While Singapore Changi Airport is a world-renowned 24-hour hub, not every single shop and facility is open 24/7 in 2026. Major amenities like the Transit Hotels, baggage storage, 24-hour food courts, and select duty-free shops (like Shilla Duty Free) do operate around the clock. However, many boutique retail stores, specialty restaurants, and the "Jewel" attractions (like the Canopy Park) typically close between 10:00 PM and 10:00 AM. The famous Rain Vortex waterfall also stops flowing at night (usually around 10:00 PM or 11:00 PM). If you have a late-night layover, you will still find plenty of comfortable rest areas, movie theaters, and basic amenities open, but for a full shopping or dining experience, you should plan for a daytime or evening transit. Always check the live "Changi App" for the current 2026 operating status of specific high-end lounges or luxury brand boutiques before you land.