Winterton-Horsey Dunes is a 427-hectare (1,060-acre) biological and geological Site of Special Scientific Interest north of Great Yarmouth in Norfolk, England.

[4] Winterton Dunes is a National Nature Reserve[5] Winterton Ness is a Geological Conservation Review site.

[6] The whole site is in the Norfolk Coast Area of Outstanding Natural Beauty.

[7] This site has extensive dunes together with areas of grazing marsh and birch woodland.

The site is geologically important as it displays the processes which control dynamic dune development.