Annual Mean Wind Speed Map
DECC wind speed data
The data used to generate this and other maps are provided free of charge and is not warranted as suitable for any particular purpose or use. The User shall assume full responsibility for his use of the data.
This information is based on historical measurement; guidance on how these data should be used should therefore be sought.
There are two sets of data files. One covers Great Britain and the other covers Northern Ireland. Each set comprises three files containing wind speed data at one of three heights above ground level.
These files are:
Speed10.asc 10 metres above ground level
Speed25.asc 25 metres above ground level
Speed45.asc 45 metres above ground level
Speed10i.asc 10 metres above ground level
Speed25i.asc 25 metres above ground level
Speed45i.asc 45 metres above ground level
These data are now also available as ESRI Shapefiles: