On the edge of one of London’s most famous expanses of green space lies an open‑air swimming pool that has been drawing locals and visitors for generations. From summer heatwaves to frosty midwinter mornings, this celebrated pool first opened in the late 1930s as part of an ambitious civic project to bring seaside leisure to the capital’s doorstep.
Few places capture London’s community spirit and love of swimming quite like this lido. Tucked at the edge of Hampstead Heath in north London, this iconic outdoor pool is both one of the best places to cool off during a heatwave and a treasured piece of the city’s architectural heritage.
Built with striking Art Deco lines and generous proportions, it was and remains – a symbol of Londoners’ enduring love for outdoor recreation.
London’s historic open-air swimming gem
Only after you step through its gates does its full scale become clear: 61 metres in length, 27 metres wide, and able to accommodate thousands. Today, it’s one of the few unheated lidos in the city to remain open year‑round, its waters attracting hardy cold‑water enthusiasts in winter and families seeking a sunny escape in summer.
The pool is, of course, the Parliament Hill Lido – a north London landmark situated by Hampstead Heath, brimming with history and community spirit.
Parliament Hill Lido first opened to the public on 20 August 1938, the most ambitious and expensive of the thirteen lidos built by the London County Council between the wars.
Designed by architects Harry Rowbotham and T.L. Smithson, the pool was part of a bold plan to “bring the seaside to the city” and encourage open-air recreation for all. The cost of construction, £34,000, reflected not only its size but the progressive ambitions of the project – making it a true landmark of pre-war leisure culture.
One of London’s Art Deco lidos
From the beginning, Parliament Hill Lido stood out for its impressive scale. The main pool measures 61 meters (200ft) long and 27 meters (90ft) wide, holding some 650,000 gallons of water – sample space for over 2,000 swimmers at a time.
Terraces around the pool provided sunbathing spots and viewing areas for diving galas. Originally, there were dramatic diving boards, slides, and a café, and its symmetrical design ensured equal changing provision for men and women – a progressive feature at the time.
The lido’s classic Art Deco lines remain a defining feature, and its recent upgrades most notably the installation of a stainless-steel pool lining in 2005, have preserved both its appearance and function for new generations of swimmers. Today, the lido also boasts a paddling pool for children, sun terraces, a café, showers, and communal areas for year-round enjoyment.
A Grade II listed London lido open every day of the year
Parliament Hill Lido is famed for being open every day of the year. It is one of only three unheated outdoor pools in London open for winter swimming, along with Brockwell and Tooting Bec lidos.
Summer months bring longer opening hours and crowds enjoying the warm weather, while colder months draw hardy regulars for bracing dips – making it a hub for London’s growing “cold water swimming” community.
Recognising its architectural and social importance, Parliament Hill Lido was designated as a Grade II listed building in January 1999. This important status ensures the protection and sensitive maintenance of both its historic buildings and the open-air pool itself.
More than just a pool, Parliament Hill Lido remains a beloved community gathering spot and entry point to the open-water swimming culture that thrives on Hampstead Heath. Swim groups like the United Swimmers’ Association of Hampstead Heath, together with countless casual users, ensure the pool is alive with activity – no matter the season.
Whether on a hot summer’s day or a frosty winter morning, a swim at Parliament Hill Lido is a uniquely London experience, offering the simple joys of fresh air, exercise, and connection in one of the city’s most historic settings.
