UK marine science hub for coastal and deep-ocean research
The UK’s seas are experiencing an extreme marine heatwave, with temperatures averaging 2C above normal and pockets 4–5C hotter. The pattern follows a Europe-wide heat dome, and global sea surfaces have topped records for the time of year. Scientists warn of mass-mortality risks for marine life and shifts in species distribution.
The annual UK climate report shows that 2025 was the warmest year on record, with a shift of warmer conditions moving north and uphill. Days over 30C and nights over 18C have quadrupled in London, while rainfall fell sharply and droughts became more common. Authorities warn that extreme heat, sea levels, and water shortages will shape policy and daily life ahead.
New satellite analysis shows Arctic winter sea ice extents have fallen sharply in 2025 and 2026, reversing a perceived pause and signaling ongoing warming. Researchers say the drop is unusual but plausible under current Arctic warming, with potential implications for weather patterns far south.