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It is very, very likely. Pretty much anywhere past Rovaniemi and you are all good, as they are seen for something like 200 nights of the year - the other nights... the sun is still up ;D

I definitely think so . In north of Norway, Sweden and Finland you can see it because your within the north polar circle. Recently people have seen northern lights all the way down in south of Sweden because there is a lot of solar activity and will only increase till it reaches a peak in 2024. But there are three factors that are necessary to see it. It needs to be dark, so it's good during this time of the year, there has to be solar winds, and last but not least it has to be clear skies otherwise the view will be blocked.