A status yellow rain warning will come into place for Kerry on Tuesday.
Met Éireann said rain will be heavy at times and are also warning of localised flooding, difficult travel conditions and poor visibility.
The warning is valid from 12pm on Tuesday to the same time on Wednesday.
Status Yellow - Rain warning for Kerry⚠️
Rain with heavy falls at times🌧️🌧️
• Localised flooding🌊
• Difficult travel conditions
• Poor visibility
Valid: 12:00 Tuesday 31/10/2023 to 12:00 Wednesday 01/11/2023
Issued: 12:11 Monday 30/10/2023 pic.twitter.com/Zb8vcL3PHK— Met Éireann (@MetEireann) October 30, 2023
Meanwhile, the UK Met Office have issued an amber rain warning for Antrim, Armagh and Down.
They said persistent heavy rain will lead to further flooding and transport disruption.
The warning is valid from 9pm on Monday until 9am on Tuesday morning.
Met Éireann said there will be further showers in places on Monday night with the chance of some heavy downpours, especially across the northern half of the country.
Areas of mist and fog will form as winds fall light. Lowest temperatures of 3 to 7 degrees.
A foggy start on Tuesday, Halloween, with some showers in Ulster.
Mist and fog will gradually clear during the day with some sunny spells developing.
However, rain will develop in the southwest before lunchtime, extending northwards over the country during the course of the afternoon and evening.
Top temperatures ranging from 10 to 14 degrees in freshening southeasterly winds, mildest in the south.
Their overall outlook is very unsettled with showers and spells of heavy rain bringing the continued risk of flooding.
Storm Ciaran is expected to track to the south of Ireland on Wednesday night and Thursday.
It will be wet and blustery on Tuesday night with outbreaks of heavy rain bringing the possibility of localised flooding. Minimum temperatures of 8 to 11 degrees in fresh and gusty southeast winds.
Persistent rain will clear north Ulster on Wednesday to leave a day of bright spells and showers.
Some of the showers will be heavy and prolonged and will be accompanied by a blustery southwesterly breeze. Becoming largely dry for a time towards evening with clearing skies.
Highest temperatures of 10 to 13 degrees.
On Wednesday night, Storm Ciaran is expected to track close to the south coast with a spell of heavy rain extending over much of Ireland, heavy in Leinster and Munster with the likelihood of some flooding.
A strong east or northeast wind will develop also with the possibility of some very strong gusts. Lowest temperatures generally ranging between 3 and 6 degrees, coldest in Ulster.
