Seal Sands (grid reference NZ529260) is a 294.37 hectare biological Site of Special Scientific Interest in County Durham, England, notified in 1966.

Situated in the mouth of the River Tees next to Greatham Creek and Seaton-on-Tees Channel, the site is accessible from the A178 road running between Seaton Carew and Port Clarence.

Members of the Northeast of England Process Industry Cluster (NEPIC) using the site include: Ineos, Fine Organics, Central Area Transmission System (BP Group), SABIC, Vertellus, ConocoPhillips, Vopak, Simon Storage, Intertek Caleb Brett, Harvest Operations.

Both Greenergy and Air Products abandoned their plans to each operate a plasma gasification waste-to-energy facility at Seal Sands.

This article about a Site of Special Scientific Interest in England is a stub.