A Healing Sanctuary
in Sonoma County's Coastal Hills

our dedicated staff has created a healing environment with attention to detail
and aesthetics

Osmosis is the only day spa in the U.S. that offers the Cedar Enzyme Bath, a rejuvenating heat treatment from Japan. Inspired by a vision of healing, beauty, and inner peace, Osmosis was founded in Sonoma County in 1985. Since that time, many hands have worked together with an abundance of heart to manifest one of the most unique and relaxing spas in the country.

Our Location

Located on five secluded acres in a scenic valley 1.5 hours north of San Francisco, Osmosis is a Japanese-style retreat with beautiful bonsai and bamboo gardens. Close to Northern California's breathtaking Sonoma Coast, wine country and redwoods, Osmosis is situated in a great destination spot with superb lodging nearby and many activities to choose from.

Our Dedicated Staff

The Osmosis staff has worked hard to create a healing environment with attention to detail and aesthetics. A talented coterie of massage therapists has crafted their art into a style that combines wonderfully with the Cedar Enzyme Bath. The cornerstone is shared vision and meaningful work. Click here to read our company profile.

A Tour of Osmosis Day Spa Sanctuary

See all of the amazing offerings at Osmosis.

Osmosis Day Spa Sanctuary from Osmosis Day Spa Sanctuary on Vimeo.

Celebrate our 30th Anniversary with us!
Wednesday May 20, 5-9pm

Oysters, Wine, Kombucha on tap, Live Music, Chair Massage, Footbaths and more!

Give the Gift of Osmosis

Print gift cards instantly online, or have your perfect gift sent via mail.
  Click or call (707) 823-8231

Osmosis Voted #1 Again!
Best of Boho Logo
Winner Best Day Spa
17 Years Running!

Upcoming Events at Osmosis

We have many exciting events this Spring; Garden Tours, Meditation Retreats, Local's Night Celebrations and more!


Check-Out our Blog

Fantastic Getaway Specials

Enjoy the relaxing combination of spa treatments at Osmosis Day Spa paired with an overnight stay
in deluxe nearby accommodations.
Packages starting at $359!!!

Osmosis is a Green Spa

As a founding member of the Green Spa Network, we are leading the way in bringing sustainable practices to the spa industry. Greening Osmosis is an ongoing process, and we are commited! Learn More