The best time to visit Iceland depends entirely on the kind of experience you are seeking. June to August is the peak summer season, offering mild temperatures, nearly 24 hours of daylight during the Midnight Sun, and ideal conditions for exploring Iceland's dramatic landscapes, waterfalls, and hiking trails. September to March is the best time to witness the Northern Lights, one of the most spectacular natural phenomena in the world. Iceland's famous Golden Circle route, which includes the Geysir geothermal area, Gullfoss waterfall, and Þingvellir National Park, can be visited year-round.