Learn about the legend that started it all
Reports of a large, serpent-like creature in Lake Windermere date back to the 1950s. However, local legends suggest that stories of strange aquatic beings lurking in the lake may have circulated for centuries. Early accounts were often dismissed as tales or exaggerations, but the consistency of sightings, especially near Belle Isle, began to stir curiosity.
Belle Isle, the lake’s largest island, is surrounded by some of the deepest parts of Windermere, plunging over 200 feet. These hidden depths provide a perfect sanctuary for a large, elusive creature. Scientists studying similar ecosystems have noted how deep lakes can harbour species that remain undiscovered due to their reclusive behaviour and vast, inaccessible habitats.

Belle Isle is the largest of 18 islands on Windermere
Belle Isle has been a focal point for many sightings of Bownessie. The island is situated near some of Windermere’s deepest underwater trenches, which could serve as a hidden habitat. Sonar scans conducted during research expeditions have occasionally revealed large, unexplained objects moving in these depths. While sonar can sometimes misinterpret submerged logs or thermal layers, the objects’ movement patterns suggested something alive.
Marine ecologist Dr. Alan Whitmore has speculated that Windermere's cold, oxygen-rich waters might support an unknown species of giant eel. Giant eels, while rare, have been documented in other lakes worldwide. These creatures often exhibit serpentine movements and can grow to remarkable lengths in secluded environments. While no giant eels have been officially recorded in Windermere, the possibility remains scientifically plausible.
‘Ripples in the water, thought by some to be caused by the mysterious creature.’ (Picture by Colin Honour.) Words and photo courtesy of Westmorland Gazette.




In 2011, Bownessie captured headlines again after a flurry of sightings within a few weeks. Witnesses described a long, dark creature moving through the water with remarkable speed. One family claimed to have observed it from multiple angles as it surfaced briefly near their boat before disappearing into the depths near Belle Isle.
These sightings brought renewed scientific interest. Researchers deployed advanced sonar equipment around Belle Isle and conducted night-time surveys with thermal imaging cameras. Although the creature itself was not conclusively documented, several anomalies were recorded. Unusual wake patterns and underwater disturbances were consistent with the movement of a large, submerged animal.
Misidentification or Unknown Species?
Sceptics continue to argue that Bownessie sightings could be the result of misidentifications. Boat wakes, swimming otters, or floating debris could explain some reports. However, the sheer number of consistent accounts over decades, combined with the photographic and sonar evidence, makes it difficult to dismiss the legend outright.
A leading hypothesis is that Bownessie could be a relic species—a survivor from a prehistoric era. Lake Windermere was carved by glaciers during the last Ice Age, leaving behind deep, cold waters that could theoretically sustain a species isolated from the outside world.




Despite the scepticism, the legend of Bownessie continues to intrigue scientists, locals, and visitors alike. The combination of Windermere’s vast depths, unexplained sonar readings, and consistent sightings near Belle Isle keeps the mystery alive. Belle Isle itself, with its dense woodland and serene surroundings, seems almost to guard the lake’s secrets.
For now, Bownessie remains a tantalizing enigma. Whether a misunderstood natural phenomenon or a hidden creature, the serpent of Belle Isle fuels the imagination and reminds us of the mysteries that still lurk in the natural world. Perhaps, somewhere in the shadowy depths of Windermere, the truth awaits discovery.
The Loch Ness Monster look alike, Bownessie, in Lake Windermere. (http://www.mirror.co.uk/news/weird-news/loch-ness-monster-creature-photographed-4204637)
