Brownsea Island Theatre, annually performing the works of William Shakespeare. The island has a visitor centre and museum, displaying the island's history. There is also a newly located shop and cafe, with one holiday cottage on the quay. At the Scout camp at the south-west of the Island there is an outdoor centre and a trading post shop which is focused on the Scout movement. The Dorset Wildlife Trust operates on the island from an old villa. The island has a single post box that is emptied each day. In October 2008, the island was featured on BBC One's annual "Autumnwatch" programme.
Brownsea Island island has a heronry, in which both grey heron and little egret nest. There is a large population of non-native sika deer on the island. In the past the numbers have been higher than the island can sustain and have overgrazed. To try to limit damage to trees and other vegetation by deer, areas of the island have been fenced off to provide areas of undamaged woodland to allow other species such as red squirrels to thrive. The lagoon is noted for the large population of common tern and sandwich tern in summer, and a very large flock of avocets