Does Onsen SF have a cold plunge?

Yes. Onsen SF lists a cold plunge among the facilities on its own published pages, checked Aug 16, 2026. It does not publish a water temperature, so we do not list one — check with the studio if the exact temperature matters to you.

How much does Onsen SF cost?

Onsen SF publishes a drop-in rate of $50, read from its own pages on Aug 16, 2026. Prices change without notice — the studio's own booking page is the live figure.

Is Onsen SF private or shared?

Communal. Shared sauna and plunge areas used alongside other guests. Checked Aug 16, 2026.

What else does Onsen SF offer besides the cold plunge?

Its published facilities in San Francisco also include traditional sauna and steam room, checked Aug 16, 2026. Availability of individual services can vary by session type and time of day.

Onsen SF

466 Eddy St, San Francisco, CA94109

Details last checkedAug 16, 2026

Onsen SF is a Japanese sento-style communal bathhouse near San Francisco's Tenderloin, with a shared hot tub, a redwood sauna, a steam room, and an overhead cold plunge. A soak is $50 for a 2-hour reservation capped at four guests, with rotating single-gender and co-ed bathing days through the week. Children under 18 are not permitted in the bathing area, and cancellations or no-shows inside 24 hours are non-refundable.

Its $50 drop-in sits above the San Francisco median of $45, across the 5 studios here that publish one. It does not publish a plunge temperature (2 of the 23 San Francisco studios we track do) — worth asking when you book. Communal access puts it with 5 of the 23 studios we track here; the rest run a different model.

Details

Access: Communal; Shared sauna and plunge areas used alongside other guests.
Phone: +1-415-441-4987

What they offer

Cold Plunge: A chilled immersion tub, typically held between 38°F and 55°F, used for short cold-exposure sessions.Cold Plunge in San Francisco →
Traditional Sauna: A dry, high-heat room warmed by an electric or wood-fired stove, usually running between 160°F and 200°F.Traditional Sauna in San Francisco →
Steam Room: A sealed room held near 100% humidity at roughly 110°F to 120°F.Steam Room in San Francisco →

Hot and cold in one visit: contrast therapy in San Francisco →

Pricing

Drop-in: $50

Location

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More recovery studios in San Francisco

Questions about Onsen SF

Does Onsen SF have a cold plunge?: Yes. Onsen SF lists a cold plunge among the facilities on its own published pages, checked Aug 16, 2026. It does not publish a water temperature, so we do not list one — check with the studio if the exact temperature matters to you.
How much does Onsen SF cost?: Onsen SF publishes a drop-in rate of $50, read from its own pages on Aug 16, 2026. Prices change without notice — the studio's own booking page is the live figure.
Is Onsen SF private or shared?: Communal. Shared sauna and plunge areas used alongside other guests. Checked Aug 16, 2026.
What else does Onsen SF offer besides the cold plunge?: Its published facilities in San Francisco also include traditional sauna and steam room, checked Aug 16, 2026. Availability of individual services can vary by session type and time of day.