Saturday
Higher pressure across southern areas of the country on Saturday where most will stay dry with broken cloud and sunshine, best in the southeast; also becoming sunnier around coasts in the west and southwest during the day. North and west Scotland will be affected by showers, these pushing inland for several afternoon hours. Some light showers or drizzle in northwest England and western coasts and hills of Wales in the morning, a few drifting inland, but fading with time. Westerly breezes in the north, lighter south, locally calm southwest. Highs 27C southeast England, 25C Midlands, 19 to 22C further north and west (including Ireland), nearer 17C Scotland.

Saturday Night
Showers will fade into night and isolate to just the western Scottish highlands. Little cloud across eastern areas of Britain at first, but cloud will build over Ireland and southwestern parts of Britain as a new low pressure system slowly approaches from the Atlantic. In the later overnight hours, southern and western parts of Britain will become increasingly cloudy, just a little patchy rain into the southwest of Ireland as Sunday sunrise approaches. Lows of 8 to 12C, warmest in southeast England.

Sunday
An Atlantic low pressure system to moves toward southwest Ireland on Sunday. Patchy rain increasingly drifting into central Ireland, some extended spells with heavier bursts increasingly forming. With time, a few patches will reach southwest England and Wales. Otherwise a dry day for most of Britain and Northern Ireland; fairly cloudy but with sunny spells and feeling rather warm and humid. Some light showers in north Scotland. Warmest south and east, highs at 27 to 29C, to 24 to 26C central England. Eastern Ireland and Scotland approaching 19 to 21C, western parts only reaching 16C.

Monday
A complex and shallow area of low pressure lingers to the southwest of Ireland, bringing rain and heavy showers, a risk of local thundery downpours. Ireland, southwest England and Wales into southern Scotland are indicated to see most outbreaks of rain. A drier, brighter day in the east of England, but the rain is likely to move eastwards into the evening and night with some thunderstorms for eastern and northern England possible. Feeling humid once again. Highs to 32C south, 19 to 22C northern England and Ireland, nearer 17 to 19C Scotland.