Lake Opuha is a sheltered hydro lake in the Fairlie Basin of Mackenzie Country, 12 kilometres from Fairlie township. It’s one of the more versatile recreational lakes in South Canterbury — offering swimming, boating, kayaking, water skiing and fishing in a setting backed by the Two Thumb Range.
Practical Information
| Location | 12km from Fairlie, Fairlie Basin, Mackenzie Country |
|---|---|
| Main swim area | Bennetts Road reserve — toilets, parking, picnic areas |
| Second site | Ewarts Corner Boat Ramp — also LAWA monitored |
| Entry | Free |
| Activities | Swimming, boating, kayaking, water skiing, trout and salmon fishing |
| Facilities | Toilets, parking and picnic areas at Bennetts Road; boat ramp at Ewarts Corner |
| Water quality | LAWA monitored during summer — check before swimming |
About the Lake
Lake Opuha was created by the Opuha Dam, completed in 1998, which impounds the Ōpūhau River in a sheltered valley in the Fairlie Basin. The lake sits at the northern edge of the Mackenzie Country, with views back towards the Two Thumb Range and the hills surrounding Fairlie. Unlike the larger, glacier-fed alpine lakes further west (Tekapo, Pukaki, Ohau), Opuha is a warmer, calmer lake that supports recreational swimming in summer.
The lake is managed partly for irrigation water supply by Opuha Water Ltd, which also monitors the lake level and publishes recreational updates during the summer season.
Swimming
The main swimming spot is the Bennetts Road reserve on the north-east shore — calm bays with a grassy foreshore, toilets, parking and picnic areas. The reserve is described as “fantastic” for swimming and is the primary summer recreation area on the lake. The north-east end has calm, sheltered bays well suited to family swimming and paddling.
A second LAWA-monitored site is located at the Ewarts Corner Boat Ramp, which also provides lake access for water skiers and boats.
Walking Track
A walking track follows the perimeter of the lake from the Bennetts Road reserve. The track provides views of the lake with the Two Thumb Range as a backdrop — a more accessible mountain landscape than the dramatic but remote Tekapo and Pukaki settings further west.
Water Quality
Lake Opuha is monitored by Environment Canterbury for recreational water quality. Check the LAWA website for current results at both sites before swimming, and avoid swimming for 48–72 hours after significant rainfall. Warm, calm conditions in late summer can occasionally trigger algae growth — check LAWA if conditions look unusual.
Where to Learn More
LAWA — Lake Opuha at Recreation Reserve — current water quality data for the Bennetts Road reserve swim site.
LAWA — Lake Opuha at Ewarts Corner Boat Ramp — current water quality data for the boat ramp swimming site.
Opuha Water — Lake Level and Recreation — lake level updates and recreational conditions from the lake manager, useful in planning a visit.
Mackenzie NZ — Lakes and Swimming — regional overview of swimming lakes in the Mackenzie Country.
FAQ
Where is Lake Opuha?
12km from Fairlie in the Fairlie Basin, Mackenzie Country. The main swim area is the Bennetts Road reserve on the north-east shore.
Is Lake Opuha good for swimming?
Yes — the Bennetts Road reserve has calm bays well suited to swimming and family recreation. LAWA grades are generally positive for this site.
Can I bring a boat to Lake Opuha?
Yes — the Ewarts Corner Boat Ramp provides launch access for boats, water skiers and kayaks.
Is there a walking track at Lake Opuha?
Yes — a walking track follows the lake perimeter from the Bennetts Road reserve with views of the Two Thumb Range.
Is the water safe to swim in?
Check LAWA for current water quality before visiting. Avoid swimming 48–72 hours after heavy rain, and check for algae warnings in warm settled conditions.
Is entry free?
Yes — the Bennetts Road reserve and Ewarts Corner boat ramp are free to use.
Lake Opuha is listed in the Swimming in Timaru guide. For more on Mackenzie Country lake swimming, the Mackenzie lakes swimming guide covers Lake Ruataniwha and Loch Cameron near Twizel. The Waihi Gorge near Geraldine is a river swimming option if you’re travelling between Timaru and the Mackenzie.
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