Unable to answer "What are the opening hours here?" – Byggðasafn Vestfjarða (Museum) – https://osm.org/node/439214156 via StreetComplete 57.4:

May 16 - August 31: every day (incl holiday) 10:00-17:00

Sep 1 - 15: every day (incl holiday) 11:00-15:00

fee: adults: 1600 ISK, elderly: 1200 ISK, children free

Currently the information center from the other side is temporarily here for construction