Just a follow up comment. As noted above, we sailed in February (6-18) on the Viking Sky. We had no problems with the weather or the cold. We were prepared with boots, snow pants, parkas, long underwear, hats & gloves. We were never really cold, even at the Arctic Circle. The cruise after ours is the one that ran into the storm and lost power. However, we would not hesitate to travel to Norway again, even in the winter. If you want any chance of seeing the northern lights, that's when you need to travel. Have fun!