Breibukta is a bay at the southern side of Kongsøya in Kong Karls Land, Svalbard. It stretches from Kapp Altmann via Helgoland Island to Vestre Tømmerpynten at the headland Tømmerneset.
Coordinates: 78°50′39″N 28°42′18″E / 78.8441°N 28.7051°E / 78.8441; 28.7051