A record-breaking heatwave earlier this week saw the UK’s hottest day of the year so far on Tuesday, when temperatures soared to a high of 34.7°C at St James’s Park in central London.
However, the mercury is set to rise again next week, particularly on Thursday, Friday and Saturday, leading to yet another mini heatwave.
The Met Office has issued a yellow weather warning for rain across parts of the Scottish west coast that came into effect 6am on Friday and is valid until 3pm on Saturday afternoon.
While 100mm is predicted in some of the mountains and the wet weather will be accompanied by 40-50mph winds.
BBC Weather predicts temperatures will soar to over 30°C on Thursday, Friday and Saturday next week in south-east England, including in London and Oxford.
A spokesperson for the UKHSA told The i Paper: “While further research is required, it is likely that elevated temperatures at night as well as during the day means that the body does not have a chance to cool down and therefore increases the risk of adverse health outcomes with prolonged exposures.”
The rain will continue to build up over western Scotland in the next 12 to 24 hours We could see 40-60mm of rain, and around 100mm over some mountains pic.twitter.com/aRIlal9HkF
— Met Office (@metoffice) July 4, 2025In the north and west of the UK, an area of low pressure will bring wet weather and cooler temperatures in the high teens or low twenties.
The UKHSA predicts a return to hotter temperatures towards the end of the week across much of the East Midlands, East of England, the South East and London, rising to 26–27°C on Friday and Saturday.
There were two heatwaves during the latter half of June that made the month the hottest on record according to the Met Office.
Some weather models are predicting that the Azores high could trigger another heatwave from Thursday.
What is the definition for a UK heatwave?
According to the Met Office, the UK heatwave threshold is met when a location records a period of at least three consecutive days with daily maximum temperatures meeting or exceeding the heatwave temperature threshold.
The threshold varies by UK county. The geographical differences reflect the differences in climate across the country.
The threshold temperatures have been calculated using the 1991-2020 climatology of daily maximum temperature at the mid-point of the meteorological summer (15 July).
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