Met Éireann has issued status yellow rain warnings, with possible flooding, for Cork and Waterford this weekend.
The warning for Cork comes into effect at 5pm on Sunday and will end at 11pm. In Waterford, the warning is valid from 6pm on Sunday until 2am on Monday.
The forecaster said heavy and persistent rain could lead to potential spot flooding.
It comes after a major clean-up operation in Co Cork after up to 65mm of rain was recorded in locations across the county in a 12-hour period last week.
Matt Williams: New Zealand are suffering an existential crisis of identity
Galway loses another restaurant: ‘I had depression for one month. This was my dream. But we have to close’
Ex-Leinster rugby player Rocky Elsom has left Ireland after gardaí arrived to take him into custody
Averil Power: ‘I had two babies who died in pregnancy. I think about them all the time’
Bantry was one of the worst affected areas with a number of shops flooded on Main Street and New Street. The town has experienced regular flooding over the year with four serious incidents in an 18-month period between 2018 and 2020.
Meanwhile, across the country there will be isolated showers this weekend but otherwise dry, clear spells and a touch of frost.
Cloud will gradually thicken throughout Sunday with scattered outbreaks of rain and drizzle developing, the forecaster said.
Persistent and heavy rain is to affect southern counties during the evening, as the status yellow warnings stated.
The last of the rain in the east will clear by Monday morning with sunny spells following and highest temperatures of 11-16 degrees.
Monday night will be cloudier with lowest temperatures of 6-11 degrees.
The outlook for the remainder of the week is “generally unsettled” with spells of rain and showers.
- Sign up for push alerts and have the best news, analysis and comment delivered directly to your phone
- Join The Irish Times on WhatsApp and stay up to date
- Listen to our Inside Politics podcast for the best political chat and analysis