Great Wood and Dodd's Grove is a 36.8-hectare (91-acre) biological Site of Special Scientific Interest in Leigh-on-Sea in Essex.

[3][4] Essex Wildlife Trust runs the Belfairs Woodland Centre and manages the site together with Southend-on-Sea City Council.

[5] This is a small remnant of the ancient Hadleigh Great Wood.

Bramble and honeysuckle are the main ground plants.

[3] There is access from Poors Lane, which runs through the site and separates Hadleigh Great Wood from Dodd's Grove.