The Tyolomnqa Estuary is a significant estuarine system located within the Buffalo City Metropolitan Municipality in the Eastern Cape of South Africa. It is a tidal estuary formed by the Chalumna (Tyolomnqa) River, where freshwater inflows meet the Indian Ocean's saline waters. The environment features dynamic hydrological conditions with tidal exchanges, creating a mix of coastal thickets, estuarine wetlands, salt marshes, and sparse mangrove stands. The area experiences a moderate climate influenced by the warm Agulhas Current, with summer rainfall and distinct seasonal temperature variations. The estuary serves as a critical nursery for marine species and supports a diverse ecosystem, though it faces environmental challenges including altered freshwater inflows and invasive species.