| Warenai River | |
| Name Other: | Sungai Warenai, Warenai-rivier |
| Pushpin Map: | Indonesia Central Papua#Indonesia |
| Pushpin Map Caption: | Location of river mouth |
| Source1 Location: | Central Papua |
| Mouth Location: | Cenderawasih Bay, Nabire Regency |
| Subdivision Type1: | Country |
| Subdivision Name1: |  Indonesia |
| Length: | [1] |
| Discharge1 Avg: | [2] |
| Basin Size: | [3] |
The Warenai River is a river in northern New Guinea, Central Papua, Indonesia.[4] [5] Tributaries include the Wapoga River.
The river flows in the northern area of Papua with predominantly tropical rainforest climate (designated as Af in the Köppen-Geiger climate classification).[6] The annual average temperature in the area is 23 °C. The warmest month is February, when the average temperature is around 24 °C, and the coldest is November, at 22 °C.[7] The average annual rainfall is 5824 mm. The wettest month is March, with an average of 733 mm rainfall, and the driest is October, with 300 mm rainfall.[8]