Reviewed by Emily Carter, MSc, RD
Registered Dietitian & Hydration Research Specialist. Emily holds a Master of Science in Human Nutrition and has spent over a decade translating nutrition research into practical, evidence-based guidance for everyday health and athletic performance.
Quick answer: In most public and gym saunas — always sit on a towel, shower before entering, keep conversation quiet or stay silent, ask before pouring water on the rocks, do not use your phone, and leave the space as clean as you found it. Finnish sauna culture values respect, quiet contemplation, and shared heat — understanding these norms ensures a positive experience for everyone in the room. Use our sauna hydration calculator to personalise your fluid intake.
Why Etiquette Matters in the Sauna
Sauna is one of the oldest wellness traditions in the world. Finnish culture treats the sauna as a sacred space — a place for physical and mental restoration, honesty, and equality. When you share a sauna with others, you are entering a space with its own social contract. Following the conventions protects everyone's experience and keeps public saunas pleasant environments worth using.
Most etiquette failures come from not knowing the rules, not from deliberate disrespect. This guide covers what you need to know for any public sauna — whether it is a gym sauna, a spa, a bathhouse, or an event like the Mammoth Mug Sauna Rave at NRG Toronto.
The Non-Negotiables
Always Sit on a Towel
This is the single most universal sauna rule across every culture and facility. Sit on a clean towel placed between you and the wooden bench. Never sit directly on the wood — sweat and bacteria transfer directly to a surface that others will also use. Many facilities provide disposable bench covers; if yours does not, bring a dedicated sauna towel. This rule is also about basic hygiene for yourself — the wood can harbour bacteria from previous users.
Shower Before Entering
Shower with soap before entering a shared sauna. This removes lotions, perfumes, deodorants, sunscreen, and surface bacteria that would otherwise sweat into the shared air of an enclosed space. Most European bathhouse facilities require a pre-sauna shower; North American gyms often do not enforce it but the principle applies regardless. If you have been exercising, shower before the sauna.
No Strong Scents
Perfumes, colognes, heavily scented body products, and essential oil-heavy skincare are inappropriate in a shared sauna. In an enclosed, heated space, scents intensify dramatically. What seems subtle at room temperature can be overwhelming at 90°C. Arrive at the sauna clean but unscented.
No Phones
Phones do not belong in the sauna — they are a distraction that breaks the shared contemplative atmosphere, they may record other users without consent, and the heat can damage electronics. If you need a timer, bring a dedicated watch or use the facility clock. Leave your phone in the changing room or locker.
The Steam Question: Asking Before Pouring
In a Finnish sauna with rocks (kiuas), adding water to the rocks creates löyly — steam — which intensifies the perceived heat dramatically. The etiquette rule is simple: always ask others in the sauna before adding water to the rocks. Some people are at their heat tolerance limit; adding steam can force them out involuntarily.
If someone is already in the sauna when you enter, ask: "Is it alright if I add some water?" If you are alone, pour freely. In a full sauna, let the most experienced person or the person who has been there longest take the lead on steam decisions.
Space and Positioning
- Do not crowd. Leave reasonable space between yourself and other users. In a small sauna, this means choosing the bench furthest from others if multiple options exist.
- Lying down. Lying on a bench is acceptable in a private or quiet sauna, but reduces the space available for others. Sit if the sauna is full or has other users.
- Bench positioning. The upper benches are hotter. Experienced users often gravitate there. Beginners and those new to the session typically start lower. Do not claim prime bench positions for extended periods if others are waiting.
- Do not block the door. Sit away from the entrance so others can exit without needing to move you.
Volume and Conversation
Finnish sauna culture values silence or quiet conversation. Many people use the sauna as a mental reset — a phone-free, low-stimulation space for genuine rest. The convention is: match the energy of the room. If others are quiet, stay quiet. Light conversation is generally fine; loud conversations, phone calls, or group discussion of topics better suited to a boardroom are not.
Entering a sauna where others are already seated: a simple acknowledgment (a nod, a quiet "hello") is appropriate. Launching into conversation is not.
Entering and Exiting
- Open the door quickly and close it quickly to retain heat
- If the sauna is occupied, knock lightly or pause at the door to ensure the space is appropriate before entering
- Exiting mid-round to cool down is completely normal — just exit quietly and leave others undisturbed
- Do not open the door repeatedly — each opening loses heat and disrupts those inside
Hygiene After Your Session
- Remove your towel from the bench when you leave
- If you perspired heavily on the wood, wipe it down if the facility provides cleaning materials
- Shower after your session before using shared pools or relaxation areas
- Do not leave personal items (water bottles, bags) in the sauna room
Cultural Variations
Sauna etiquette varies across cultures and facilities:
- Finnish and Nordic saunas: Clothing is often optional in private and family contexts; swimwear standard in mixed public settings. Nudity in single-sex saunas is common and unremarkable.
