The seas around the UK are experiencing a significant heatwave, with temperatures up to 4°C above average, raising concerns for marine life and beachgoers. This marine heatwave, lasting over two months, is linked to a warm, dry spring and a high-pressure system. Scientists warn of potential disruptions to marine ecosystems and predict that such heatwaves may become more frequent due to climate change. The UK may face an even hotter summer ahead, with forecasts indicating a higher likelihood of extreme temperatures.