Arfordir Abereiddi is a Site of Special Scientific Interest (SSSI) in Pembrokeshire, South Wales. It has been designated as a Site of Special Scientific Interest since January 2002 in an attempt to protect its fragile biological and geological elements. The site has an area of 63.74 hectares and is managed by Natural Resources Wales.

This SSSI has been notified as being of both geological and biological importance. The following features have been noted as Special Scientific Interest:

1. Littoral Rock (Reef)
2. Sea caves
3. Saline Lagoon
4. Grey seal (Halichoerus grypus)
5. Arenig – Llanvirn GCR block
6. Ordovician Igneous GCR block

• List of Sites of Special Scientific Interest in Pembrokeshire
• Abereiddy

• Natural Resources Wales website