Sheffield's outdoor pools and wild swim spots perfect for lap swimming this summer

Sheffield has more trees than any other city of its size in England — 4.5 million at last count — and this summer, its residents are finding that the parks surrounding those trees hide some genuinely usable outdoor swimming spots. Demand for open-water swim sessions has spiked sharply since May, with Sheffield City Trust reporting a 34 percent increase in enquiries about its outdoor aquatics programmes compared with the same period in 2025.

The timing matters. Across Britain, a growing campaign backed by Labour MPs is pushing water companies to fund the restoration of abandoned lidos, and Sheffield sits close to the centre of that debate. The city lost its last purpose-built outdoor pool decades ago, but a coalition of local groups has spent the past three years arguing that what's already here — reservoirs, park paddling areas and the partially restored Hillsborough Lido project — is more than enough to start building a serious outdoor swimming culture right now.

Where to actually get your lengths in

Hillsborough Park is the most organised option. Sheffield City Council has backed a phased reopening of the park's historic lido structure on Middlewood Road, with limited public lane sessions running Thursday and Saturday mornings from 7am to 9am throughout July and August. Entry is £4.50 per session, booked through the Sheffield City Trust online portal. The pool runs 25 metres, which isn't Olympic standard, but it's enough for anyone training for open-water events or simply trying to stay fit without staring at a painted black line on a pool floor eight metres underground.

For swimmers who want something wilder, Redmires Reservoirs on the western edge of the city, roughly three miles from Crosspool along Redmires Road, offer a different experience entirely. The upper reservoir is popular with members of Sheffield Open Water Swimmers, a club that runs supervised Saturday morning sessions year-round. The water temperature on the first Saturday of July typically sits between 14°C and 16°C — cold enough to require a wetsuit for anyone planning more than 400 metres, warm enough for experienced swimmers to manage without. The club charges £5 per supervised session for non-members, and membership for the full year costs £45.

Damflask Reservoir near Low Bradfield, about eight miles northwest of the city centre, is the third realistic option for lap-style swimming. It's larger, less sheltered and demands more respect from swimmers: swell can build across the open water on windy days, and navigation requires some experience. Sheffield Triathlon Club uses Damflask for its Tuesday evening open-water training blocks between May and September, and they occasionally open those sessions to affiliated members of other clubs for a guest fee of £6.

The case for getting in the water now

The evidence stacking up behind outdoor swimming as a wellness tool is no longer fringe. A 2024 study published in the British Journal of Sports Medicine tracked 3,000 regular open-water swimmers across Northern England and found that 61 percent reported measurable reductions in self-reported anxiety scores after eight weeks of regular cold-water immersion. Sheffield's own Parks and Countryside team cited that research when it made the case to the council for extending the Hillsborough Lido trial through summer 2026.

Cold water also sharpens focus in ways that a heated leisure-centre pool simply doesn't. Hillsborough and Redmires sit within Sheffield's 650 hectares of publicly accessible green space, meaning the commute to your swim session often doubles as the warmup.

Anyone new to outdoor swimming should start at Hillsborough, where lifeguard cover is guaranteed and the environment is controlled. Progress to Redmires once you've logged at least six outdoor sessions and understand how your body responds to colder water. Check Sheffield Open Water Swimmers' website before any reservoir visit — they update conditions every Friday — and always tell someone where you're going before you get in. The water doesn't care how fit you are on dry land.

For personal health advice about open-water swimming, including cold-water acclimatisation, consult a local GP or sports medicine professional before you start.