Cold Plunge & Sauna in Seattle: How to Choose a Bathhouse or Studio
How to choose between Seattle's bathhouse, recovery studios, private sauna spaces, and waterfront saunas, with what to confirm about the cold option, staffing, seasonal sites, and booking.
By PlungeSpots editorial · How we research · Updated
Seattle's options include several saunas set up on beaches or moored on a lake, alongside a bathhouse, recovery studios, and private rental spaces. The cold option varies more here than in most cities: plunge tubs at some venues, showers at others, and open water at the beach saunas.
This guide groups the Seattle venues in our directory by format and lists what to confirm before booking. It is not a ranking. We checked each venue's details against its own website on 9 October 2026; terms change, so confirm them with the operator.
Choose by format
| Format | What you get | Best to confirm | Venues |
|---|---|---|---|
| Bathhouse | A heat room, steam, hot and salt water pools, and a cold plunge pool | Reservation, entry length | Banya 5 |
| Recovery studio | Infrared sauna and cold plunge alongside red light, float, or compression | Which services a booking includes, private or communal, membership terms | Space B.A.R., City Sweats (Wallingford), FLOAT Seattle (Greenwood) |
| Private sauna space | A sauna and cold option reserved for your group | Staffing, group size, cold plunge or cold shower | 815 Refresh, Hothouse Spa & Sauna |
| Waterfront sauna | A sauna on a beach or the water, with cold from open water or showers | Seasonal sites, open-water rules, weather | Bywater Sauna, Sauna Moon Seattle, Seattle Sauna |
Bathhouse
Banya 5 in South Lake Union is a hydrotherapy bathhouse with a parilka heat room, a 113°F eucalyptus steam room, a 103°F hot pool, an 87°F salt water pool, and a cold plunge pool. Two-hour entry is by reservation only, with value passes, memberships, and massage.
Recovery studios
Space B.A.R. in West Seattle has infrared and traditional saunas and breathwork-focused cold plunge and contrast sessions, in private suites or communal outdoor groups, plus massage and red light therapy. Walk-ins, packs, and memberships are offered; check whether the session you pick is private or communal.
City Sweats (Wallingford) offers infrared sauna, cold plunge, contrast therapy, red light therapy, and mechanical lymphatic drainage, and is part of a studio group with Bellevue and West Seattle locations. Monthly memberships and punch cards are offered.
FLOAT Seattle (Greenwood) has float tanks, infrared sauna, cryotherapy, and compression boots, plus 60-minute Fire & Ice private-suite sessions pairing infrared heat (up to 155°F) with a 45–50°F cold plunge. Single sessions, packs, and memberships are offered.
With multi-service studios, confirm exactly which services a booking or membership covers before you compare prices.
Private sauna spaces
815 Refresh near Green Lake and Roosevelt is a private outdoor sauna and cold plunge space, booked as self-paced 60-minute sessions for up to four people with no staff present. The sauna usually runs at 170–190°F and the plunge at 45–55°F. With no staff on site, read the operator's rules before your visit and do not plunge alone.
Hothouse Spa & Sauna on Capitol Hill is a gender-inclusive spa available by private rental only, with a tiled hot tub, cedar sauna, herbal steam room, and cold plunge shower. Groups reserve the whole space in 90-minute, two-hour, or three-hour blocks. The cold option is a cold plunge shower rather than a tub, so confirm it suits you.
Waterfront saunas
Bywater Sauna sets up a mobile barrel sauna by open water at Alki Beach and Golden Gardens, with seasonal sites at Leschi and Old Stove in Ballard, for self-paced 60- or 75-minute sessions. Spots are booked online and memberships are offered. Check which sites are running when you plan to go, ask whether staff are present during self-paced sessions, and read the operator's rules and conditions before going into open water.
Sauna Moon Seattle (Hot Rocks Sauna Club) sets up a mobile wood-fired cedar barrel sauna at Alki Beach Park, with cold dips in Puget Sound instead of a tub. Sessions of 30 or 60 minutes, memberships, and private rentals are offered. The cold option is open water, so check the operator's rules and conditions before your visit.
Seattle Sauna is a floating, double wood-fired cedar sauna moored dockside at Seattle Marina on Lake Union, with guided 90-minute social sessions. Cold exposure is via a bucket shower and an outdoor shower rather than a plunge. Shared sessions and private rentals are offered.
All three are outdoors, so check the weather and bring warm layers for afterwards. If you are not comfortable in open water, a venue with a plunge tub or cold showers may suit you better.
Booking and what to bring
Most Seattle venues here are booked online, with packs, punch cards, or memberships alongside single sessions; compare the total cost and the commitment using our membership or drop-in guide. For a first visit, our first-visit checklist covers the questions to ask, including supervision, and what to bring to a sauna, bathhouse or cold plunge covers packing and swimwear rules. Several studios here use infrared heat while the waterfront saunas are traditional or wood-fired; our traditional versus infrared guide explains the differences to ask about.
Cold water and heat are not suitable for everyone. If you have a health condition or any doubt, speak to a healthcare professional before booking.
How we compiled this guide
We list venues that offer sauna or cold plunge access to the public in Seattle and checked each one's facilities and booking model against its own website on 9 October 2026. We have not visited them, and inclusion is not an endorsement. Paid placements, if any, are labelled. Operators can suggest a correction. See our editorial policy.