It’s a weekend in the desert, and the Joshua Tree Mobile Sauna is parked in the dirt at Más o Menos looking, at first glance, like any ordinary trailer. Then the door opens. The wood inside seems to glow. A plume of heat spills out, followed by people emerging flushed, damp, and smiling like they’ve stumbled onto a well-kept secret. Without much hesitation, a few of them drift straight toward a waiting tub of ice water, lower themselves in with dramatic resolve, then resurface laughing or gasping or briefly speechless. The scene feels loosely ceremonial — sun, heat, cold, repeat — where discomfort is the whole point.
This is Southern California’s sauna renaissance, and it’s happening everywhere all at once: Costa Mesa, South Ponto Beach, West Hollywood, Indian Wells.
Once confined to Nordic winters and elite locker rooms, the sauna has slipped into everyday life. It’s no longer a rare indulgence but an attainable wellness tool, reshaping how people slow down, recover, and connect with one another.
Now you’ll find barrel saunas and outdoor wood-fired saunas, architectural saunas that resemble modernist shrines, and increasingly, mobile saunas like the one parked in the desert: heat on wheels, ready to bring the ritual of sweat wherever it’s needed.
As Daniel Lee, co-founder of Joshua Tree Mobile Sauna, puts it, “A lot of people are familiar with sauna through gyms or studios, but the idea of being able to do it outside — camping, on vacation, near a national park — it’s like combining the best of two worlds.”
What is a sauna anyway?
At its most basic, a sauna is just a small room designed to get very hot on purpose. Traditional Finnish saunas clock in between 150 and 195 degrees Fahrenheit, with low humidity that keeps the heat sharp rather than suffocating.
The dryness is key. Sweat evaporates quickly, allowing the body to tolerate temperatures that would otherwise feel hostile. (Steam rooms — often confused with saunas — run cooler but saturate the air with moisture, creating a heavier, more clammy environment.)
There are also infrared saunas that operate at lower temperatures — typically 120 to 140 degrees. These use light rather than ambient heat, offering a gentler experience that still promises deep, cellular benefits.
The physiological effects of sauna use are well-documented. Heat stress increases heart rate and circulation in ways that mimic moderate exercise, gently pushing the cardiovascular system without the impact. Blood vessels dilate. Muscles relax. Sweating helps the body shed certain toxins, while inflammation markers may decrease. Endorphins flood the system, creating a calm, floaty afterglow that fans describe as meditative. Many people report sleeping more deeply, feeling less anxious, and experiencing increased mental clarity.
Introducing cold takes the experience up a notch. That’s why sauna is often paired with a contrasting therapy, like ice baths or cold showers. The shock flips the nervous system on, eases soreness, and delivers a jolt of alertness that could rival any espresso.
Yet despite all the talk of extremes, sauna isn’t about pushing limits.
“For most people, it’s not about being extreme or hardcore,” Lee says. “There’s just something there that most people can enjoy, since there are so many variations of it.”
Why now?
In Southern California, a region already rich with wellness rituals — yoga studios on nearly every corner, juice cleanses, smoothies that cost about the same as a small sedan — why has everyone suddenly decided that sweating aggressively is the ultimate solution?
Though sauna is experiencing a surge in popularity now, Lee Braun, founder and CEO of Perspire Sauna Studio, likes to remind people that this is anything but new.
“People thought what we were doing was a fad,” he says, recalling the early days of Perspire’s first infrared sauna in Costa Mesa in 2010. He laughs at the memory. Humans have been using heat therapy since caves in Africa and in Mesopotamia. The idea that it’s new is kind of funny.”
What is new is how sauna fits into modern life. Braun describes his approach as “an ancient practice with modern convenience” — accessible and designed to be seamlessly integrated into one’s lifestyle for greater well-being. “You feel better after one session, but the real impact comes from building habits,” he says.
In a wellness culture often dominated by hustle and optimization, Braun sees sauna filling a different role. “You’ve got nutrition, you’ve got fitness and movement,” he explains, “and the third leg of the stool is recovery. How do you recover well? How do you relax well?”
Sauna, he argues, succeeds not just because the science supports it, but because it addresses something people can feel immediately: relief.
“There’s not much medicine out there that’s good for you and actually feels good while you’re doing it,” Braun says.
Get hot with a friend
As sauna has migrated out of the purely functional and into everyday life, something else has happened. It’s become social.
Daniel Lee sees it as a rare kind of third space. “You can come together, have fun, and connect without it being a bar,” he says. The heat does the loosening, and conversation and community organically follow.
“I always compare it to camping,” Lee says. “When people are hanging out around a campfire, swapping stories. That’s what it feels like.”
It’s no surprise, then, that sauna culture in Southern California has organized itself around community. Enter the plunge club: spaces pairing high-heat saunas with cold plunge tubs, designed not just for recovery, but for shared experience, whether through memberships, day passes, or drop-in sessions.
West Hollywood’s Remedy Place, for instance, has positioned itself as an elevated social wellness clubhouse. Infrared saunas and cold plunges anchor the experience, alongside communal programming like breathwork ice baths, group fitness, and IV therapy with film screenings. It’s self-care that can be done together.
Further south, San Diego boasts a wide-ranging sweat scene. Yu Spa, tucked into the Convoy District, offers a full Korean jjimjilbang immersion with hot pools, cold pools, clay rooms, salt rooms, and very thorough scrubs. Over in North Park, RESET offers a big communal sauna and easygoing camaraderie. “The social aspect of our communal sauna allows you to connect with others in a peaceful, meditative setting, adding a layer of community to your wellness journey,” their website proclaims.
And then there’s Beach Sauna Express, which is exactly what it sounds like: a mobile sauna rolling up to the coast with regular events in San Clemente and Encinitas, letting you sweat out toxins before stepping back into the briny sea air, refreshed.
Beyond Los Angeles and San Diego, smaller California cities are shaping their own versions of the sauna ritual. In downtown Santa Barbara, Soul Care Studio + Sauna sessions are designed for slowing down together. Guests can layer their dose of heat with halotherapy, cold plunges, or guided meditation. Out in Indian Wells, Desert Cold Plunge & Wellness Studio features a range of revitalizing wellness experiences, including contrast therapy that pairs cold plunge with infrared sauna.
Boost your well-being
Back at Más o Menos, as the desert light sharpens in the afternoon, the Joshua Tree Mobile Sauna keeps going. People cycle in and out, wrapped in towels, clutching cups of cold brew, wearing that unmistakable expression of someone who has willingly endured something difficult and survived. There’s laughter. There’s silence. There’s the sense — hard to define but easy to feel — that this is more than a trend.
Southern California has always been obsessed with optimization, with longevity, with having a high quality of life. The sauna fits neatly into that context. It’s both ancient and modern, challenging and restorative, communal and deeply personal — no matter if it’s parked in the high desert, perched near the ocean, or tucked inside a polished downtown studio.
“There are just so many great outlets to make heat therapy part of your life,” Braun says.