Minus is Portsmouth's first purpose-built sauna, cold plunge and social wellness space.

Designed with intention, Minus brings together traditional Finnish sauna culture with cold water immersion in a calm, welcoming environment where people can slow down, recover and reconnect.

Whether you're visiting alone or with friends, Minus is a place to leave the outside world behind - even if only for an hour.

Each session lasts one hour.

You'll move between the sauna, cold plunge pools and relaxation areas at your own pace. There is no set routine, and no pressure to follow a particular path.

Some guests spend longer in the sauna. Others prefer more frequent cold plunges. Everyone experiences Minus differently. The focus is on you, minus the distractions.

Minus is for anyone looking to relax, recharge, recover, unwind or simply enjoy an hour away from everyday distractions.

Some come to recover after training.

Others come to relax after work.

Many visit with friends or partners as a different way to spend time together.

In the sauna, everyone is equal.

Each session lasts 60 minutes.

This gives you plenty of time to enjoy the sauna, cold plunge pools and relaxation spaces without feeling rushed.

We recommend you arrive 5-10 minutes before your session starts, so you can get ready, hydrate and begin to unwind.

For one-off sessions, simply bring swimwear, a towel and sandals or flip flops. Or add them to your booking.

For members, we’ll provide everything you need including towels and complimentary recycled cork slippers.

Everyone will be given a sauna mat to sit on, and refreshments are always available.

Our Finnish sauna is typically maintained between 90- 95°C, while our cold plunge pools are kept between 3–9°C, depending on the season and operating conditions. We also have traditional bucket showers as an alternative way to cool down between sauna sessions.

You choose how long you spend in each environment, and there is never any expectation to push yourself beyond what feels comfortable.

Saunas have been part of Finnish culture for centuries.

Alternating between heat and cold has a long history in Nordic countries, where it is valued for relaxation, recovery and social connection.

Today, research continues to explore the effects of sauna and cold water immersion on health and wellbeing. While individual experiences vary, many people report feeling calmer, refreshed and more energised after a session.

At Minus, we're less interested in trends than tradition. Finnish sauna culture has endured for centuries, not because it’s fashionable, but because it has always been a part of everyday life.

Minus is a shared wellness space where everyone is welcome.

Our sauna is mixed because we believe the experience is about relaxation, respect and community - not appearance or performance.

Swimwear is worn throughout the facility, and we've designed the space to feel welcoming and comfortable for everyone.

In the sauna, everyone is equal.

Absolutely.

You don't need any previous experience to enjoy Minus.

Our sessions are designed so you can move between the sauna, cold plunge pools and relaxation spaces at your own pace. There is no pressure to follow a particular routine or stay in the heat or cold for a certain length of time.

If it's your first visit, we'll happily explain how most people enjoy contrast therapy and answer any questions before your session begins.

Many members visit once a week, while others come several times. There is no "correct" frequency - it's about finding what works for you, and allowing it to become part of your routine.

We recommend booking your session online in advance to guarantee your preferred day and time.

While we may occasionally have walk-in availability, booking ahead is the best way to ensure your place is reserved. Sessions always start and finish on the hour.

If you're planning to visit regularly, becoming a member also gives you access to exclusive member pricing and priority booking.

Absolutely.

If you're planning to make sauna and cold water therapy part of your routine, becoming a member offers the best value.

We offer flexible membership options to suit different lifestyles, from occasional weekly visits to unlimited access.

Memberships also include a range of additional benefits, with our Unlimited Membership offering complimentary flops (the worlds most environmentally friendly flip-flops), guest passes and more.

You can explore all of our membership options on our Memberships & Pricing page.

Yes - but only at selected times.

While most sessions at Minus are shared, we also offer private bookings for groups, celebrations and corporate wellbeing events, subject to availability.

If you're interested in hiring the space exclusively, we'd love to hear from you. Contact us and we'll talk through the options.

Whether you're marking a milestone, bringing colleagues together or simply gathering with friends, we'd be delighted to help create something memorable.