Can You Use Your Outdoor Sauna in the Summer?

Picture an outdoor sauna, and you probably see snow, steam rising off the cedar, a frozen yard, and someone dashing back inside in a towel. That image is exactly why so many Ontario homeowners hesitate before buying an outdoor sauna. Why install something you’ll only use a few months out of the year?

The good news is that an outdoor sauna isn’t just a winter appliance. It’s a four-season one, and the summer benefits are just as great as the winter ones. So much so that skipping warm-weather use means leaving much of your sauna investment on the table.

Here’s how to make the most of your outdoor sauna this summer.

Can You Use an Outdoor Sauna in Summer? Yes, and People Have for Centuries

The answer comes from Finland, where the sauna has been part of daily life for thousands of years and through every season, not just the cold ones. The tradition runs so deep that in December 2020, UNESCO added Finnish sauna culture to its Representative List of the Intangible Cultural Heritage of Humanity. In a sauna, people cleanse their bodies and minds, embrace a sense of inner peace, and treat the practice as far more than simply warming up. There are about 3.2 million saunas in Finland, and almost 90% of the population uses one at least once a week, just as much in July as in January.

Finns don’t pack the sauna away when summer arrives. They pair it with a lake. That’s the model that many biohackers have adopted with their sauna and cold plunge therapy, but Finns have been doing it for centuries. (More on that history in our piece on heat therapy around the world.)

The Health Benefits of Using an Outdoor Sauna in Summer

Heat has different benefits in July than it does in January. A few reasons to keep the sauna running all summer:

Heat acclimation for athletes. If you train through the summer, regular sauna sessions help your body adapt to working in the heat. A 2015 study found that regular sauna-based heat acclimation led to increased plasma volume and enhanced heart rate variability, changes that promote greater cardiovascular stability during exercise, especially in hot environments. For runners, cyclists, and anyone racing in summer conditions, that’s a practical edge.

Recovery after training. Warm-weather workouts still leave you sore. The heat from a sauna relaxes muscles and supports circulation, which is why post-exercise sauna use has become a recovery staple for endurance athletes.

Cardiovascular support. Sauna benefits don’t pause for the season. In a long-running cohort of Finnish men, frequent sauna bathing was associated with fewer deaths from heart attacks, strokes, and other causes.

A reset for body and mind. Stepping into the heat at the end of a long, humid day does what it does in winter; it’s a routine that helps you slow down, loosen up, and sleep.

How to Time Sauna Use for Hot Weather

A few ways to make the summer heat work in your favor:

Go early or late. Morning and evening sessions catch the cooler air, so the contrast feels great and the walk back to the house is comfortable. A sauna at 7 a.m. is a fantastic way to start a summer day; one at dusk closes it out. Midday in August works too, just make sure you’re hydrated.

Keep sessions a touch shorter. When you’re already warm from a hot day, you don’t need as long inside to feel the effect. Step out when you’ve had enough rather than chasing the clock.

Use the shade and the breeze. An outdoor sauna sited under trees, or with a window that catches the evening air, gives you a built-in cool-down spot the moment you step out. Plan your setup so there’s somewhere pleasant to sit afterward.

Build it into your day. Post-gardening, post-run, post-lake, summer is full of natural active moments to slot a sauna recovery session in and make a good finish to an active day.

Hydrate, Then Cool Down

Summer sweat plus sauna sweat means you’ll want to drink plenty of water. Hydrate before you go in, keep water within reach, and replenish afterward. Save the alcohol for later; it works against you in the heat.

When it’s time to cool down, give your body a few minutes to settle instead of bolting straight indoors. Find some shade, catch a breeze, and let your heart rate come back down.

This is also where summer beats winter: the cold plunge pairing. Going from the sauna straight into cold water is the oldest move in the book, and it’s never more inviting than in July. The contrast is invigorating, and it’s how the Finns have always done it.

Why an Outdoor Sauna Is a True Four-Season Investment

Spring sessions, summer recovery, autumn wind-downs, winter soaks; the sauna earns its place in your backyard every month. A sauna is a wellness habit with a permanent address, and a well-designed backyard setup makes it easy to keep using. Our outdoor sauna lineup, including custom outdoor saunas, Finnleo, and Euro series, is all built for year-round Ontario living and pairs naturally with a cold plunge for the full summer ritual.

Explore Sundance’s full outdoor sauna collection online, or visit one of our six showrooms in St. Catharines, Hamilton, Burlington, Mississauga, and Vaughan to find the four-season sauna setup that fits your space.