Onsen · Finnish★ 4.4(297 reviews)

Onsen

About this Sanctuary

Nestled in the heart of San Francisco's Tenderloin district, Onsen offers a serene retreat from urban chaos. Upon entering, guests are greeted with an ambiance reminiscent of traditional Japanese bathhouses. The venue features a warm soaking tub, a dry sauna, and a steam room, each adorned with modern amenities like heated floors and bidets for added comfort. Outside the main bathing area lies a private restaurant offering creative izakaya-style dishes, making it ideal for those seeking both relaxation and sustenance. While some find the space cozy and intimate, others note it can become crowded during peak hours, detracting from the tranquil atmosphere.

Heat

Onsen · Finnish

Listed temperature: 104 degrees

Crowd: Social, Depending on the day of the week (more vibrant on weekends)

When to go

Quieter Tuesday around 8 pm.

Busier Sunday around 8 pm.

Listed hours: 2-10 pm

What guests mention

Patterns summarized from public reviews. This is not a visit by My Local Sauna.

What Guests Love

Cozy and traditional Japanese bathhouse atmosphere
Modern amenities like heated floors in sauna and steam room
Beautiful natural light and greenery enhancing the relaxation experience
Friendly owner Nicolas who is attentive to guests' needs
Creative izakaya-style menu with unique small plates

Good to Know

Small changing area that can feel crowded
Limited space for locker room activities, making it easy to slip on wet floors
Noise from other guests can disrupt quiet time, especially during peak hours
Lack of water fountain in the facility
Restaurant is separate and requires additional reservation

Insights generated by AI from verified guest reviews

Before you book

What kind of sauna is Onsen?

Onsen is listed as Onsen · Finnish in San Francisco, California.

What are the hours at Onsen?

The listed hours are 2-10 pm. That is the range we have, not a day-by-day schedule.

When is Onsen less crowded?

From hourly popularity, the quieter window is Tuesday around 8 pm. The busier window is Sunday around 8 pm.

Does Onsen have a cold plunge?

The listing mentions a cold plunge, ice bath, or cold pool. Confirm it is open when you book or call.

Summarized from public listings and reviews by My Local Sauna, a directory of Clouds & Cactus LLC. A wrong hour or a missing plunge can be sent to contact@mylocalsauna.com.