Karst Spring · Limestone · Herzegovina-Neretva Canton, BA

Neretva (upper / Herzegovina)

The upper Neretva is one of the iconic Dinaric limestone rivers — fast, cold, turquoise karst water descending through Herzegovina.

Marginal · Brown Trout
CDC Emerger · 16-20
Marginallive now
Slow going — pick your moments
River temperature is the limiting factor today, not the flow. Fish dawn or dusk if you go at all, and handle everything with extra care.
80% confidence
What moved it
  • LevelDry recentlyNo gauge reading
  • Water temp20.3°C
  • ClarityClear
Today's fly
CDC Emerger
CDC Emerger16-20
Proven pattern for this period
Conditions on the water
Estimate
Level
Dry recently
No gauge reading
Water temp20.3°C
ClarityClear
Weather24°C
WindE 4 km/h
Pressure1017 hPa
Rain · recent0.0 mm
Rain · ahead0.3 mm

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

Water temperature for Brown Trout
Warm — slow
20°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.
Why this works
Water at 20.3°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots.
Hatch timeline · todayPeak at 6pm

Hatch predictions

Today's headline hatch shown — see all 10 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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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 3 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 · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Brown SedgeHatch
2
3
2
Freshwater ShrimpHatch
2
3
3
3
3
3
3
3
3
3
3
2
Blue Winged OliveHatch
2
3
3
3
3
2
Mayfly (Green Drake)Hatch
2
2

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

Ranked for today
Brown Trout fly box

Technical clear-water trout fishing with strong nymphing and dry-fly windows, plus streamer support for marble trout and larger fish.

Permits & access
Permit required — see local rules.
  • Bosnia-Herzegovina fishing licence required
  • Softmouth trout has high conservation status — check current regulations before fishing.
What's coming
Plan ahead
5-day outlook
Water here around 20°C. Nothing cooler within range — carry a thermometer.
Gallery · 1
  1. Neretva (Upper / Konjic) — Bosnia IMG 9590 Konjic Neretva river
    Bosnia IMG 9590 Konjic Neretva river
About this water

The upper Neretva is one of the iconic Dinaric limestone rivers — fast, cold, turquoise karst water descending through Herzegovina. Home to the endemic softmouth trout (Salmo obtusirostris), brown trout, grayling, and hucho in the deeper pools. Among the most biodiverse salmonid rivers in Europe.

  • Limestone
The full read · show the working · for Brown Trout · confidence 80%
How the 26 is built — score × weight = contribution
Temperature21 × 28%5.9
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time80 × 13%10.4
Pressure80 × 7%5.6
Insect activity62 × 12%7.4
Limiting factor: Water temperature (20.3°C) is outside Brown Trout's preferred range (10–16°C)= 60
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
Related guides
Hucho / Danube Salmonspecialist apex-predator guideGrayling Playbookgrayling tacticsEuro Nymphingsubsurface methods
Booking & contacts