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The Best Time To See The Northern Lights In Iceland. Guaranteed darkness is the first important factor. The best season to see the northern lights in Iceland is from September to mid-April â these are the months where there are full dark nights.
When To See Them. Unfortunately, the best time to witness the Northern Lights is in the dead of winter, from 11:30 p.m. to 3:30 a.m., with peaks around 1:30 or 2:30 a.m. However, some say you can catch a brief glimpse of the Northern Lights 240 nights a year, especially during March, September and October. Your best hope is for a clear, cloudless night. Other ideal times include the equinoxes around September 22 and March 22.