Last updated October 2026
The Opihi River (Ōpihi) is a significant South Canterbury waterway that originates in the Mackenzie Country and flows southeast through Temuka before reaching the Pacific Ocean. Its lower reaches near Pleasant Point and Temuka offer the most accessible public access points for recreation.
Popular activities include swimming at monitored sites, trout and salmon fishing, and walking along riverside tracks. Water quality is variable and requires checking before any in-river activity.
Swimming Facts
Before you swim: Tested weekly Nov–Apr by Environment Canterbury. Stay out for 48 hours after heavy rain. Latest result on LAWA
Today at Opihi River
Tuesday 27 OctoberWater quality track record
What the grades mean
Excellent and Good: rarely unsafe for swimming. Fair: usually fine, but avoid swimming after rain. Poor: often unsuitable, especially after rain, so check the latest result first.
Grades use LAWA’s method: the 95th percentile of routine E. coli results over the five summers from 2020/21 to 2024/25, with at least 50 tests (676 per 100 mL from 74 tests).
Opihi River at a Glance
- Swim sites
- Saleyards Bridge near Pleasant Point; SH1 Bridge at Temuka
- Activities
- Swimming, trout and salmon fishing, walking
- Water quality monitoring
- Weekly by Environment Canterbury from 1 November to 31 March; check LAWA
- River character
- Braided lowland river in lower reaches; hill-fed in middle and upper sections
- Fishing season
- Trout: 1 October to 30 April; Salmon: 1 October to 31 March (check current regulations)
What to Expect
The Ōpihi drains the Mackenzie Basin and crosses the Canterbury Plains, becoming a wide, braided lowland river by the time it reaches Temuka. Agricultural land use in the catchment contributes to water quality pressures including E. coli and occasional cyanobacteria blooms during low-flow periods.
The river supports a valued salmon and trout fishery. Salmon runs occur from the coast in summer and autumn, while trout are present year-round in suitable reaches. Licensed anglers must follow Fish & Game Central South Island regulations.
Public access includes riverside walking tracks. The Temuka and Opihi River Walk starts from the Temuka Domain area and follows the bank. Further upstream, the Opihi Walkway runs along stopbanks in places.
Swim Sites
The Saleyards Bridge site near Pleasant Point has a more hill-fed character and is one of the monitored locations. The SH1 Bridge site at Temuka is in the lower braided section on the outskirts of town, with access tracks through scrub and willows.
Both sites are tested weekly during the summer monitoring period. Swimming is not recommended for up to 48 hours after heavy rain due to elevated E. coli risk. Cyanobacteria can also be present in warm, low-flow conditions.
Fishing the Opihi River
The Ōpihi is a recognised trout and salmon fishery in the Central South Island region. Brown and rainbow trout are available, with salmon entering from the sea during the season. Anglers should consult the latest Fish & Game regulations for bag limits, methods and any temporary restrictions.
Walking Tracks
The Temuka and Opihi River Walk provides an easy riverside option starting near the Temuka Domain. The Opihi Walkway follows stopbanks for longer distances in places, offering flat terrain with views across the river valley.
Water Quality
Environment Canterbury monitors the two main swim sites weekly from 1 November to 31 March. Results are published on the LAWA website. Water quality frequently declines after rainfall, and toxic algae warnings are issued periodically. Always check current conditions before swimming or other contact activities.
Official Sources
LAWA — Opihi River at Saleyards Bridge: current water quality data and swim suitability for the Pleasant Point site.
LAWA — Opihi River at SH1 Bridge: current water quality data and swim suitability for the Temuka site.
Timaru District Council — Opihi Walkway: details on the stopbank walkway route and access.
Your Questions Answered
Where can I swim in the Opihi River?
The main monitored sites are Saleyards Bridge near Pleasant Point and the SH1 Bridge at Temuka. Both are tested weekly during summer.
Is the Opihi River clean enough to swim in?
Water quality varies and often declines after rain. Check the LAWA website for current results and avoid swimming for up to 48 hours after heavy rainfall.
Can I fish the Opihi River?
Yes, the river supports trout and salmon. A valid Fish & Game licence is required and seasonal regulations apply.
Are there walking tracks beside the Opihi?
Yes, the Temuka and Opihi River Walk starts from the Temuka Domain, and the Opihi Walkway follows stopbanks in sections.
What is the Saleyards Bridge site like?
It is a monitored swim location near Pleasant Point with a hill-fed character and generally better water quality than the lower braided reaches.
When is the fishing season on the Opihi?
Trout season runs 1 October to 30 April and salmon 1 October to 31 March, subject to current Fish & Game rules.
Who monitors water quality?
Environment Canterbury tests the sites weekly from 1 November to 31 March, with results available on LAWA.
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