Last updated October 2026
The Waikaia River is a major tributary of the Mataura, running south from the Umbrella Mountains through the old gold-mining village of Waikaia to join the Mataura at Riversdale. It is a highly regarded brown trout river with easy access, run under a voluntary beat system.
Piano Flat, a DOC campsite beside the river 23 km north of Waikaia, sits on one of the four open reaches where you can fish without taking a beat.
At a Glance
- Location
- Umbrella Mountains to the Mataura River at Riversdale; Piano Flat campsite, 23 km north of Waikaia
- Type
- Clear upper river from tussock and swamp country; wider glides, pools and riffles over farmland below Piano Flat
- Water
- Freshwater (Fish & Game Southland)
- Main species
- Brown trout, usually 1 to 2 kg
- Season
- 1 October to 30 April (Waikaia River and tributaries)
- Methods
- Fly, spin and bait; no fishing from boats or flotation devices
- Access
- Voluntary beat system: 18 signposted beats and four open reaches
- Camping
- DOC Piano Flat Campsite, booked online
- Licence
- Fish & Game licence required
- Rules
- Fish & Game Southland Sports Fishing Regulations
Where to find it
Get directions · -45.56108, 169.01576
No tides here: rain in the hills colours and lifts the river, and low, clear summer water makes the trout harder to catch.
Setting and Background
The Waikaia rises in the Umbrella Mountains and flows south to the Mataura at Riversdale. Its headwaters are remote and hard to reach. The water there runs cool and clear out of swamp and tussock country. Downstream of Piano Flat the river opens out across farmland, with glides, deep pools and riffles that are easy to wade.
Lower down the river can colour after rain and turns more tea-stained close to the Mataura, so much of the fishing there is blind. The Dome Burn and Steeple Burn are spawning streams for the whole Mataura system, and trout move into the tributaries early in the season.
Waikaia village, 54 km north of Gore, grew from gold mining. Piano Flat, at the southern end of the Waikaia Forest Conservation Area, has been a camping spot since the Bunting family first camped there in 1928, and anglers helped make it popular. Ngāi Tahu hold a nohoanga site beside the campsite for access to customary fishing areas.
How to Fish the Waikaia River
The beat system
Fish & Game Southland runs a voluntary beat system on the main river. Each beat has a signpost and its own car park. Park at your chosen beat and fish only inside its boundaries; a vehicle at the sign tells other anglers the beat is taken.
If you are not leaving a vehicle there, put a note on the sign with the date, time and your plans. You may fish an occupied beat downstream of, that is behind, the angler already on it. Tributaries are not part of the system.
The open reaches
- Piano Flat Open Reach: beside the campsite at the top of the farmland water.
- Waikaia Township Open Reach: 5.4 km around the village.
- Mahers Beach Open Reach: 3.4 km.
- Waipounamu Bridge Open Reach: 0.7 km.
Normal angler etiquette applies on the open reaches, and anglers on the beats either side may fish into them. The beat boundaries are on the Fish & Game Southland access map.
When
Wading is easiest in summer. The fish are good sized but hard to catch when the river is low and clear, and hard to spot except in long dry spells and bright light.
What to use
- Nymphs: Pheasant Tail, Hare’s Ear and Hare and Copper; Willow Grubs in late summer when grubs are falling.
- Dry flies: Parachute Adams, March Brown, Kakahi Queen, Goddard’s Caddis and Dad’s Favourite.
- Wet flies: small hackled wee wets swung through the riffles.
- Spinners: very small Veltic or Mepps blades, or small Rapalas that look like juvenile trout.
- Gear: a 5 to 7 weight fly rod and a leader of about 12 feet.
Downstream, the Waikaia joins the Mataura, which has its own beats and access: see our Mataura River guide.
Getting There and Facilities
- Road: the Riversdale to Waikaia road follows the valley. Piano Flat is 23 km north of Waikaia via State Highway 93, Riversdale-Waikaia Road and Whitecoomb Street, and suits cars, campervans and caravans.
- Camping: Piano Flat Campsite is a DOC Standard campsite. Fees are $10 a night for adults and $5 for children aged 5 to 17; infants are free. Book online: no sites are held for people who turn up without a booking.
- Water: DOC recommends boiling the water or bringing your own treated water.
- Walks: the Waikaia River Track is an advanced 4 hour backcountry route. Part of it is closed after damage, between the Jack Edgerton Bridge and the Titans Rocks junction.
- Supplies: buy tackle and your licence before you leave the city. Licences are sold online through Fish & Game.
Rules and Safety
- You need a Fish & Game licence. The current season for the Waikaia and its tributaries is 1 October to 30 April, with fly, spin and bait allowed.
- No fishing from any boat or flotation device.
- The area floods in bad weather. Check the MetService forecast and the Environment Southland river levels before you go.
- Mine shafts and tomo are scattered through the Waikaia Forest area: keep to marked tracks. Watch young children near the river at Piano Flat.
- Water quality can drop in hot weather when algae grows; nzfishing.com warns the water is then unsafe to drink.
- Some Southland rivers carry didymo. Check, clean and dry your gear between rivers.
- Local residents and older, injured or less mobile anglers may reach the river in their usual way. Be courteous on the beats.
Official Sources for Waikaia River
Fish & Game: Waikaia River beat system: how the beats work, every beat and open reach, and the access map.
DOC: Piano Flat Campsite: bookings, fees, directions and alerts.
Fish & Game Southland regulations: the current season, methods and limits.
Common Questions
How does the Waikaia beat system work?
Park at a signposted beat and fish only inside it. A vehicle at the sign means the beat is taken. If you have no vehicle there, leave a note on the sign with the date, time and your plans.
Where can I fish without taking a beat?
On the four open reaches: Piano Flat, Waikaia Township (5.4 km), Mahers Beach (3.4 km) and Waipounamu Bridge (0.7 km).
When is the Waikaia River open for fishing?
The current season for the river and its tributaries is 1 October to 30 April.
Do I need a licence?
Yes. You need a Fish & Game licence, which you can buy online.
What flies work on the Waikaia?
Pheasant Tail, Hare’s Ear and Hare and Copper nymphs, Willow Grubs in late summer, and dries such as Parachute Adams, Kakahi Queen and Goddard’s Caddis.
Can I camp at Piano Flat?
Yes. It is a DOC Standard campsite 23 km north of Waikaia. You must book online before you arrive.
How big are the trout?
The river holds a large population of good sized brown trout, usually 1 to 2 kg.
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