The west fjords are really rich, by their nature and the amount of various animal species that they foster. In order to not miss any spectacular viewpoint and fully go around (except the trek of Hornstrandir which adds a few days by itself), you can count 3 days, at least.
Immediately after landing at the fjord, and because we had used the crossing to ask every passenger on board for a lift, we took off with an Italian couple. We headed to the beach of Rauðisandur, literally “the red sand beach”. This place is quite magical and forces you to cross a mountain peak before reaching it. The view is stunning and the beach dazzling, it’s definitely worth the detour.