Herføl Marina was established in 1979 on Herføl, an island in Hvaler municipality near the border to Sweden. Herføl Marina currently operates three branches, two in Hvaler and one in Fredrikstad, and is thus one of the largest marinas in the Fredrikstad District. They perform repairs, circulation and service of all types of boats and engines, with emphasis on outboard engines and boats.
They have space for boats up to 40 feet, indoors and outdoors.