Every county has been placed on alert for bad weather, as warnings have been issued right across the country.
A status orange rainfall warning has been issued for Cork, Kerry, Tipperary and Waterford with very heavy rain forecast on Monday night and Tuesday.
Met Éireann says this will likely cause river flooding and surface water flooding, with rainfall totals of 50 to 80mm.
This will also be higher in mountainous regions.
The alert is in place from 7.00pm on Monday until 9.00pm on Tuesday.
While a status yellow rainfall warning will be in effect for Leinster, Cavan, Monaghan, Clare, Limerick and Connacht from 9.00pm on Monday.
This alert, which will be in place for 24 hours, will see rainfall totals of up to 50mm.
And a status yellow wind warning has also been issued for Carlow, Kilkenny, Wexford, Munster, Donegal, Galway, Mayo and Sligo.
The forecaster says southerly winds will reach mean speeds of 50 to 65km/h, with gusts of 90 to 110km/h.
This will possibly be higher on exposed coasts - while onshore winds could also see a risk of coastal flooding.