Free things to do this weekend in and around Long Island

Long Island'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! - Long Island - New York, NY 10001 - Friday, September 18, 2026 to Sunday, September 20, 2026, See link for times

Seaside Crafts - The Whaling Museum & Education Center of Cold Spring Harbor - 301 Main Street, Cold Spring Harbor, NY 11724, United States - Friday, September 18, 2026 to Sunday, September 20, 2026, 11:00-4:00

Long Island History Hunt - Long Island, New York, USA - Friday, September 18, 2026 to Sunday, September 20, 2026, 12:00 am

Sunflower Festival at Harbes Farms Jamesport - Harbes Family Farm - Mattituck - 715 Sound Ave, Mattituck, NY 11952, United States - Saturday, September 19, 2026 to Sunday, September 20, 2026, 0:00 am - 6:00 pm

Parent Resource Fair / Feria de Recursos Para Padres - St. Joseph the Worker RC Church - 510 Narragansett Ave. , Bellport NY 11772. - Saturday, September 19, 2026, 9am -12pm

Revolutionary Revel at Raynum Hall Museum - 20 West Main Street, Oyster Bay, NY 11771, United States - Sunday, September 20, 2026, 11:00 am - 2:00 pm