Deben Estuary is a 981.1-hectare (2,424-acre) biological Site of Special Scientific Interest (SSSI) covering the River Deben and its banks 12 kilometres from its mouth north of Felixstowe to Woodbridge in Suffolk. It is a Ramsar internationally important wetland site and a Special Protection Area under the European Union Directive on the Conservation of Wild Birds. It is also in the Suffolk Coast and Heaths Area of Outstanding Natural Beauty. It partly overlaps two geological SSSIs, Ferry Cliff, Sutton and Ramsholt Cliff.
Blaxhall Common is a nature reserve in the parish of Blaxhall in the East Suffolk District of Suffolk. The reserve is owned by Blaxhall Parish Council and managed by Suffolk Wildlife Trust. It is designated a 45.9-hectare (113-acre) biological Site of Special Scientific Interest as Blaxhall Heath. It is part of the Sandlings Special Protection Area under the European Union Directive on the Conservation of Wild Birds, and of the Suffolk Coast and Heaths Area of Outstanding Natural Beauty. A Bronze Age bowl barrow is a Scheduled Monument.
Sizewell Marshes form a 260-acre biological Site of Special Scientific Interest adjacent to Sizewell in Suffolk. It is in the Suffolk Coast and Heaths Area of Outstanding Natural Beauty, and is part of a 356-acre (144-ha) nature reserve managed by the Suffolk Wildlife Trust as Sizewell Belts.
Sutton and Hollesley Heaths is a 483.3-hectare (1,194-acre) biological Site of Special Scientific Interest south-east of Woodbridge in Suffolk. Most of the site is managed by the Suffolk Wildlife Trust as Sutton and Hollesley Commons. It is part of the Sandlings Special Protection Area under the European Union Directive on the Conservation of Wild Birds, and the Suffolk Coast and Heaths Area of Outstanding Natural Beauty.
Minsmere–Walberswick Heaths and Marshes are a Special Area of Conservation and Site of Special Scientific Interest in the English county of Suffolk. The site is located on the North Sea coast between Southwold and Sizewell, extending over an area of coastline around 7 miles (11 km) in length. The site is also designated as a Special Protection Area, part of the Minsmere–Walberswick European Marine Site and contains areas designated as Ramsar sites and Natura 2000 sites. It lies within the Suffolk Coast and Heaths Area of Outstanding Natural Beauty and is made up of a "complex mosaic" of marshes, reed beds, shingle banks and lowland heath habitats.
Crag Farm Pit, Sudbourne is a 4.8-hectare (12-acre) geological Site of Special Scientific Interest east of Sudbourne in Suffolk. It is a Geological Conservation Review site, and within the Suffolk Coast and Heaths Area of Outstanding Natural Beauty.
Gedgrave Hall Pit is a 0.65-hectare (1.6-acre) geological Site of Special Scientific Interest in Gedgrave, south of Saxmundham in Suffolk. It is a Geological Conservation Review site, and it is in the Suffolk Coast and Heaths Area of Outstanding Natural Beauty.
Iken Wood is a 5.3-hectare (13-acre) biological Site of Special Scientific Interest south of Snape in Suffolk. It is in the Suffolk Coast and Heaths Area of Outstanding Natural Beauty.
Richmond Farm Pit, Gedgrave is a 0.57-hectare (1.4-acre) geological Site of Special Scientific Interest south-west of Orford in Suffolk. It is a Geological Conservation Review site, and is in the Suffolk Coast and Heaths Area of Outstanding Natural Beauty.
Valley Farm Pit, Sudbourne is a 0.5-hectare (1.2-acre) geological Site of Special Scientific Interest north of Orford in Suffolk. It is a Geological Conservation Review site, and in the Suffolk Coast and Heaths Area of Outstanding Natural Beauty.
Aldeburgh Brick Pit is a 0.9-hectare (2.2-acre) geological Site of Special Scientific Interest in Aldeburgh in Suffolk. It is a Geological Conservation Review site, and it is in the Suffolk Coast and Heaths Area of Outstanding Natural Beauty.
Aldeburgh Hall Pit is a one hectare geological Site of Special Scientific Interest in Aldeburgh in Suffolk. It is a Geological Conservation Review site, and it is in the Suffolk Coast and Heaths Area of Outstanding Natural Beauty.
Leiston - Aldeburgh is a 534.8-hectare (1,322-acre) biological Site of Special Scientific Interest which stretches from Aldeburgh to Leiston in Suffolk. Part of it is The Haven, Aldeburgh Local Nature Reserve, and another area is the North Warren RSPB nature reserve. There is also a prehistoric bowl barrow on Aldringham Common, which is a Scheduled Monument. The site is in the Sandlings Special Protection Area under the European Union Directive on the Conservation of Wild Birds, and the Suffolk Coast and Heaths Area of Outstanding Natural Beauty.
Orwell Estuary is a 1,335.7 hectare biological Site of Special Scientific Interest which stretches along the River Orwell and its banks between Felixstowe and Ipswich in Suffolk. It is part of the Stour and Orwell Estuaries Ramsar site internationally important wetland site and Special Protection Area under the European Union Directive on the Conservation of Wild Birds. It is also in the Suffolk Coast and Heaths Area of Outstanding Natural Beauty.
Pakefield to Easton Bavents is a 735.4-hectare (1,817-acre) biological and geological Site of Special Scientific Interest which stretches along the Suffolk coast between Lowestoft and Southwold. It includes three Geological Conservation Review sites, and part of the Benacre National Nature Reserve. An area of 326.7 hectares is the Benacre to Easton Bavents Lagoons Special Area of Conservation, and 470.6 hectares is the Benacre to Easton Bavents Special Protection Area under the European Union Directive on the Conservation of Wild Birds. The site is also partly in the Suffolk Coast and Heaths Area of Outstanding Natural Beauty.
Sandlings Forest is a 2,483.8 hectare biological Site of Special Scientific Interest in two large blocks, Rendlesham Forest and Tunstall Forest, and two small ones, between Woodbridge and Aldeburgh in Suffolk. It is partly in the Sandlings Special Protection Area under the European Union Directive on the Conservation of Wild Birds. It is in the Suffolk Coast and Heaths Area of Outstanding Natural Beauty.
Snape Warren is a 48 hectare biological Site of Special Scientific Interest east of Snape in Suffolk. It is part of the Sandlings Special Protection Area under the European Union Directive on the Conservation of Wild Birds, and in the Suffolk Coast and Heaths Area of Outstanding Natural Beauty.
Tunstall Common is a 36.6 hectares biological Site of Special Scientific Interest east of Tunstall in Suffolk. It is part of the Sandlings Special Protection Area under the European Union Directive on the Conservation of Wild Birds, and the Suffolk Coast and Heaths Area of Outstanding Natural Beauty.
Crag Pit, Sutton is a 0.7-hectare (1.7-acre) biological Site of Special Scientific Interest north of Shottisham in Suffolk. It is in the Suffolk Coast and Heaths Area of Outstanding Natural Beauty.
