Upper Hamble Estuary and Woods is a 151.2-hectare (374-acre) biological Site of Special Scientific Interest east of Southampton in Hampshire.

[1][2] It is part of Solent and Southampton Water Ramsar site[3] and Special Protection Area,[4] and of Solent Maritime Special Area of Conservation.

[5] Part of the site is in Manor Farm Country Park, which is a Local Nature Reserve.

[6] This site comprises the upper estuary of the River Hamble, together with adjoining saltmarsh, reedswamp and ancient semi-natural woodland.

There is also a narrow zone of mudflats, with large numbers of marine worms, crustaceans and molluscs, which provide food for birds.