Battery Park City just published its fall programming, and every single event on it is free. The centerpiece is Illumination NYC, the outdoor light-art festival that takes over the recently reopened Wagner Park from Sept. 17 through 19 for its fifth year — more than 10 large-scale installations by New York and international artists, projection mapping across the park’s architecture, live performances and DJ sets under the skyline.

  • Illumination NYC — Thu Sept 17 to Sat Sept 19, Wagner Park. Nightly 7–11 p.m. Free. More than 10 installations, projection mapping, live performances, DJ sets.
  • Silent disco — Saturday night only, Quiet Events with three DJs and wireless headphones. Free; wear neon or glow accessories if you want to blend in with the art.
  • Food and drink — Food trucks on site plus a kiosk selling beer and wine. The only part of the festival that costs money.
  • Climate Week — Sept 20–26. Beginner-friendly fishing, urban beekeeping, forest-bathing meditation in Teardrop Park, and a panel plus walking tour on how Lower Manhattan is preparing for rising seas and coastal storms.
  • Fall concerts — Son Rompe Pera (Mexican cumbia and marimba), Sept 24. Broadway’s Betsy Wolfe in concert, Sept 28. Pat Oleszko’s We Are the Resist-Ants: Anthem, an “absurdist picnic spectacle,” Oct 3–4.
  • October — Día de los Muertos celebration, sunset jazz from the Tribeca Jazz Institute, catch-and-release fishing in the Hudson, a Brooklyn Contra barn dance, and campfire stories plus Halloween crafts at Teardrop Park on Oct 24.
  • Holiday Lights Celebration — Dec 3, Rockefeller Park. Tree lighting, carols, treats. Free.

The light festival is the one to catch this week: it’s three nights, it’s free, and Wagner Park only reopened recently, so most of the crowd will be seeing the new waterfront for the first time. After that, the Climate Week programming is the more interesting stretch — the coastal resilience walking tour is the rare city event that deals with sea-level rise on the actual block where it will happen.

Practical version: go Thursday or Friday night to avoid Saturday’s silent-disco crush, bring cash or a card for food since nothing else on the calendar costs anything, and keep the Dec 3 tree lighting somewhere you’ll see it again in November.

Four months, one neighborhood, no tickets. Battery Park City’s waterfront is quietly the most wallet-friendly fall calendar in the city.