The reserve is one of the few places in the UK where grey and common seals can be observed resting together in the same location.
The mudflats at the mouth of the River Tees are part of the Teesmouth and Cleveland Coast Special Protection Area.
The reserve includes the Seaton Snook sand dune system, which is a rare geological feature for the region.
It is a key monitoring site for the North East's migratory bird populations, including knot, redshank, and curlew.
The landscape is intentionally managed to balance heavy industrial maritime activity with fragile wetland preservation.
Teesmouth National Nature Reserve is a 350-hectare site situated at the mouth of the River Tees, characterized by sand dunes, saltmarshes, and mudflats. It represents a significant industrial-adjacent ecosystem where rare wildlife thrives amidst active port activity. The reserve is home to a internationally important population of common and grey seals, which haul out on the sandbanks. It is a critical stopover for migratory wading birds and wildfowl, particularly during winter months. The habitat mosaic includes the Greatham Creek area, which is accessible via a long-distance trail network. The site remains a vital coastal defense and environmental buffer for the surrounding industrial infrastructure.
The Greatham Creek seal viewing platform.
Bring binoculars for seal watching, as they often rest on sandbars at a significant distance from the walking paths.
Check the tide tables before visiting; wildlife viewing is significantly better at low tide when mudflats are exposed.
Stick to marked footpaths to avoid disturbing nesting birds in the fragile dune vegetation.
Do not attempt to walk on the saltmarshes or mudflats, as the terrain is soft and prone to trapping visitors.
Wear sturdy waterproof walking boots; keep dogs on a lead at all times to protect sensitive wildlife habitats.
