An outdoor infrared sauna turns your backyard into a private spa retreat — but it faces rain, sun, and temperature swings that indoor units never do. Here's everything to check before you buy, and how to keep it lasting for years.
Why choose an outdoor sauna?
Space and experience. Outdoor models free up your interior and deliver a genuine resort feel — stepping outside into a cedar or mahogany cabin under the open sky. They also come in larger sizes, from 1-person retreats to 5-person cabins for the whole family.
Weatherproof wood matters most
Not all sauna wood survives outdoors. Look for:
- Mahogany — Sitvera's mahogany is sourced from the Central African coast for its resistance to humid, coastal-style heat and weather. Ideal for outdoor exposure.
- Western Red Cedar — naturally moisture- and rot-resistant, with a premium look and aroma.
Avoid indoor-only woods like hemlock for outdoor placement.
Roof and drainage design
A quality outdoor sauna uses a gabled "American roof" that sheds rain and snow instead of letting it pool. Good drainage is one of the biggest factors in how long an outdoor unit lasts.
Foundation and placement
- Set the sauna on a level, solid base — a concrete pad, pavers, or a deck rated for the weight.
- Avoid placing it directly on soil where moisture collects.
- Allow clearance around the cabin for airflow and access.
Electrical for outdoor units
You'll need weather-safe outdoor electrical access. Smaller units may run on 120V; larger cabins can require a dedicated circuit. Confirm the spec and have any outdoor wiring done by a licensed electrician.
Protect your investment with a cover
This is the step that pays for itself. A waterproof outdoor sauna cover shields the wood and glass from rain, UV, and debris between sessions, dramatically extending the cabin's life.
Ready to build your backyard retreat?
Browse every outdoor model in the outdoor sauna collection, and read our indoor vs outdoor guide if you're still deciding.