Guwa, also spelt Goa, Koa, and other variants, is an extinct and nearly unattested Australian Aboriginal language of Queensland spoken by the Koa people. It was apparently close to Yanda.
Guwa had a western and eastern dialect differentiation.
Based on the available data and other languages of the region, the following phoneme inventory can be determined.
Guwa has a three-vowel system /i, a, u/.