Holes Bay Nature Park is a protected area, 286 hectares in size, on and around Holes Bay, an embayment of Poole Harbour within the Borough of Poole that is important for wildlife, especially wetland birds.

The bay is divided into northern and southern areas by the South West Main Line from London to Weymouth which crosses it on an embankment.

South of the marina in the southwest corner of the bay is the Hamworthy Creeks Nature Reserve.

[2] The nature park is home to numerous species of bird including: avocet, black-tailed godwit, curlew, kingfisher, little egret, oystercatcher, red-breasted merganser, redshank, spoonbill, teal and widgeon.

[2] The bay is used for fishing and sealife includes: bass, mullet, flounder, corkwing wrasse, gobies, marine invertebrates such as king ragworm, clams and cockles.