Gunfleet Sands Offshore Wind Farm is a 172 MW wind farm about 7 kilometres (4.3 mi) off the Clacton-on-Sea coast in the Northern Thames Estuary.

The 108 MW Gunfleet Sands 1 wind farm gained planning consent in 2003/4; in 2006 DONG Energy (now Ørsted) acquired the project and submitted an application for a second 64 MW windfarm Gunfleet Sands 2 adjacent to the first, which received consent in 2008. Construction of both mounting Siemens Wind Power SWT-3.6-107 turbines took place between 2008 and 2010.

In 2010 planning began on a demonstration project Gunfleet Sands 3, used to test Siemens' 6 MW wind turbine model; two such turbines were installed in 2013.