Ko Vainī ko e kolo lahi ia ʻi he vahe loto ʻo Tongatapu. ʻOku tuʻu ʻi he Hala Tāufaʻāhau ʻi he vahaʻa ʻo Veitongo mo Malapo, ʻoku manga ʻa e hala ki Longoteme.
Ofi ki Vainī, ʻi he hala ki hihifo, ʻoku tuʻu:
Ko e tofiʻa ʻo Maʻafu. Latitute longitute: 21°196 tonga 175°174 hihifo