The Met Office and BBC Weather have confirmed that the UK heatwave will last for seven consecutive days, with Amber Extreme Heat Warnings in effect from Monday through Thursday. Temperatures are widely expected to exceed 35C, peaking at 38C on Wednesday and Thursday.
Heatwave Duration and Peak Temperatures
The Amber Extreme Heat Warnings begin at 1am on Monday and remain active until Thursday. The peak of the heatwave is forecast for Wednesday and Thursday, when temperatures could climb to 38C. According to the Met Office, temperatures are expected to drop to 26C on Friday, which remains above the heatwave threshold. The heatwave will officially end on Saturday at 1am, when temperatures fall to 19C. However, BBC forecasts suggest the heatwave could extend into Sunday, June 28, in some areas.
Regional Variations and Uncertainty
The Met Office stated: "The high temperatures are forecast to persist through the week, especially in the southeast of England." There is some uncertainty regarding how long the highest temperatures will continue due to increasing cloud and thunderstorm risks. Further warnings are expected once confidence increases. In contrast, northwestern areas will experience cooler and cloudier conditions, with some light rain moving in at times.
BBC Forecast and Historical Context
The BBC reports that temperatures could hover around 30C for six or seven consecutive days in places, spanning Monday, June 22, through Friday, June 26. The heatwave is expected to finally end on Saturday, June 27, or Sunday, June 28. This hot spell follows a record-breaking May, where the UK recorded its warmest May day.
Climate Change and Human Influence
The Met Office notes that heatwaves are becoming more frequent and more intense globally due to human-induced climate change. Scientists project that hot spells will become more common in the UK's changing climate, particularly in the southeast. It is "virtually certain that human influence has increased the occurrence and severity of extreme heat events." The developing El Niño is not responsible for this current hot spell, with its peak effects expected later this year and into 2027.
