The Best Northern Lights In Iceland 2020 References. How long should you stay in iceland to see the northern lights? Web the northern lights are one of the biggest draws to visiting iceland in the winter, between the months of september to april.

Because they can only be detected in the dark sky, there are certain months when you can’t observe the northern lights in iceland. Sightings are most likely in the evening hours from september to march. Web the northern lights are spectacular and iceland is the ideal place to search for this natural phenomenon.