Thinking of adding a backyard sauna to create a relaxing, meditative spa at home? Awesome decision! A sauna is a great way to unwind after a long day, relieve stress, and support your overall wellness. Beyond the health benefits, adding a sauna to your backyard spruces up your space, and turns it into your personal retreat center to enjoy all year-round.

In this article, we’ll walk you through the best backyard saunas, their key specs, pros and cons. We’ll also share the things you need to look out for before you purchase an outdoor sauna for your backyard.

But before we get started:

What Makes a Great Outdoor Sauna?

A great outdoor sauna (or any sauna at all) is one that follows the Finnish sauna design. Here are the top features:

1. Bench sits above the Sauna Heater:

The most important design principle in any sauna is how the bench is positioned and here’s why:

Naturally, heat stratifies in any enclosed space. The hottest air rises to the ceiling while cooler air settles near the floor. This creates distinct temperature zones inside the sauna: the air at floor level might be 140°F while the air near the ceiling reaches 180°F or higher. So, when you sit with your feet on the floor and your head near the top of the bench, your head feels hot while your feet remain cool. Yes, you read that right!

The best outdoor saunas place the top bench right above the sauna stones. This way, you’ll experience the same consistent heat from head to toe. And when water hits the stones and creates löyly (the soft, enveloping steam that defines the Finnish sauna experience), it rises directly into you rather than dissipating below you.

Here’s an example of a good bench placement in a sauna:

2. The Löyly Buffer:

When the bench height is right, the löyly buffer automatically falls into place. For context, the löyly buffer is the layer of hot, humid air that collects just above head level when you’re seated. It’s the richest zone of the sauna because it traps the steam at ceiling level and prevents it from escaping whenever someone enters or leaves the sauna.

Tip: The löyly buffer exists in the 41-48 inch space between your seated head and the ceiling.

3. Uses the Right Wood: 

In a quality sauna, when you close your eyes, you shouldn’t be able to pinpoint where the heater sits based on temperature alone. This is because of the type of wood used inside the sauna.

Basically, a high-quality sauna uses thermally modified wood that slowly absorbs heat and evenly radiates it throughout the space. These types of wood have quick heat-up times, are great insulators for heat, and are comfortable to sit or lie on.

Unlike metal or stone, which conduct heat rapidly away from the surface, wood retains heat near its surface while preventing heat loss through the walls. This creates faster heat-up times and more stable temperatures throughout your session. A well-insulated wooden sauna might reach optimal temperature in 30-40 minutes, while a poorly designed one can take an hour or longer.

Tip: Softwoods like aspen, alder, cedar, and spruce are often the best options for Finnish saunas because they have low density, good insulation, and are moisture resistant.

4. Quality Ventilation System: 

Without proper ventilation in a sauna, the air will feel stale and uncomfortable to inhale. It can even make you feel nauseous and you may end up not spending as much time as you’d love inside the sauna.

A great outdoor sauna with quality ventilation does the opposite. It ensures that the air inside the sauna remains fresh at all times by allowing natural inflow of oxygen and removing stale air. Here’s a pictorial description of how it happens:

Tip: Wood-burning saunas have a natural ventilation system through the combustion process. As the fire burns, it draws fresh air into the firebox and exhausts it through the chimney. Electric saunas, on the other hand, need a gravity-based or mechanical ventilation system to maintain air quality.

Now let’s get into the fun part:

Top Five (5) Outdoor Saunas for Backyard Spa

Here are the top five (5) outdoor saunas for your backyard spa and why we picked them:

1. Auroom Mira L 5 Person Outdoor Sauna – Best Overall Outdoor Sauna

The Auroom Mira L was made in Estonia and has gained lots of popularity in the US for good reason. This sauna is made from Nordic Spruce and comes in two colors – brown and black.

