Freestone · Mixed Sedimentary · Southland, NZ

Mataura River

Gore banner River

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.

Today · Slow going — pick your moments
Stonefly Nymph
Forecast · Today
Slow going — pick your moments
Slow going — pick your moments and do not force it.
45% projected
Today's fly
Stonefly Nymph
Stonefly Nymph
Conditions on the water · Today
Proxy gauge
Level
Rising
Proxy
via Pomahaka River
Water temp11.7°C
ClarityVery coloured
Weather12°C
WindN 17 km/h
Pressure1018 hPa
Rain · recent6.4 mm
Rain · ahead10.5 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
Ideal
12°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
Excellent water temperature is right today, though insect activity could be better.
Hatch timeline · todayPeak at 11am

12pm(now) NZ Green Stonefly

Stage: Creeping nymphsApproach: Heavy nymphActivity: 45%
Also:Deleatidium / NZ Mayfly Dun26%Reed Smut23%
Peak emergence window3 food groups active

Peak activity at 11amNZ Green Stonefly (NZ Green Stonefly, Peak emergence window)

Sub-surface · on the nymphunder the surface

Hatch predictions

Supporters see the full sub-surface read.

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Evidence
Records-basedModerate confidence

Based on species-occurrence records, not local invertebrate surveys.

Through the year
0–3 scale · September 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
Gallery · 2
  1. Gore banner River
  2. Terrain map of the venue
    Terrain map
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

Hatches & food

The best-documented hatch on any New Zealand venue in this catalogue — Deleatidium mayflies hatch throughout the river in autumn (March, with Fish & Game recommending the open middle reach into May) under 12-18°C, cooler overcast conditions, with recorded activity around mid-morning and mid-to-late afternoon; local reports also describe a strong early-season spring hatch and summer evening caddis.

  • River
  • Mixed sedimentary
  • Unconfined
  • Pool riffle
  • Glide
The full read · show the working · for Brown Trout · confidence 75%
How the 83 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity48 × 12%5.8
Conditions total= 83
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Pomahaka Riverproxy
Prey activitymodelled from regional profilemodelled
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