HomeCentral South IslandCSI: Where to FishOhau River

Ohau River

 

The Ohau River is now a small river that has suffered from water extraction for the nearby Hydro Canals. It holds a small stock of resident fish is a series of pools.

Fish type Brown trout
Situation The Ohau river drains Lake Ohau and enters Lake Ruataniwha just south of Twizel.
Map and conditions

Access map

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View the river flow. 

Description Water extraction from Lake Ohau into the Ohau Canal has severely reduced the Ohau River flow. It is still a reasonably sized river however with a number of good runs and pools, particularly the section of the river from where it leaves Lake Ohau down to the Ohau B Power Station. Due to its glacial origins however, it often contains a degree of glacial silt that discolours the water making spotting of fish difficulty. Consequently, fishing blind with a nymph or spinner are the favoured options when fishing this water.
Access There is good access to the upper section from a road that follows both banks.
Methods This water is best fished with a nymph or spinner. At times the fish do rise to hatches and so the angler should be armed with the appropriate flies etc especially during the late spring and summer months.
Recommended tackle Rods of around 6 weight with a floating line for the nymph fishing or a spin rod capable of casting lures between 7 - 12g are recommended.
Recommended lures

Dry fly: Humpys, Blow Fly patterns, Red-tipped Governors and Coch-y-Bondhu or caddis patterns during the evening rise when it occurs.

Nymphs: Weighted nymphs in sizes 12 to 16 such as very roughly tied Hare and Copper, Pheasant Tail and Halfback
patterns.

Wetflies: Streamer flies such as a Parson's Glory, Grey Wulff and Jack Spratt

Spinners: Black and gold Toby's, Rapalas and Cobras

Biosecurity
Clean, check dry Because of the presence of the invasive alga didymo in these waters, anglers must clean their fishing gear including waders and boots, especially when moving between rivers.
Regulations (1)
Applicable to Ohau River
Region Central South Island regulations
Season 1 Oct-30 Apr
Methods Artificial fly, spinner, bait
Bag limit Trout: 2
Salmon: 2
Size limit (cm) Trout: No limit
Salmon: Minimum 300 mm
Regulations (2)
Applicable to Upper Ohau River between Lakes Ohau and Ruataniwha
Region Central South Island regulations
Season 1 Oct-30 Apr and

1 Sept to 30 Sept 2019

Methods Artificial fly, spinner, bait
Bag limit Trout: 2
Salmon: 2
Size limit (cm) Trout: No limit
Salmon: Minimum 300 mm

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