The best time to go to Qeqertarsuaq is during the summer months, from June to August, for the mildest weather and longest daylight hours.
During this period, temperatures are at their highest, typically ranging from 5°C to 10°C, making outdoor activities more comfortable. You'll experience the midnight sun, with nearly 24 hours of daylight, which is superb for extended explorations and sightseeing. This is also when most tours and excursions, such as boat trips to see whales or icebergs, are fully operational.
For those interested in dog sledding and the Northern Lights, the winter months, from February to April, offer a great experience. While temperatures are much colder, often dropping below -10°C, the snow cover is ideal for winter sports, and the long nights provide excellent opportunities to witness the aurora borealis.