The interior is made from thermo-aspen wood, which is comfortable to sit in and cool to the touch. This is a huge plus if you prefer to spend your evenings with your loved ones inside the sauna. It also has a full glass front that opens up the space and ushers light in, giving the sauna an airy, modern feel without sacrificing your privacy.

One thing we love about this sauna is the height. Unlike most mass-produced saunas that have shorter head space, the Auroom Mira L sauna is 79 inches tall, which means it can accommodate taller bathers to sit comfortably and even change positions inside the sauna.

Another huge plus is the ventilation system. It comes with a gravity-based ventilation system, that is, the intake vent is under the sauna heater, and the exhaust vent is just above the right side of the sauna. This design creates a steady, natural airflow that keeps the air fresh and evenly heated, so every session feels comfortable and clean.

If you live in areas prone to rainfall or snow, the Auroom Mira L is equally built for you. The roof is slightly pitched so that it naturally directs rainwater and snow away from the structure to prevent damaging the wood.

Straight out of the box, you get an adjustable LED lighting embedded in the backrest of the sauna,  a bucket (+ ladle), a sauna pillow, a sand timer, and a thermometer as part of your package.

Keep in mind that the Auroom Mira L ships as a DIY kit, so you’ll have to assemble it yourself. The entire installation process takes about 8 hours to a full day with an extra hand.

Key Specifications:

• Capacity: 5 people
• Construction: CLT panels with thermally modified aspen interior
• Heater: Compatible with 9kW – 10.5kW electric heaters (sold separately)
• Assembly: Takes 8 hours with an extra hand

Pros:

• Superior thermal mass creates stable, efficient heating
• Thermally modified materials resist weather damage
• Flexible sizing through modular design
• Detailed assembly manual

Cons:

• Costs more than basic models

 

2. SaunaLife Cube CL7G – Best Budget-Friendly Outdoor Sauna

The SaunaLife Cube CL7G proves you don’t need to spend $15,000+ to get authentic Finnish sauna heat. This model uses thermo-spruce for the walls and thermo-aspen for the benches – the same thermally modified materials you’ll find in premium saunas that cost twice as much.

The thermo-aspen benches stay cool to the touch even when the sauna hits 180°F+, so you’re not dealing with wood that burns your back when you lean against it.

What makes this sauna stand out is how it handles the fundamentals without cutting corners. The interior height is 85.5 inches, providing proper clearance for the löyly to form above your head rather than right in your face. The full glass front also opens up the space completely and allows natural light to flood in during the day. You can enjoy the breathtaking outdoor view while you bathe inside the sauna.

In addition, the benches are contoured with arched backrests rather than flat slats. This seems like a minor detail until you’re 30 minutes into a session and realize you’re still comfortable instead of shifting around to find a better position.

Key Specifications:

• Capacity: 6 people
• Construction: Thermo-spruce walls, thermo-aspen benches
• Heater: 9kW electric heater included
• Assembly: DIY kit

Pros:

• Costs less than premium saunas offering the same quality
• Thermally modified wood for the interior and exterior
• Glass front for visual openness
• Easy to install

Cons:

• Will get too cramped for six people.

 

3. SaunaLife G6 – Best Pre-Assembled Outdoor Sauna

In case you want a plug-and-play sauna, the SaunaLife G6 is the way to go. Unlike DIY kits, where small installation mistakes can compromise performance, the G6 is built by skilled craftsmen in Northern Europe under controlled factory conditions. They assemble the panels and ensure everything works well before shipping it to you. This eliminates the guesswork and errors that come with DIY assembly.

The exterior uses fine-sawn spruce with a sleek, black-painted finish that gives it a modern look that fits into any backyard aesthetic. Step inside, and you get furniture-grade alder on every surface – the walls, ceiling, and both bench levels. Alder is naturally cool to the touch and stays comfortable throughout the sauna session, no matter how long it is. The benches are also ergonomically contoured to your body to provide even more comfort:

The walls are 7-1/16 inches thick to trap heat efficiently, so your heater doesn’t work overtime. Also, the thickness keeps your sauna sessions quiet, far away from traffic noise, neighbor conversations, or chatters if you have company.

