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🍁 Sonoma County, CA • September 2026
Things to Do in Sonoma County in September 2026
Harvest season rolls in with outdoor concerts, plein air art, wine pours under the stars, and the irresistible pull of early fall in California wine country.
September in Sonoma County belongs to no other season. The summer crowds thin, the vineyards deepen from green to amber and crimson, and the events calendar fills with the kind of experiences that define wine country living: live music on the plaza, farm-to-table dinners at estate gardens, outdoor art shows, and harvest celebrations that draw from the county’s deep agricultural roots. Whether you’re a longtime local or planning a wine country escape, this September has more than enough reason to get out.
🍁 September 2026 Events Calendar
Sept
2
Acoustic Sunsets
Wind down the Labor Day weekend surrounded by the serene grounds of the Sonoma Botanical Garden. Evening acoustic performances pair with wine tasting for a genuinely restorative start to the fall events season. Event details.
Sept
3
First Thursdays Art Walk — Sonoma
Stroll from gallery to gallery and into storefront showcases across downtown Sonoma as local artists open their doors for the monthly First Thursdays Art Walk. A low-key, accessible way to engage with the region’s creative scene. Event details.
Sept
6
Sonoma Sundays on the Plaza — Mark St. Mary
Catch live Zydeco and blues from Mark St. Mary on the historic Sonoma Plaza. The weekly Sunday series brings some of the region’s most spirited performers to one of California’s most beautiful public squares. Event details.
Sept
6
Tomales Festival
The historic village of Tomales comes alive with the annual Tomales Festival, a community tradition rooted in the character of West County. This year’s lineup features live music from the Blues Defenders, bringing soulful sounds to a landmark local gathering. Event details.
Sept
8
Jazz Mafia Reimagined — Stevie Wonder Tribute
Jazz Mafia brings their reimagined, orchestra-style arrangements to an all-free outdoor concert dedicated to the music of Stevie Wonder. Set on the Sonoma Plaza on a warm September evening, this one is as good as it sounds. Event details.
Sept
12
Joose at Cooperage Brewing
Cooperage Brewing Company hosts an all-day R&B event headlined by Joose. Craft beer, good company, and soulful sounds make for one of the more enjoyable combinations September has to offer in Sonoma County.
Sept
12
Farm-to-Table Dinner Series
Kendall-Jackson’s celebrated dinner series returns with a seasonal menu built around the estate’s own gardens, paired with wines that speak directly to the harvest happening around you. One of the most sought-after tables in the county. Event details & reservations.
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19
Sept
Intro to Stained Glass Workshop
Art Escape’s hands-on stained glass workshop runs through September 19, giving you a real creative skill to take home. No experience required — this is a gentle entry point into a beautiful and tactile art form. Event details & registration.
Sept
19
Sonoma Plein Air Art Show & Sale
Regional landscape artists display and sell original works painted en plein air — on location, in the open air — around Sonoma County. Proceeds benefit student art programs, making this one of the more meaningful ways to bring a piece of Sonoma home. Event details.
Sept
19
Fork’n Good Food Festival
The Fork’n Good Food Festival returns for its fourth year with 50-plus regional culinary vendors showcasing the best of Sonoma County’s food scene. If you are eating your way through September, this is the marquee stop. Event details.
Sept
25
Candlelight Concert: Coldplay & Imagine Dragons Tribute
The acclaimed Candlelight Concert series transforms the songs of Coldplay and Imagine Dragons into sweeping classical string arrangements, performed by candlelight inside the historic Sebastiani Theatre. A rare format that makes familiar music feel entirely new. Tickets & details.
Sept
26
Grand Tasting at the Vintage Festival
One of the crown jewels of Sonoma’s fall calendar: the Grand Tasting at the Vintage Festival takes place under the stars on the grounds of the historic Sonoma Barracks. Exceptional wines, a storied setting, and the full weight of harvest season all in one evening. Tickets & details.
Sept
27
Alpha Rhythm Kings — Sonoma Sundays on the Plaza
Close out September the right way: Robert Dehlinger’s Alpha Rhythm Kings bring swinging big-band sounds to the Sonoma Plaza for the final Sunday concert of the month. Bring a chair, bring a friend, and let the music do the rest. Event details.
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ⓘ Events Disclaimer
Not all events taking place in Sonoma County are listed here. Event details, dates, times, and locations are subject to change — please confirm directly with event organizers before attending. To submit a local event for consideration, visit tiv360.com/contact-the-inventors-velocity. Sonoma County Business List has no affiliation with any event organizers listed on this page.
