In order to assess whether your site is suitable for a wind turbine, you can check average wind speeds in your area.
For the UK, the following web sites can be used:
http://www.bwea.com/noabl/
http://www.bwea.com/images/misc/noabl_c.gif
For Northern Ireland, click on:
http://www.actionrenewables.org/site/Windmap.asp
For the Republic of Ireland, click on:
http://maps.sei.ie/wind/