Full Breakdown
UK Faces Record-Breaking May Heatwave as Temperatures Surge to 35 °C
5/25/2026, 9:11:54 PM
Record-Breaking May Heatwave Across England
On Monday 25 May 2026, the Met Office forecast temperatures of 35 °C for London and much of southeast England, exceeding the May record of 32.8 °C and establishing the hottest May day in UK history.
Background & Context
The heatwave follows a trend of accelerating warming; Europe is the fastest-warming continent, and UK summer peaks normally occur in late July. May temperatures of 30 °C have become more frequent, reflecting rising carbon-driven warming.
Key Locations and Heatwave Designations
Eight sites met the Met Office heatwave threshold of 27 °C for three days: Santon Downham (Suffolk), Heathrow, Kew Gardens, Northolt (London), Benson (Oxfordshire), Brooms Barn (Suffolk), High Beach and Writtle (Essex). Amber heat-health alerts cover the east and west Midlands, eastern England, London and the South East.
Timeline of the Heatwave
Saturday (24 May) saw bank-holiday temperatures above 30 °C. Sunday (25 May) recorded 32.3 °C at Kew Gardens, the hottest May day in 79 years. Monday (26 May) forecasts peak at 35 °C across London and the southeast. Tuesday (27 May) retains 35 °C in London, contrary to earlier cooling expectations. Wednesday (28 May) drops to a high of 28 °C in southwest England and south Wales.
Data & Statistics
Forecasted high: 35 °C (Monday, Tuesday). Current May record: 32.8 °C. Increase over record: 2.2 °C. Overnight record: 19.4 °C at Kenley, Greater London – just below the 20 °C tropical-night threshold. Prior monthly-maximum break: January 2024 (+1.6 °C). July 2022 peak: 40.3 °C (+1.6 °C).
Why It Matters / Impact
Amber alerts signal heightened strain on health and social-care services. Temperatures above 30 °C increase heat-related illness risk, especially for vulnerable groups, highlighting the growing frequency of extreme heat in a historically mild climate.
Official Statements & Responses
The Met Office described the 35 °C jump as “unprecedented for the time of year.” Health officials warned of significant impacts on medical and social-care provision, leading to amber alerts across the Midlands, eastern England, London and the South East.
Verbatim Quotes
- “Today will be the hottest day in May in the UK in our temperature records, with highs of 35C expected,” — Met Office spokesperson
- “Records are usually only broken by tenths of a degree, making this heatwave unprecedented for the time of year.” — Met Office spokesperson
Conflicting Reports & Gaps
Early forecasts predicted a temperature drop on Tuesday, yet the Met Office later projected sustained 35 °C highs for London, revealing uncertainty in short-term predictions.
What’s Next
Forecasters expect cooler weather on Wednesday, with highs near 28 °C in the southwest, and a return to typical summer temperatures later in the week. Climate projections, however, warn that similar or stronger heat events are likely later in the season.
