The Opihi River is a lowland river in South Canterbury flowing into the sea near Temuka, around 15 kilometres north of Timaru. It holds good populations of brown trout through its middle and upper reaches, with autumn salmon running into the lower river and estuary. The river is managed by Fish & Game Central South Island, and a freshwater fishing licence is required.
Practical Information
| Species | Brown trout; autumn Chinook salmon (lower river/mouth) |
|---|---|
| Licence | Fish & Game Central South Island freshwater licence required |
| Best season | Trout: October–April; Salmon: March–May at the mouth |
| Access | Multiple road bridges and access points along SH1 and secondary roads |
| Notable spots | Arowhenua (near the mouth), Tengawai confluence, upper tributaries |
| Conditions | Low summer flows can concentrate fish; good visibility typical |
About the Fishery
The Opihi is a productive lowland trout fishery for much of its length. Brown trout are the primary target, with fish present year-round through the middle and upper reaches. The river runs clear and relatively low in summer — this can make trout visible and rewarding to target on dry flies and nymphs, though fish can also become wary in low, clear conditions.
In autumn, Chinook salmon enter the lower Opihi near Arowhenua and the estuary area. The salmon run here is modest compared to the Rangitata, but fish are present from March through May. The lower river around Arowhenua is the most productive area for salmon.
The Tengawai River, a tributary of the Opihi, also holds trout and provides additional access options. Low summer flows across the Opihi system mean anglers should check current river levels before visiting in midsummer.
Fishing Access
The Opihi is accessible at several road bridges along its length. The SH1 bridge at Temuka provides easy access near the lower river. Secondary roads crossing the middle reaches offer walk-in access to quality trout water. Most access points require a short walk to fishing water — a local map or Fish & Game access guide is helpful for planning a trip.
Where to Learn More
Fish & Game Central South Island — regional fishing information, licence purchasing, current conditions and access guides for the Opihi and other South Canterbury rivers.
FAQ
What fish are in the Opihi River?
Brown trout through the middle and upper reaches, and autumn Chinook salmon in the lower river and estuary around Arowhenua.
Do I need a licence to fish the Opihi?
Yes — a Fish & Game Central South Island freshwater fishing licence is required. Licences are available online and from local sports stores.
When is the best time to fish the Opihi for salmon?
March to May for salmon in the lower river and estuary. Trout fishing is best from October through April.
Where is the best access on the Opihi River?
The SH1 bridge at Temuka and secondary road bridges along the middle reaches are the main access points. The Arowhenua area is popular for autumn salmon.
Is the Opihi River near Timaru?
Yes — the lower Opihi is about 15 kilometres north of Timaru near Temuka and Arowhenua. The river is easily reached from Timaru via SH1.
The Opihi is one of several rivers covered in the Timaru Fishing guide. The Rangitata River Mouth is the premier salmon fishery in the region. Temuka is the nearest town for supplies and accommodation.
