September is Sonoma Valley at its most alive. The vineyards shift from deep green to gold, harvest crews work the rows at dawn, and the historic Plaza becomes a stage for free concerts, outdoor art shows, and one of California's oldest wine celebrations. From indie rock at the wineries to zydeco under the oaks, here is everything worth putting on your calendar this September.
September 2026 Events in Sonoma
The former Pavement frontman brings an afternoon of indie rock to one of Sonoma's most beloved historic estates. Gun Bun's outdoor setting makes this one of the more atmospheric winery concerts of the year.
The Sonoma Sundays series kicks off September with a free afternoon of Louisiana blues and zydeco. Sascha Jacobsen and Mark St. Mary bring the bayou to the Bay Area's most beautiful town square.
The Sonoma Valley Jazz Society hosts Jazz Mafia for a free outdoor community concert on the square. Expect inventive, orchestral reimaginings of the Stevie Wonder catalog in a uniquely Sonoma setting.
A casual, high-energy evening performance by The Rocky Wheels on Anaba's outdoor stage. Grab a glass of cool-climate Sonoma Coast wine and settle in as the sun drops behind the hills.
Acclaimed American comedian Nick Thune takes the stage of the historic Sebastiani Theatre for a live performance. Known for his dry wit and storytelling, Thune is one of the sharper comedic voices working today.
A poolside afternoon concert featuring a Tom Petty tribute band at Sonocaia Estate. This is the kind of unhurried wine country afternoon September was made for.
Singer-songwriter TJ Carter brings an intimate evening of jazz-influenced folk to HopMonk's cozy Sonoma stage. An ideal midweek wind-down for anyone who prefers their music up close.
A free outdoor screening of the 1985 classic on the Sonoma Plaza, complete with complimentary popcorn. Bring a blanket, grab a spot on the grass, and let Marty McFly do the rest.
Nationally recognized painters display and sell fresh outdoor paintings created on-location across the Sonoma Valley. All proceeds benefit K–12 art grants in the community. See the full artist schedule at the Sonoma Plein Air Foundation.
Valley of the Moon Vintage Festival Weekend
September 24–27, 2026 — California's oldest wine festival returns to historic Sonoma for its 129th year.
Sonoma's oldest autumn celebration honoring wine-making traditions returns for its 129th year. The full festival weekend features historical pageantry, live entertainment, a grape stomp, and the traditions that have defined this square since 1897. Plan your weekend at valleyofthemoonvintagefestival.org.
Part of the Vintage Festival weekend, the Grand Tasting brings together more than 40 regional wine producers for an outdoor evening under the stars at the historic Sonoma Barracks. One of the best single-session wine experiences in the county all year.
Close out September with Robert Dehlinger's Alpha Rhythm Kings delivering a lively, vintage California jump-blues performance on the Plaza. A perfect Sunday send-off to a month that had it all.
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