Home
Weather Dublin
WeatherRadar
RainfallRadar
TemperatureRadar
WindRadar
LightningRadar
Weather News
Editor's Pick
Discover the app
Weather widget
Contact us
Apps
    Home / Weather News /

    Jaw-dropping heat: How likely is 40C in the British Isles?

13:00
11 July 2022

Jaw-dropping heat
How likely is 40C in the British Isles?

Hoards of people flock to Brighton Beach on the hottest day of the year so far
Hoards of people flock to Brighton Beach on the hottest day of the year so far - © picture alliance

Some frightening temperatures remain on the cards heading into the weekend and early next week, but how likely really is it?

At first, it was just one weather model, the GFS, pushing for seemingly absurd temperatures into the 40s Celsius, but as the days have gone on, this weather model is no longer standing alone.

Other models have now begun lining up with similar figures, suggesting that we could potentially shatter the UK’s all-time temperature record of 38.7C.

The all-time temperature record of 38.7C was observed in Cambridge in July 2019. Out of the last 100 years of records, twelve of those years have seen temperatures rise above 35C in the British Isles, four of which have occurred since 2015.

Whilst it once seemed almost impossible to reach 40C in the British Isles, it also seemed similarly unlikely to reach 50C in northwest Canada, or 30C in arctic Russia. However both occurred in June 2021 and June 2022 respectively.

In the British Isles, conditions to achieve these kinds of heights must be just right, and it all relies on the track of a plume of exceptionally hot air being transported from the south, accompanied by high pressure.

Once this forecast period comes into the short-range, high-resolution models, confidence in these model outputs can build.

A model output isn’t a forecast, but it does show a possibility, however small. So, whether we will see 40C next week or not is still uncertain for now, but extremely alarming that it is no longer unrealistic.

Keep an eye on our TemperatureRadar to check out the temperatures three days ahead.

Weather & Radar editorial team
More on the topic
Violent thunderstorms mark summer's end. Hail and gusts of wind. . Weather Videos. Thursday 27 August 2026
Severe thunderstorm warning map showing a level 3 red zone from eastern France toward Belgium, surrounded by orange and yellow alerts extending into western Germany.
Weather VideosThursday 27 August 2026

Hail and gusts of wind

Violent thunderstorms mark summer's end
Widespread thunderstorm risk in the UK. Heavy rain and hail too. . . Tuesday 25 August 2026
Split weather graphic showing a yellow thunderstorm warning across much of England alongside radar with heavy showers and frequent lightning around London and southeast England.
Tuesday 25 August 2026

Heavy rain and hail too

Widespread thunderstorm risk in the UK
Extreme heat in Italy. Up to 45 degrees. . . Wednesday 26 August 2026
Split screen. On the left, a temperature map of Italy. On the right, a view of Taormina and Mount Etna
Wednesday 26 August 2026

Up to 45 degrees

Extreme heat in Italy
All weather news
This might also interest you
A stormy week in the skies above. Your weather - Your shots. . . Sunday 30 August 2026
Split image showing lightning branching beneath dark storm clouds above rooftops on the left and an orange-pink sunset over a calm sea on the right.
Sunday 30 August 2026

Your weather - Your shots

A stormy week in the skies above
Bright and warm conditions take hold. Spring-like outlook. . . Thursday 23 April 2026
Split UK map showing warm temperatures up to 21 degrees in orange on the left and clear sunny conditions with temperatures from 12 to 18 degrees on the right, with sun icons across the country.
Thursday 23 April 2026

Spring-like outlook

Bright and warm conditions take hold
Storm Chandra makes impact. Severe gales & heavy rain. . . Tuesday 27 January 2026
Split image showing strong winds over the UK on a forecast map and widespread rain and snow on a weather radar map.
Tuesday 27 January 2026

Severe gales & heavy rain

Storm Chandra makes impact
All articles
Weather & Radar

Weather & Radar is also available on

Google Play StoreApp Store

Company

Contact us Privacy Policy Legal info Accessibility statement

Services

Uploader

Socials

facebooktwitteryouTubelinkList