and surrounding areas.
Elsewhere, There's flooding on Bailick Road road in Midleton, drivers should take care on approach.