Today will start off cloudy and wet, with rain slowly clearing northeastwards through the afternoon and evening.
Temperatures will be cooler than in recent days with highs of 14 to 17 degrees.
Most of tonight will see a mix of clear spells and showers, though it will turn very wet by morning as rain extends northwards.
The rain will be heavy in places, bringing a possibility of localised flooding.
There is a chance of strong winds developing as well. Lowest temperatures of 8 to 11 degrees.
A Yellow status rain warning for the whole country has been issued and is valid from 9pm tonight to midday tomorrow.
A similar warning has also been issued by the Northern Ireland Met Office for counties Antrim, Armagh, Down, Tyrone and Derry.