The Ministry of Foreign Affairs (UD) advises against all international travel that is not strictly necessary. This global travel advice from UD is valid until March 1st, 2021. Read more about the global travel advice here (regjeringen.no).
At present, the opportunity for foreigners to enter Norway is very limited.
The travel advice and rules for entry are intended to reduce the risk of those travelling to bring the infection with them to Norway. Prior to travelling you should familiarize yourself with the rules that apply, both for the area where you live and for the area that you want to travel to. Keep in mind that the infection situation and the advice for infection control may change rapidly.