Loch Ness Swim 2018 Dive in to the largest body of fresh water in the UK and brave the chilly temperatures of Loch Ness. Our swims (subject to suitable weather conditions), involve teams of 6 people swimming in turn for one hour each from Fort Augustus to Loch End. The relay route is 22 miles long with depths of up to 230 metres. The loch's temperature is often not above 11 degrees so this event isn't for the faint hearted! Wetsuit and non-wetsuit boats are available. Dates - August 2018 (TBC) Watch our 2017 Loch Ness Relay Channel Swim: For more information please email Andrew or call him on 020 8420 8951. Looking for something else? Try our other swimming events.