The Kowie River is a significant stream system in South Africa's Eastern Cape, flowing from its headwaters near Makhanda (formerly Grahamstown) to its estuary at Port Alfred on the Indian Ocean. It presents a diverse fishery that transitions from freshwater riverine environments to a rich, tidal estuarine system at its mouth. The river supports a mix of native freshwater species, estuarine-dependent fish, and introduced non-native populations, creating varied angling opportunities throughout its course.