Another standout feature is the built-in Bluetooth speaker system. The speakers are hidden from sight under the benches, and you can enjoy your favorite playlist while you bask in the heat.

Just like other saunas, the G6 features a full glass front that lets natural light in and opens up the space.

Key Specifications:

• Capacity: 5 people
• Construction: Factory-assembled
• Heater:5kW electric heater purchased separately
• Assembly: Delivered fully assembled, crane/forklift positioning required

Pros:

• Zero assembly required
• Factory quality control ensures proper sealing and fit
• Integrated Bluetooth audio system
• Dimmable LED lighting included
• Operational within hours of delivery
• Sits 5 people inside comfortably

Cons:

• Requires a crane or forklift for positioning
• Costs more than DIY alternatives
• The foundation must be perfectly level before delivery

 

4. Golden Designs Loviisa – Best Hybrid Outdoor Sauna

Some prefer traditional high-heat Finnish saunas while others find infrared’s gentler warmth more comfortable. The Golden Designs Loviisa features both heating technologies so users can choose their preferred experience whenever they want.

For the traditional heat, this sauna comes with the Harvia 6kW traditional stove. When you want authentic Finnish heat, you can turn on the heater, and ladle water over the hot stones to create rich, steamy löyly that warms your body evenly from head to toe.

When you want a calmer, immersive heat, switch to the infrared mode. The sauna comes with 11 full-spectrum infrared emitters (5 carbon PureTech panels and 6 near-infrared elements) that heat your body directly without heating the surrounding air as much.

Overall, the Golden Designs Lovissa is made from Canadian red cedar, including the walls, ceiling, benches, and door frame. Out of the box, you get built-in performance speakers, sandglass,  a bucket (+ ladle) and a thermometer,

Key Specifications:

• Capacity: 3 people
• Construction: All-weather exterior, Canadian red cedar interior
• Heaters: Harvia 8kW traditional stove + 11 full-spectrum infrared emitters (5 carbon panels + 6 near-infrared elements)
• Electrical: 240V/40AMP (requires certified electrician)
• Assembly: DIY kit

Pros:

• Dual heating systems accommodate different preferences
• Canadian red cedar with natural aromatics
• 11 full-spectrum infrared emitters for comprehensive coverage
• Harvia 8kW stove with built-in controls
• Touchscreen LED control panel with FM radio and Bluetooth
• Integrated performance speakers

Cons:

• Expect to pay more because of the hybrid heating system
• Consumes more energy than standalone traditional or infrared saunas.

 

5. Haljas Hele Mini Glass Sauna – Best Luxury Outdoor Sauna

Looking to transform your backyard to a modern spa? The Haljas Hele Nano Glass sauna is your best bet. This sauna uses double-glazed mirror glass as the primary building material. From inside, you see your surroundings clearly… the trees, sky, garden, whatever landscape you’ve positioned the sauna within. From outside, people see their own reflection and the mirrored environment.

The quality is A-grade, too.

The Hele Nano uses CLT (cross-laminated timber) panels for its structure. These are layers of solid wood stacked in alternating directions and bonded together. The result is a strong, well-insulated, lightweight frame.

Inside, the benches and walls are finished in thermo-alder, a heat-treated wood with a warm brown tone that stays comfortable to the touch, even when the sauna is hot.

Key Specifications:

• Capacity: 4 people (Mini model), larger sizes available
• Construction: Triple-glazed glass panels, thermally modified frame
• Heater: Premium electric heater with smart controls included
• Assembly: Professional installation required

Pros:

• Stunning architectural design that turns to your backyard focal point
• Triple-glazed glass maintains thermal efficiency
• Smartphone integration and smart controls
• Premium materials and finishes throughout

Cons:

• Costlier than saunas in the same range
• Glass requires more frequent cleaning to maintain its appearance

What to Look For When Purchasing an Outdoor Sauna?

