The company said that stronger than average winds during the period helped push up the yield, but the efficiency of turbines and operations and maintenance contributed.
Head of global operations at Dong, Michael Simmelsgaard, said that the results "can most certainly be credited to a rock-solid performance from the teams working day in and day out servicing our fleet of turbines.
"Keeping high availability and high production require full attention on every part and component of the turbines ensuring that they are spinning as never before."
Things have not proved so fortuitous for other offshore wind farm operators, with generation from the 60MW Alpha Ventus offshore wind farm falling in 2013. The project, with Areva 5MW and Repower 5MW machines, had an average capacity factor of 42.7%, a 12% decrease on the previous three years.
It should be noted however, that this capacity factor is for the whole of last year, and so covers the less-windy summer months as well.
Dong operates offshore wind farms in the UK and Denmark; it is developing projects in France, Germany and the Netherlands.