The yellow weather warning will remain in place until 10am Tuesday morning 27 August.
Meanwhile, a yellow weather warning is in place for a number of counties also.
Met Éireann has issued a warning for heavy rain and possible thundershowers making for difficult travelling conditions.
The southeast is forecast to see the heaviest downpours, with five counties under a status orange thunder warning.
Met Éireann has issued a status orange thunderstorm warning for Donegal, Leitrim, Mayo and Sligo, which is valid from 3pm to 9pm on Monday. A status yellow warning is in place for the northwest.