A slack airflow on Sunday with pressure lowering. It is likely to be another very warm day with some broken cloud and plenty of good spells of sunshine. Some mist and fog patches around southern and eastern coasts. The slight risk of an afternoon shower in northwest England, western Scotland, western Wales and eastern Ireland as cloud builds and slightly fresher air arrives here. Highs widely at 21 to 28C, but 30C is possible in eastern England. Just 18 or 19C for western parts of Ireland.
Cloud may start to build over Ireland and far western parts of the UK on Sunday night as a front approaches western Ireland. Staying dry across the country with skies clearing to the east. A muggy night for many with overnight lows widely at 11 to 17C, 18 or 19C in the far southeast.
A weak front drapes over western parts of the UK and Ireland on Monday which could trigger a few showers in the west and perhaps longer outbreaks of light rain for western Ireland. Most other areas should be dry with good sunny spells though there is a chance of a thundery shower developing over southwestern parts of England and Wales later. A fresher day for western areas with high temperatures at 18 to 20C; warmer to the east at 22 to 30C.
Fronts remain over western Ireland and western Scotland on Tuesday bringing cloud and some outbreaks of rain. Showers perhaps edging into western parts of Wales and northern and western parts of England later. Most other areas are dry with sunny spells, the best of them in the east and south. Highs at 20 to 25C for most. Just 16C in northwest Scotland; 27 or 28C in southeast England.