Here are five things you should look out for when purchasing an outdoor sauna:

1. The benches should be above the heater

The bench positioning can make or break your sauna experience. Ideally, you need the upper bench sitting surface level with or above the heater’s stone chamber. This keeps your entire body in one temperature zone, rather than having a hot head and cold feet.

Bench depth should also be at least 20-24 inches so you can sit with legs extended or lie down during longer sessions. Anything under 18 inches forces you to sit upright, which can get (really) uncomfortable.

2. Go for flat ceilings

The shape of the interior ceiling controls where your hottest air ends up. Basically, the best air collects at the highest point, so you need to make sure the ceiling is right above your bench but not far from where you are.

For instance, cathedral ceilings and barrel vaults that peak in the center look pretty, but they trap heat in the space far away from where you’re sitting and you won’t get to enjoy the rich steam (loyly) like you should. The best design should slope gently from the back wall toward the heater to allow the heat to naturally find its way back toward you. Flat ceilings work fine in this case.

Tip: The exterior roof differs from the ceiling on the inside. Basically, you only need to ensure the sauna roof is designed to shed water without leaking.

3. Choose the Right Sauna Heater 

The heater is the heart of your sauna, and it determines if you get to experience the Finnish sauna culture or not. There are two major heaters you can choose from:

• Electric heaters

Electric heaters are the most convenient for residential outdoor saunas. They heat up quickly, are easy to operate, and allow precise temperature control. Models from brands like Harvia and HUUM are reliable and have smart features such as Wi-Fi control and programmable timers.

What matters most is stone capacity. Heaters with 40-100+ kg of stone produce softer, more enveloping heat than minimal-stone models.

• Wood-burning stoves

Wood-burning stoves deliver the most authentic Finnish sauna experience. The ritual of tending the fire, the subtle aroma of wood smoke, and the dynamic, living heat create an atmosphere electric heaters can’t replicate. Again, HUUM and Harvia are top brands you can opt for.

Overall, whichever heater you choose for your sauna depends on your preferences.

4. Check out the Ventilation System 

As discussed earlier, the ventilation system in a sauna separates a quality sauna from a subpar one. comfortable, long-lasting saunas from stuffy, short-lived ones. Good ventilation brings in fresh oxygen, removes excess humidity, and helps distribute heat evenly throughout the room. Without it, the air can feel heavy, stale, and uncomfortable to breathe.

Look for setups that use either a gravity- or mechanical-ventilation system.

For context, a gravity-based system has two or three vents in the sauna: the intake, the exhaust, and the adjustable drying vent. Its most common type of ventilation system used in saunas.

Mechanical ventilation systems, on the other hand, use fans to move air through the sauna. This creates more consistent airflow, reduces humidity, and makes the sauna dry up faster after use. It’s the best and most effective ventilation system.

5. Check out the Aesthetics

Once you’ve sorted out the bench height, ceiling clearance, heater quality, wood species, and ventilation, you also want to ensure it meets your taste and matches your home design.

You’ll find different sauna designs in the market, including traditional Nordic cabins with simple forms and vertical wood siding and modern styles with large glass panels, dark finishes, and architectural lighting. For example, a modern home with large windows and minimalist landscaping may look more cohesive with a sleek glass sauna. Meanwhile, rustic properties, wooded lots, or homes with timber elements often pair beautifully with a classic cabin-style structure.

At the end of the day, the right sauna is the one you’ll enjoy looking at every day and sitting in for years to come.

Making Your Final Decision

Choosing your outdoor sauna ultimately comes down to matching the right features to your specific situation. Before you make a choice, consider your climate conditions, available space, and budget.

Need help choosing the right backyard sauna for your home spa? Visit Premium Saunas and chat with our team.