Freestone · Mixed Sedimentary · Southland

Mataura River

Mataura River terrain map

The Mataura is one of the world's great brown-trout dry-fly rivers — a long, accessible Southland freestone famous for its reliable mayfly hatches and the afternoon rise.

Good · Brown Trout
Hare & Copper Nymph · 12-16
Goodlive now
A proper day on the water
Low and clear — careful approach country. Stay small, stay accurate.
75% confidence
What moved it
  • LevelProxyvia Pomahaka River
  • Water temp8.2°C
  • ClarityClear
Today's fly
Hare & Copper Nymph
Hare & Copper Nymph12-16
High-confidence seasonal pick
Conditions on the water
Proxy gauge
Level
Steady
Proxy
via Pomahaka River
Water temp8.2°C
ClarityClear
Weather4°C
WindSW 37 km/h
Pressure1002 hPa
Rain · recent1.2 mm
Rain · ahead13.1 mm

No gauge on this water — conditions are inferred from Pomahaka River. The trend transfers, the absolute level does not.

How these readings are sourced

Weather-only: no live gauge wired. Read flow trend and clarity — dry-fly best on low, clear water.

Water temperature for Brown Trout
Cool — slow
8°C est.ideal 1016°C
0°14°28°
How to fish it · for Brown Trout
When
Nymphing can work through most of the day.
Where
Cover mixed depths.
Method
Start with tight-line nymphs and adjust if fish rise or drift higher.
Kit
9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.
Why this works
Good — water clarity is working for you, but time of day is the limiting factor today.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 3 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

See the full sub-surface read with Pro.

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Evidence
ModelledModerate confidence

Modelled from regional ecology — no survey or occurrence data for this water yet.

Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
2
2
2
2
2
2
2
2
1
1
2
2
Deleatidium / NZ Mayfly DunHatch
3
3
3
3
2
2
3
3
3
Burrowing Mayfly / Green MayflyHatch
3
2
2
Caddis / SedgeHatch
3
3
3
2
2
3
Cased Caddis / CreeperHatch
3
3
3
2
2
3
3

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Brown Trout fly box
Permits & access
Permit required — see local rules.
  • Southland Fish & Game region — a Fish & Game licence is required
  • Check the current Anglers Notice for method, bag and any C&R water
  • Check Clean Dry (didymo present).
What's coming
Plan ahead
5-day outlook
Other water nearby · 2
About this water

The Mataura is one of the world's great brown-trout dry-fly rivers — a long, accessible Southland freestone famous for its reliable mayfly hatches and the afternoon rise. Wadeable along much of its length, with long glides and runs full of free-rising browns, it rewards the mayfly angler above all: a good dun, a sparse emerger, and fish that key tightly on the hatch. It fishes through a wide range of flows and is at its dry-fly best when low and clear.

Under the surface

The Mataura runs south from the Eyre and Garvie mountains through the green Southland farmland to the sea, an unhurried river of long gravelled glides and willow-shaded runs. It is brown-trout water of international renown, its fame built on the dependable afternoon mayfly hatches — the 'Mataura rise' — that bring fish up the length of the river.

Wading: Slick gravel, didymo, willow snags — wadeable but cautious

  • River
  • Mixed sedimentary
  • Unconfined
  • Pool riffle
  • Glide
The full read · show the working · for Brown Trout · confidence 75%
How the 69 is built — score × weight = contribution
Temperature68 × 28%19.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity41 × 12%4.9
Conditions total= 69
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Pomahaka Riverproxy
Prey activitymodelled from regional profilemodelled
What would change the calculation
Warmer water — toward the 10–16 °C ideal band — would lift the temperature score.
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
  • Trout year-round (lower/main river); some reaches 1 Octoberyear-round / 30 September

    Southland Fish & Game licence required. Legal status: guidance_not_permission — confirm reach rules in the current Anglers Notice.

Related guides
Booking & contacts