Autumn Wild Swimming: Loch Arkaig & Eas Chia-aig Falls
There’s something a little bit magical about the drive to Loch Arkaig, one of the most stunning wild swimming locations in the Scottish Highlands. After a sharp turn away from the exposed shores of Loch Lochy, the single-track road meanders through the intriguingly named Mile Dorcha — “The Dark Mile.” Towering, interwoven trees arch overhead, while old stone walls carpeted in vibrant green moss guide you deeper into this atmospheric corner of the Highlands.
Crossing a mossy stone bridge, the road suddenly reveals Eas Chia-aig Waterfall, cascading down a steep valley and framed by the golden hues of autumn. It’s a truly enchanting scene — and a favourite among open water swimmers in Scotland looking for a touch of adventure.
The Witches Pool – A Chilly Autumn Dip
Stepping into the dark, churning water beneath Eas Chia-aig, it’s easy to understand why this place is also known as The Witches Pool. The surface bubbles and swirls like a cauldron — an apt setting for a spellbinding autumn wild swim.
In October, the flowing water is cold enough to take your breath away. I only allow myself a brief dunk this time, sticking close to the edge and steering clear of the main cascade’s powerful flow. Even a short swim here feels exhilarating — the perfect reminder of why we love cold water swimming in Scotland. I can’t wait to return when the flow is gentler and the water more inviting for a longer swim.
Exploring Loch Arkaig – A Wild Swimmer’s Paradise
Just a few hundred metres further along the road, Loch Arkaig comes into view. Steep-sided and stretching 12 miles from end to end, this glacial loch is one of the most breathtaking open water swimming spots in the Highlands. Its glassy surface mirrors the rich autumn colours of the surrounding woodland — a scene that feels almost otherworldly.
The ancient Caledonian pine forest that surrounds Loch Arkaig is one of the UK’s last remaining fragments of native pinewood. Oak, juniper, hazel, aspen and alder line the shores, creating a kaleidoscope of amber, gold and crimson. This area is part of Scotland’s rare Atlantic temperate rainforest, alive with lichens and mosses clinging to the trees — including ostrich plume moss and lungwort.
For anyone who loves wild swimming in nature, this is a paradise of colour, texture and tranquillity.
Into the Water – Wild Swimming in Autumn
At the west end of the loch, the atmosphere shifts. The landscape opens up into rugged moorland, with steep mountains rising on all sides. Stags roar from the hillsides — a haunting soundtrack to an already wild setting. From here, paths lead into Knoydart, one of Britain’s last true wilderness areas, with nearby Loch Morar — Scotland’s deepest loch — just over the mountain pass.
We turn back to our favourite entry point for a swim. The water temperature reads 9°C — positively balmy compared to our regular Cairngorms swims, which hover around 7°C at this time of year!
Slipping into the loch, the water feels smooth and silky against the skin. We paddle out towards the calmest stretch, surrounded by breathtaking reflections of autumn trees. The loch drops to depths of over 90 metres, dark and mysterious beneath us. I try not to think about what might be lurking below… until something brushes my foot! A startled splash, a nervous laugh — and then we’re both cackling uncontrollably when it turns out to be just a floating stick.
Post-Swim Bliss – The Best Part of Wild Swimming in Scotland
We emerge refreshed and buzzing with energy, skin tingling, faces glowing. Layers go on quickly, flapjacks and cake disappear even faster, and hot water bottles are tucked into our jackets for the journey home.
There’s nothing quite like that post-swim glow — the combination of cold water, beautiful surroundings, and the sheer joy of adventure.
A perfect autumn wild swim in the Scottish Highlands.
? Want to Explore These Wild Swim Spots (and More)?
If this little autumn adventure has ignited your sense of wander and wild water, I’d love to invite you to dive deeper — quite literally. In my book Swimming Wild in Scotland, I take you on a journey through dozens of Scotland’s most beautiful wild swimming locations, with maps, route details, access tips, seasonal advice, and personal stories from the water.
Want to find the precise entry point for Loch Arkaig or Eas Chia-aig, see suggested walking routes, or plan your next open-water swimming adventure? Swimming Wild in Scotland is your guide. Whether you’re a seasoned cold water swimmer or new to wild swimming, the book is packed with locations, safety notes, and inspiration to explore the Highlands, islands, coastal lochs and waterfalls.
? Grab your copy and start planning your next wild swim — your next autumn (or summer) plunge awaits.
