UK Sizzles Through Record-Breaking Heatwave With Temperatures Hitting 35C

Britain Bakes as Heatwave Rewrites the Record Books

The United Kingdom is sweltering through an extraordinary summer, with Thursday marking the eighth day this year that temperatures climbed to or beyond 34C. That milestone shatters the previous record of seven such days, a figure that had stood jointly since 1976 and 2020. The relentless heat shows little sign of easing, with forecasters warning the current heatwave could extend well into next week before cooler, more unsettled conditions finally arrive.

A Heatwave That Keeps on Going

This is the country's third heatwave of 2026, having followed intense heat spells in both May and June. The May event produced two days above 34C, June delivered four, and the current July heatwave has already contributed two more — with at least one additional day above that threshold expected on Friday.

The peak reading so far this week was recorded at Wisley in Surrey, where the thermometer climbed to 35.5C on Thursday. Wales wasn't far behind, with Bute Park in Cardiff registering 31.3C. Meanwhile, Charterhall in Scotland hit 29.3C, and Killowen in Northern Ireland recorded the province's highest reading at 27.5C.

Where the Heat Shifts Next

As we move into Friday, the most intense heat is forecast to migrate westward, targeting areas including Berkshire, Wiltshire, Hampshire, Oxfordshire, and eastern Wales — where temperatures could once again reach 34 or 35C in places. On the brighter side, a shift in high pressure toward northern Britain should usher in a north-easterly wind, bringing some relief to inland and eastern parts of England.

A more meaningful respite may arrive over the weekend, when a north-easterly breeze is expected to draw cooler air in from the North Sea on Saturday. However, residents across southern and eastern England will still experience heatwave-level temperatures, meaning the break will be partial at best.

Health Warnings Remain Firmly in Place

The UK Health Security Agency (UKHSA) has issued both amber and yellow heat health warnings covering large portions of England, all of which remain active until 21:00 BST on Sunday. Amber alerts are in force across most of England, with a yellow alert covering the north-east.

Authorities are particularly concerned about vulnerable groups, including adults aged 65 and over, young children, and individuals living with pre-existing health conditions. High daytime temperatures become especially dangerous when overnight temperatures remain elevated, preventing the body from recovering the rest it needs during sleep.

A Summer of Broken Records

While this current heatwave is not expected to break individual daily temperature records, the cumulative heat of 2026 has already rewritten the history books. During June's heatwave, temperatures peaked at an astonishing 37.7C in Lingwood, Norfolk — obliterating the previous June record of 35.6C. Cardiff shattered Wales's hottest June day with 35.9C, while Northern Ireland equalled its June record of 30.8C in Castlederg, County Tyrone.

Scotland came narrowly close to its all-time June record of 32.2C, set back in 1893, falling just short with a peak of 31.2C at Threave in Dumfries and Galloway.

For those drawing comparisons with the legendary summer of 1976 — when the UK endured 16 consecutive days above 30C — forecasters say that particular record is unlikely to fall. The all-time UK temperature record remains the staggering 40.3C logged in Coningsby, Lincolnshire, during the unprecedented heatwave of 2022.

Pollen Misery Compounds the Heat

Beyond the physical discomfort of soaring temperatures, millions of Britons are simultaneously battling elevated pollen levels. Grass pollen dominates at this time of year, but weed pollen is increasingly making its presence felt.

The conditions this week have been near-perfect for pollen accumulation — high temperatures, light winds, and a prolonged absence of rainfall have allowed concentrations to build steadily in the atmosphere. Rain ordinarily helps cleanse the air of pollen, but with dry weather expected to persist for several more days, there is little natural relief on the horizon.

Gentle easterly breezes forecast for southern areas from Friday will transport pollen across large distances, further compounding the problem for hay fever sufferers. The combination of intense daytime heat, stuffy nights, and sky-high pollen counts is making this an especially challenging week for anyone prone to allergic reactions.