The most important wetland area in Hastings is Combe Haven Valley. The valley contains Filsham Reedbed, one of the largest reedbeds in South East England and many rare birds have been recorded breeding there including Savi's warbler and spotted crake. The valley also contains a range of other wetland habitats including grazing marsh, freshwater drainage ditches, willow carr and sedge fen.
Many ponds and a small number of larger reservoirs can be found throughout the town. Wishing Tree reservoir, Bucks Hole Reservoir and Ecclesbourne Reservoir are all excellent sites for fishing and wildlife watching. Kingfishers, grass snakes and grey wagtails are commonly seen by anglers at all these reservoirs.