The best time to visit Sunwapta Falls is generally from late spring to early autumn, specifically from May to October, when the Icefields Parkway is fully open and accessible.During late spring and early summer (May to July), you'll witness the falls at their most powerful, fed by melting glaciers and snow. This is when the water flow is at its peak, creating particularly impressive cascades. The surrounding vegetation is also lush and green, making for beautiful scenic views.For those who prefer slightly warmer weather and fewer crowds, late summer into early autumn (August to October) is an excellent choice. The water levels are still substantial, though perhaps not as thunderous as in early summer, and the changing autumn colours in the surrounding forests add another layer of beauty to the landscape.