| Rainy River | |
| Mouth Location: | Pelorus River |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Length: | 5km (03miles) |
| Source1 Elevation: | 790m (2,590feet) |
| Mouth Elevation: | 40m (130feet) |
The Rainy River is a short river of the northeastern Marlborough Region of New Zealand's South Island. The 790-metre Rainy flows north from the Richmond Range into the Pelorus River, which it reaches five kilometres west of Pelorus Bridge.[1]