Thames Valley Police said the death was “unexplained but not suspicious”.
They also said the deceased teenager was a 14-year-old boy, but there are no further details on the Kent boy.
Young people have also died in water-related incidents in Lincoln, Halifax, Rotherham, Warwickshire, Cheshire, Farnborough and Lancashire, along with a man in his 60s in Cornwall and a woman in her 70s in Wales.
Several of the victims have been named and tributes paid, while others have not yet been formally identified by police.
