|Site of Special Scientific Interest|
|Area of Search||West Sussex|
|Area||615.9 ha (1,522 acres)|
|Designated:||30 March 1988|
|Natural England website|
Geographically it is the smallest and most easterly of the harbours of the Solent.
It is a biological Site of Special Scientific Interest, a Local Nature Reserve, a Special Protection Area, and a Ramsar site. Its shingle spit is further designated a Geological Conservation Review site. In spring or autumn rare migratory birds can often be seen. Pagham Harbour Local Nature Reserve covers 1,450 acres (6 km2) of salt marsh, mudflats, farmland, copses, lagoons, reed beds and shingle beaches.
Rare bird species
- Little Tern Sternula albifrons during the breeding season
- Ruff Philomachus pugnax over-wintering
- Pintail Anas acuta migratory