The Department of Energy and Climate Change (Decc) said that offshore wind generated 7.5TWh of electricity, an increase of 45.5%. Onshore wind also delivered more power, growing by 15% to deliver 11.9TWh.
Both figures were attributed to an increase of installed capacity, which rose by 2.4GW in 2012, split equally across onshore and offshore installations. Together they represent 57% of installed renewables capacity.
Average load factors across the year for both onshore and offshore wind fell — to 25.8% and 35.1% respectively — attributed to lower wind speeds, particularly in the last quarter.
The offshore wind sector saw an increase in installations of 63% last year. The UK boasts the world's largest offshore wind fleet, with 2012 installed capacity just under 3GW, up from 1.8GW a year earlier.
Onshore installed capacity rose by 1.2GW to 8.3GW across the UK, an increase of almost 16.9%.
Total renewables generation increased by 2% last year to 11.3%, with wind's share of generation rising by 31.5%. Reductions were seen in generation of gas and nuclear.
Data released today is part of a regular energy trends statistical series issued by Decc.