Any mist or fog will quickly clear this morning to leave a mostly dry and sunny day with highs of 18 to 21 degrees.
However, patchy cloud will bubble up through the middle of the day and may bring a couple of isolated showers in parts of Ulster.
Tonight will start mostly dry with clear spells and patches of mist and fog.
Cloud will increase during the night with some showery outbreaks of rain developing in the east towards morning.
Lowest temperatures of 9 to 12 degrees, in light variable winds.