Free things to do this weekend in and around San Francisco

San Francisco & Bay Area's Top Picks for FREE family-friendly fun Friday, September 18, 2026 to Sunday, September 20, 2026.

(Scroll down for full, detailed list of free weekend activities.)

Free Fall and Holiday Mini Photo Sessions with Shoott - Bay Area - Shoott - Broadway, New York, NY, USA, Friday, September 18, 2026; Saturday, September 19, 2026; Sunday, September 20, 2026 - See link for times

Toddler Plus Storytime - Main Library - Children's Department - Main Library - Children's Department, Friday, September 18, 2026 - 10:30am

2026 Autumn Moon Festival - 2023 SF Chinatown Autumn Moon Festival - 2023 SF Chinatown Autumn Moon Festival, San Francisco, CA, USA, Saturday, September 19, 2026 to Sunday, September 20, 2026 - 11:00 am - 5:00 pm PDT

Family Storytime - West End Library, Alameda Free Library - 788 Santa Clara Avenue, Alameda, CA 94501, United States, Saturday, September 19, 2026 - 10:30am

Family Storytime - Main Library - Children's Department - Main Library - Children's Department, Saturday, September 19, 2026 - 10:30am

Summer's End Music Festival - Half Moon Bay City Manager - 501 Main Street, City of Half Moon Bay, CA 94019, United States, Saturday, September 19, 2026 - 11:00 am - 5:00 pm

Family Storytime - Main Library - Main Library, Sunday, September 20, 2026 - 12:30pm

Sundays at the Asian Art Museum - Asian Art Museum - 200 Larkin St, San Francisco, CA 94102, United States, Sunday, September 20, 2026 - See website for details