The Walawe (Sinhala: වලවේ ගඟ, Tamil: வளவை ஆறு) is a 138 km (86 mi) long river in Sri Lanka which originates on Adam's Peak. It discharges into the Indian Ocean at the coastal town of Ambalantota.
Belihul Oya, a major tributary to the Walawe River, near its source in Horton Plains.
