Lake Rua is a freshwater swimming spot set within Harewood's Roto Kōhatu Reserve in northern Christchurch, rated 4.5 across 304 reviews.
The public lake is a popular destination for open-water swimming, dragon boating, sailing, and kayaking, alongside lakeside walking tracks. Because freshwater lakes have no lifeguards on patrol, swimmers need to watch for submerged branches, stick to designated swim zones, and monitor summer water quality testing. Regulars know to give open-water spots at least 48 hours to clear after heavy rainfall and to keep dogs leashed along the water's edge to protect local birdlife.
It remains one of the city's favourite natural swimming spots for anyone looking to cool off in Harewood.