Forecasters are reporting a rise in temperature for the end of the week as another band of warm air sweeps the country.
The best of the sunshine is meant to be in the south, where heatwaves could reach a sweltering 33 degrees Celsius on Friday.
However, northern and western areas will see a little bit of rain at times but forecasters don’t expect it to be heavy.
BBC Breakfast weatherwoman Carol Kirkwood said: “We’re going to see some rain but mostly in the north and the west.
“But we’re also looking at a lot of sunshine. The heatwave returns but this is mainly for southern parts of the UK.”
She added: “Although we’re looking at highs into the 30s in the south we’ll see some of that heat travel a little bit further north.”
Wednesday will start off cool, with much of the country seeing temperatures between 11 and 14 degrees Celsius.
Warmest across England, Wales and the north east of Scotland, where there will be lots of sunshine first thing this morning.
This afternoon cloud will cover much of Northern Ireland and western Scotland and there could be some outbreaks of rain here.
But by the middle of the afternoon parts of north east Scotland will hold onto some of the sunshine.
Overnight and into Thursday cloud will move eastwards from the south west, leaving behind some mist and fog in its wake.
Tomorrow temperatures will gradually creep up and it is going to feel quit humid for most Britons in the early hours of the day.
The UK is going to tap into some increasingly hot air from the near continent on Thursday and in parts of the south east temperatures could reach 30 degrees Celsius.
On Friday the heat value may potentially be 33 degrees Celsius across some of the south and east, where there will be plenty of sunshine around.
As Britain braces itself for another heatwave, with temperatures in excess of 30 degrees Celsius, bookmaker Coral makes it just 5/4 that August goes down as the hottest since records began.
Coral spokesman Harry Aitkenhead offered: “It’s been a summer of scorching sunshine and tumbling records and we’ve seen the archives re-written almost day by day.
“August looks set to be another blisteringly hot month and our odds reflect the way that we feel it has a real chance of being the hottest we’ve ever seen.”
The firm also has odds of 2/1 that the UK’s hottest ever temperature of 38.5C, set back in 2015 and recorded at Heathrow Airport, is broken this year.
“The mercury has a long way to rise but the never ending summer has been so good that we can’t rule out the UK’s hottest ever temperature being recorded,” Harry added.
BBC Breakfast airs weekdays at 6am on BBC ONE.
