A common misconception is that Niagara Falls "closes" for the winter, but the natural wonder itself is always open and free to view 24/7, 365 days a year. However, the famous attractions surrounding the falls have specific seasonal operating months. The boat tours, such as the Maid of the Mist (USA) and City Cruises (Canada), typically operate from April or May through November, closing once ice begins to form on the river. Similarly, the Cave of the Winds and Journey Behind the Falls may have restricted access during the coldest months. In 2026, visiting in the "off-season" (December to March) offers a unique experience where the mist freezes onto the trees and railings, creating a stunning "ice palace" effect. While you won't be able to take a boat in January, the nightly illumination and the Winter Festival of Lights ensure there is plenty to see during the months when the water volume is slightly reduced for hydroelectric power but the scenery is at its most crystalline.