In Australia, 10 of the curated saunas fit this cut. See the full Australia country guide for every venue, or keep scrolling for just the seaside saunas.
Every seaside sauna in Australia

Alchemy Sauna - City Beach
$City Beach, Australia
Alchemy's City Beach sauna sits on the beachfront at Challenger Parade, north of Perth. Communal sessions run for an hour, and the cool-off is an ocean dip rather than an ice bath. Public beach showers serve as the change facilities.

Alchemy Sauna - Scarborough
$$Scarborough, Australia
Alchemy's Scarborough sauna sits on a rooftop at Manning Street with panoramic views over Scarborough Beach and the Indian Ocean. One ten-seat sauna runs hour-long communal sessions, with cold showers at four degrees for the contrast between rounds.

Deep Blue Bath House and Day Spa
$$Warrnambool, Australia
Deep Blue is a geothermal hot-springs resort on the Warrnambool foreshore. Open-air rock pools, sensory caves, an indoor mineral bath house and a cold plunge are all open to the public, with no hotel stay needed. The sauna is a private infrared cabin in the day spa, booked on its own or ahead of a treatment.

Dunalley Bay Sauna
$$Murdunna, Australia
A six-seat cedar barrel sauna with a Harvia electric heater, set at a fixed spot on the Forestier Peninsula with calm water views over Dunalley Bay. It runs unstaffed and self-guided: you book online, let yourself in, and there is a change room on site. Shared public hours and whole-barrel bookings are both on the calendar.

Kuuma - Nature Sauna
$$$Barretta, Australia
Kuuma is a wood-fired sauna on a boat that leaves Margate Marina, twenty minutes south of Hobart. Ninety-minute cruises on the D'Entrecasteaux Channel take up to eight people, who share the heat and step off into the cold water between rounds. Sunrise and golden-hour departures run alongside three-hour private charters.

Phillip Island Sauna
$$Cowes, Australia
Phillip Island Sauna runs a wood-fired sauna for up to ten on the Cowes Jetty, with the sea a few steps away for a dip between rounds. Communal sessions are gently guided with towel work and essential oils, and the whole sauna can be booked privately. A second wood-fired sauna runs seasonally at Green Gully Brewing.

Sauna Boat Tasmania
$$$Kettering, Australia
An electric sauna built from Tasmanian timber, on a boat moored at Oyster Cove Marina in Kettering, south of Hobart. The boat stays tied up for the hour-long sessions, which take up to four people, shared or private. An enclosed plunge area lets you drop into the cold water of the cove between rounds.

Sauna to Sea
$$Prevelly, Australia
Sauna to Sea is a timber trailer sauna parked at the Rivermouth car park in Prevelly, a short walk from the surf at Margaret River. An attendant tends the heat while you cycle between the hot room and the ocean. Sessions are shared, or booked privately for groups of up to eight.

Tank Bathhouse & Day Spa
$$Mooloolaba, Australia
Tank Riviera is a waterfront bathhouse and day spa in Mooloolaba. It is built around a run of magnesium tank baths that step down in temperature to a cold plunge, with a sauna and steam room alongside. Bathing is sold bundled with dining and treatments, and the place doubles as a day club and events venue.

Those Floating Saunas
$$Shellharbour, Australia
A Nordic-inspired floating sauna moored at Shellharbour Marina in Shell Cove, NSW. It is billed as the first floating sauna on the South Coast. Ocean dips go straight off the pontoon.