Brits are set to be basking in a mini-heatwave in the coming days which could see temperatures hit 29C.
Forecasters are predicting an 'Iberian plume' will move in from Spain and leave the UK sizzling.
If the mercury does reach such highs it would mean a new hottest day of the year for 2023.
The Met Office says it will be hottest in the south-east, though warns the heat could mean thunderstorms and rain showers - particularly in the south-west.
The east/west split looks set to continue, with hot and humid weather in the west and cooler, cloudier conditions in the east.
Those areas that do see the best of it, are likely to see temperatures in the mid-20s or higher.
A Met Office spokesperson told the MailOnline: "By Saturday, warmer air is being drawn up from the south for the UK, which could lead to some spots seeing temperatures of around 29C, which is most likely in the south east of England.
"More widely it’ll be around mid-20s Celsius, though could be subdued for some with some associated showers."
They added: "This increase in temperatures brings an increased chance of showers, some of which could be thundery in nature."
The Welsh seaside town of Porthmadog currently holds the record for the hottest temperatures this year with 25.1C on May 30.
Scotland
Wednesday is expected to be a dry day with sunny periods and temperatures likely to hit 22C in the likes of Glasgow.
The rest of the week is set to be dry and settled with warm sunshine in and around 20C.
The east of Scotland could see temperatures struggle to reach much beyond the low teens over the weekend.
North East
Sunshine will struggle to break through the low cloud coverage on Wednesday.
Temperatures, as a result, are unlikely to top 15C, mixed in with the odd spot of drizzle.
However, by Saturday, much of the cloud is set to have retreated to the coast leaving a good deal of sunshine.
North West
Temperatures are expected to reach 21C in parts of the North West of England on Wednesday.
They will continue to climb a touch despite slightly strengthening winds towards the end of the week.
The mercury could hit 24C by 4pm on Saturday.
Wales
In and around Cardiff is expected to see temperatures of 21C tomorrow.
It will feel warmest in the west, with northern and eastern areas feeling a little chilly the rest of the week.
Highs of 22C forecast in parts for Saturday afternoon.
Midlands
Plenty of sunshine expected tomorrow, with light winds as temperatures peak at 19C.
The mercury is likely to continue climbing over the next few days, though winds will also strengthen to the end of the week, with a risk of showers by Saturday.
However, highs of 24C are forecasted for much of the region on the same day.
London and South East
Wednesday is likely to hit 26C, and again on Saturday afternoon, according to current charts - though the Met Office suggests it could get even hotter.
Thursday and Friday are expected to be dry with a good deal of sunshine.
Despite the hot temperatures, Saturday is also predicted to see potentially heavy and thundery outbursts, and feel muggy.
South West
Wednesday is forecast to be a warm day with clear skies and highs of 22C - though some breeze around the coasts, but plenty of sunshine.
The winds will continue to pick up in coastal areas, particularly on Thursday, with Friday turning cloudier and a risk of thundery showers on Saturday.
Temperatures could hit around 23C in the likes of Exeter on Thursday and Friday, before dipping slightly over the weekend.
UK weather forecast
Today:
Low cloud will slowly retreat eastwards through the morning but persisting for northern and eastern areas where it will be chilly. Feeling warm in the sunshine further west.
Tonight:
Once again tonight, low cloud will expand into central areas. It will remain clear in parts of western and southern England. Becoming windy, especially around southern and western coasts.
Thursday:
Remaining settled on Thursday with overnight low cloud gradually burning back to northeastern coasts to leave a warm and sunny day for many. Increasingly windy for southern and southwestern areas.
