The Best Public Saunas in London for 2026, Tested and Ranked

Baltic Spa is a practical guide to sauna and cold-water culture in Britain. We map the public saunas, traditional banyas and wild coastal saunas you can actually visit, from converted horseboxes on a Cornish beach to city bathhouses and members’ clubs, with details on heat, sessions, cold plunges and how to book.

It’s built for people who already take this seriously: cold-water swimmers, regular sauna-goers, gym and recovery users, and homeowners weighing up a garden sauna or a cold plunge at home. If you want to find a löyly-style steam session near you on a Saturday, or work out whether a barrel sauna or an ice bath is worth the money, you’re in the right place.

Alongside the directory you’ll find buying guides we’ve actually thought through: home saunas, barrel and outdoor saunas, and ice baths, with the running costs, install realities and trade-offs spelled out. No hype, no inflated star ratings, just clear advice on where to go and what to build.