- German and Austrian saunas: Often textile-free (clothing not permitted); towel mandatory on bench. Visitors wearing swimsuits in textile-free facilities are the ones breaking etiquette.
- North American gym saunas: Swimwear standard. Rules more explicitly posted. Generally more casual atmosphere.
- Korean jimjilbang: Sex-segregated; gender-specific traditional sauna attire; specific cleaning protocols for communal areas.
When in doubt about the norms at a specific facility — read the posted rules, observe how others are behaving, and ask staff if uncertain.
Hydration Etiquette
Bringing a water bottle into the sauna is acceptable at most facilities. Keep it on the floor or lower bench, not on the upper bench where it takes prime space. Use a leak-proof bottle — spills on wooden benches or floors are a hazard and a courtesy issue.
The Mammoth Mini 1.5L sits neatly beside your position without taking excessive space. For the full guide on what to bring and how to prepare, see our sauna gear list and beginner guide to sauna. For the sauna fluid replacement protocol, see our guide on sauna dehydration.
- Beginner Guide to Sauna: Everything You Need for Your First Session
- What to Bring to a Sauna (The Practical Gear List)
- 7 Sauna Health Benefits Backed by Science
- Sauna Dehydration: How Much Fluid You Lose
- Sauna Rave Toronto: NRG Event Guide
Frequently Asked Questions
Do you have to be naked in a public sauna?
It depends entirely on the facility and culture. North American gym and spa saunas typically require swimwear or a towel. European saunas — particularly German, Austrian, and Finnish — often have textile-free zones where clothing is not permitted. Always check the facility's specific policy. In mixed-culture facilities like those in Toronto, swimwear is standard unless otherwise explicitly stated. The beginner guide to sauna covers what to wear in detail.
Is it rude to talk in a sauna?
Light, quiet conversation is generally acceptable. Loud conversation, phone calls, or sustained group discussion is considered poor etiquette in most sauna traditions. The convention is to match the energy of the room — if others are sitting quietly, keep conversation minimal. Finnish sauna culture specifically values quiet contemplation and treats silence as companionable rather than awkward.
Can I bring food or drinks into a sauna?
Water or a sports drink in a leak-proof bottle is appropriate. Food is not. Eating in a sauna contaminates the shared space with odours and creates cleanup issues. Coffee, alcohol, and sugary drinks are poor choices for sauna hydration — stick to water or electrolyte supplements. For the full hydration guidance, see our guide on post-sauna rehydration.
What should I do if someone is breaking sauna etiquette?
For minor issues (loud conversation, phone use), a polite direct comment is appropriate — most violations are from ignorance rather than deliberate disrespect. For hygiene violations (sitting without a towel, not showering), mention it to facility staff rather than addressing it yourself. For serious issues (harassment, aggressive behaviour), report immediately to staff. The sauna should be a safe, respectful shared space for everyone.
Is it acceptable to exercise or stretch in a sauna?
Light stretching in a private or empty sauna is generally fine. Active exercise, vigorous stretching that takes up space, or any exercise that increases sweat dramatically beyond normal is inconsiderate in a shared sauna. Save exercise for the gym floor. The sauna is for passive heat exposure — the heat does the work.
Is it rude to talk in a public sauna?
This depends entirely on cultural context and facility type. In Finnish culture, sauna is traditionally a quiet, meditative space — talking is acceptable but lengthy conversations are considered poor form. In North American gym saunas, quiet conversation is generally fine but phone calls, loud voices, and playing music without headphones are universally frowned upon. The safest rule: match the energy of the room. If others are sitting quietly with eyes closed, respect the silence. If people are already chatting, light conversation is welcome.
What should you do if someone is breaking sauna etiquette?
For minor issues (phone on speaker, taking up too much bench space), a polite direct request works best — most people are unaware they are causing discomfort. For hygiene issues (not sitting on a towel, dripping sweat on shared surfaces), mention it casually or speak to gym staff. For serious issues (aggressive behaviour, inappropriate conduct), leave the sauna and report to management. Avoid passive-aggressive reactions like sighing loudly or slamming the door — in an enclosed hot space, direct conflict escalates faster than in normal environments.
Are phones ever acceptable in a sauna?
Most facilities prohibit phones in saunas for two reasons: privacy (cameras in a space where people may be partially undressed) and equipment damage (heat degrades batteries and screens). Even in facilities that do not explicitly prohibit phones, using one is considered poor etiquette — the glow of a screen disrupts the relaxation environment for others, and notifications break the silence. If you need to time your session, bring a waterproof watch or use the wall clock. Leave your phone in your locker.
