The UK is bracing itself for a sweltering heatwave next week as "extreme" marine temperatures around the British Isles continue to rise. For the first time in recent memory, sea temperatures off our coast are reaching record highs, forcing their way into atmospheric conditions and sparking warnings of prolonged hot weather.
Forecasters at the Met Office attribute this unusual combination to warming seas which are boosting air temperatures as weather systems sweep across the country. With temperature thresholds varying by region, many areas can expect prolonged periods of scorching heat – with some southern and central parts of England potentially reaching highs of 28-30°C.
Those most at risk will be in the south and centre of England, including London and the South East. Wales and Northern Ireland are also expected to see warmer conditions, though not quite as extreme as those forecast for parts of England. Scotland's southern regions will feel above-average temperatures, while cooler sea breezes may offer respite along its coasts.
The Met Office is monitoring developments closely and plans to issue official heat health alerts in the coming days, focusing on vulnerable groups. Public Health England advises staying hydrated, seeking shade during the hottest periods, and checking on elderly or unwell neighbours. Meanwhile, environmental agencies are raising concerns about the impact of extreme marine temperatures on local ecosystems and fishing industries.
While wind speeds won't be a major factor in this heatwave, light breezes may offer some relief in coastal areas – but inland regions could suffer from stagnant, sweltering air that exacerbates the feeling of warmth. The duration of this heatwave is still being assessed, with current models suggesting it could last several days and put pressure on infrastructure and public services.