The heat will be turned up across large swathes of the country this week when a wave of warm air sweeps up from the Mediterranean.
July is set to end with a 30C blast of summer heat but rain won’t be too far away.
BBC forecaster Louise Lear said 30C is expected in parts of the south on Friday with many areas also seeing the mercury soaring into the high 20s, MirrorOnline reports.
However, the period of hot weather won’t be prolonged before a spell of wet and mild conditions return during the start of August.
The forecaster indicated the “extreme heat is not going to stay with us” with “no signs of anything settled, warm and sunny for the start of August”.
The second half of the weekend is expected to be “a bit more comfortable” as temperatures dip but there will be a “return to wetter weather into the northwest”.
Before then it will be damp and breezy to start the week – with two inches of rain and 40mph winds expected on Monday.
The blustery showers are expected to ease on Tuesday but temperatures will remain “down on where they should be for the time of year”.
But from Wednesday, high pressure will start to settle in, with temperatures peaking at 22C while on Thursday there will be clear signs of change. Southerly winds will allow temperatures to hit highs of 26C by the afternoon and that southerly wind will remain into the weekend.
The forecast was echoed by The Weather Outlook, which stated: “Wednesday is looking mainly dry and bright. Temperatures will be higher than in recent days and in the south it should feel quite warm.
“During Thursday and Friday outbreaks of rain are possible in the north west. Other areas have a lot of dry and sunny weather. It is set to turn much warmer and the last day of the month could see 30C (86F) being exceeded in the south.
“Through the weekend cooler air returns southeastwards and there is a risk of heavy showers or thunderstorms for a time.
“By Sunday showers could become restricted to central and eastern counties as a ridge of high pressure builds in from the west.”
And into next week it looks like that “gear change” is set to continue. The forecast states: “Low pressure will move in from the Atlantic, with a westerly feed set to dominate. One low clears away only to be replaced by yet another.”
UK five day weather forecast
Windy with rain, heavy at times, pushing across the UK, most persistent over Scotland where cool.
Some brighter and warmer spells developing elsewhere later though scattered showers and thunderstorms developing along with hail and some gusty winds.
Staying wet and becoming windier in north Scotland. Elsewhere rather cool and breezy with clear spells and scattered showers, mainly for W Scotland, Northern Ireland and northwest England.
Cool and showery in northwestern parts of the UK but largely dry further southeast with only isolated showers. Persistent heavy rain and gales, locally severe, continuing for northern Scotland.
Outlook for Wednesday to Friday:
Most places dry Wednesday with lighter winds. Bright for many Thursday but rain may reach northwestern areas. Friday, sunny and very warm, perhaps hot, though with thundery showers possible later.