Free things to do this weekend in and around San Diego

San Diego'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.)

• Black-Billed Cuckoo - La Jolla Playhouse - UC San Diego - Gilman Drive, La Jolla, CA, USA - September 18, 2026 & September 20, 2026 - Check website for time

• FREE fall and holiday mini photo sessions with Shoott! - San Diego - Shoott - Broadway, San Diego, CA, USA - September 18, 2026 to September 20, 2026 - See link for times

• Lego Time at the Pacific Beach Library - Earl & Birdie Taylor Park - Dawes Street, San Diego, CA, USA - September 18, 2026 - 4:00 - 5:00pm PST

• Prospective Family Open House-Magnolia Science Academy - Magnolia Science Academy - 6525 Estrella Ave, San Diego, CA 92120, USA - September 19, 2026 - 9:00 - 10:30am