Freestone · Mixed Sedimentary · Otago

Greenstone River

Greenstone River terrain map
Poor · Brown Trout
Hare & Copper Nymph · 12-16
Closed season
Season reopens 1 November. Plenty of other water available now.
Closed — confidence not applicable today.
What moved it
  • LevelHeavy rain recentlyNo gauge reading
  • Water temp2.8°C
  • ClarityVery coloured
Today's fly
Hare & Copper Nymph
Hare & Copper Nymph12-16
High-confidence seasonal pick
Conditions on the water
Estimate
Level
Heavy rain recently
No gauge reading
Water temp2.8°C
ClarityVery coloured
Weather-4°C
WindSW 19 km/h
Pressure1004 hPa
Rain · recent36.1 mm
Rain · ahead2.7 mm

No gauge on this water — readings are regional estimates from weather, not a live gauge.

How these readings are sourced

Weather-only: no live gauge wired. Clear wilderness river — sight-fishing best on low, clear, stable water with good light.

Water temperature for Brown Trout
Cool — slow
3°C est.ideal 10–16°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.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 2 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds with Pro.

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Evidence
ModelledModerate confidence

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

Updated 4 hours ago

Through the year
0–3 scale · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
2
2
2
1
1
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.
  • Otago Fish & Game — a Fish & Game licence is required; back-country reaches typically open 1 November
  • Check the current Anglers Notice
  • Check Clean Dry (didymo present)
  • Public DOC access; tread lightly.
What's coming
Plan ahead
5-day outlook
The full read · show the working · for Brown Trout · confidence 40%
How the 0 is built — score × weight = contribution
Temperature3 × 28%0.8
Flow41 × 22%9.0
Clarity15 × 18%2.7
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity24 × 12%2.9
Limiting factor: Water temperature (2.8°C) is outside Brown Trout's preferred range (10–16°C)= 26
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
Warmer water — toward the 10–16 °C ideal band — would lift the temperature score.
A drop and clear would lift the flow and clarity scores.
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 1 November → 30 April

    Otago Fish & Game licence required. Back-country wilderness — light footprint. Legal status: guidance_not_permission.

Related guides
Euro Nymphingsubsurface methods
Booking & contacts