Wilderness Landscape & Natural Heritage
Portland Harbour SSSI spans the sheltered waters and adjoining shores of Portland Harbour on the Isle of Portland, off the Dorset coast. This protected site includes extensive intertidal mudflats, saltmarshes, rocky shores, and open water habitats that support internationally important bird populations and a wide range of marine wildlife. Historically, Portland Harbour was developed as a major naval base and commercial port, but the surrounding habitats have remained ecologically significant, supporting species such as the nationally rare plants and wading birds. The SSSI designation protects its biodiversity, especially the overwintering and breeding grounds for species like oystercatchers, shelducks, and occasionally scarce waterfowl. Recreation opportunities include birdwatching, coastal walking, and educational visits focused on ecological science and geology. Key landmarks near the site include East Weares, an important area for coastal plants, and the historic harbour structures that reflect the area's maritime heritage. Portland Harbour offers visitors the chance to experience high-quality coastal environments and the rich biodiversity typical of southern England’s marine ecosystems.
