These are the saunas where the cold plunge is part of the design, not an afterthought. On-site tubs, troughs, or dip pools mean the hot–cold–rest cycle is available every session without planning the open-water swim yourself. Plan 90 minutes minimum to run the cycle properly rather than rushing a single long sit.
In London, 16 of the curated saunas fit this cut. See the full London guide for every venue in the city, or keep scrolling for just the sauna with a cold plunges.
Every sauna with a cold plunge in London

&Soul Shoreditch
££London, United Kingdom

1Rebel Reset - Chelsea
£London, United Kingdom

1Rebel Reset - Clapham
£London, United Kingdom

1Rebel Reset - Euston
£London, United Kingdom

1Rebel Reset - High Street Kensington
£London, United Kingdom

1Rebel Reset - Holborn
£London, United Kingdom

1Rebel Reset - Leadenhall
£London, United Kingdom

Arvo Sauna
£London, United Kingdom

Banya No.1
£££London, United Kingdom

Community Sauna Baths - Camberwell
£London, United Kingdom

Community Sauna Baths - Hackney Wick
£London, United Kingdom

Community Sauna Baths - Stratford
£London, United Kingdom

Community Sauna Baths - Walthamstow
£London, United Kingdom

Lowlu - Kentish Town
£London, United Kingdom

Lowlu - Wandsworth
£London, United Kingdom

Sauna Social Club
£London, United Kingdom