Issued: 0900hrs Monday 17th August 2026
Duty forecaster: Simon Keeling

A more unsettled week with rain and showers, fresher too

A more unsettled week than many areas of the British arms have seen for some time. There will be periods of rain and showers, the showers becoming heavy towards the end of this week. It will be fresher as well. Pressure builds again later in the weekend which brings further dry weather and rising temperatures. However, heavier rain may arrive in Ireland and western parts of the UK by the early part of next week.

For the weather for the next few days click here

Thursday 20/8/26
More mixed weather on Thursday the many areas have seen for some time. Low pressure will be off eastern areas and this is going to bring a day of rain and showers too many areas. The showers could be heavy and thundery at times. The showers may also merge into longer spells of rain. In between these areas it will be dry with sunny spells. The best of the dry weather probably in central and northern Scotland. Highs at 23C in the far south of England, 12C in central Scotland and 19C in central Ireland.

Friday 21/8/26
Low pressure affecting England and Wales on Friday. Areas of showers from early in the day, merging into some longer spells of rain, developing into heavier and thundery downpours for central, eastern and southern areas of England and Wales in the afternoon. A scattering of showers for Scotland and Northern Ireland too. Cool northerly breezes. Highs at 14C in northern Scotland, 22C in southern England.

Saturday 22/8/26
High pressure builds to the west of Ireland on Saturday. A scattering of showers are expected, but fewer than previous days. Odd heavy bursts though by afternoon for southern England and Wales. A mix of broken cloud and sun toward the north of England, Scotland and Ireland, just brief showers here. A light northerly breeze. Highs at 15C in Scotland, 22C in southern England.

Sunday 23/8/26
High pressure likely drifts further over Britain on Sunday. Most areas are likely to be dry with sunny spells, the best of these in the west. A few scattered and mostly light showers mainly into the afternoon. Light winds and feeling a little warmer. Highs at 16 to 24C.


 

Monday 24/8/26
High pressure likely shifts eastward but covers most of Britain bringing fine conditions. A warmer southwesterly breeze is likely. Rain may edge close to the far west of Ireland. Highs 17 to 26C, warmest in the south and east of England.

Tuesday 25/8/26
Thundery outbreaks of rain affecting the far west of Scotland, Ireland, the far west of Wales and Southwest England on Tuesday. Elsewhere high-pressure remains bringing a fine and warm or very warm day with the best of the sunshine in the more eastern areas. Highs at 29C in eastern England, 17C in Ireland.