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.

Today · About as good as it gets
Brown Sedge Pupa
Forecast · Today
About as good as it gets
On the feed top to bottom — start on the rises with a dry, drop a nymph if they stay down.
55% projected
Today's fly
Brown Sedge Pupa
Brown Sedge Pupa
Conditions on the water · Today
Estimate
Level
Dry recently
No gauge reading
Water temp13.4°C
ClaritySlightly coloured
Weather18°C
WindN 9 km/h
Pressure1026 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

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

Water temperature for Grayling
Ideal
13°C est.ideal 4–14°C
0°14°28°
How to fish it · for Grayling
When
Midday window — grayling feed best from late morning into early afternoon.
Where
Work runs and glides — grayling shoal in the bottom third of the water column.
Method
Tight-line nymph the bottom third with weighted patterns.
Kit
10 ft #3 rod, floating line, long leader to 4 lb fluoro for nymphs.
Why this works
Good — water temperature is working for you, but time of day is the limiting factor today.
Likely species
Mayflies
Stoneflies
Caddisflies
Gammarids
Hatch timeline · todayPeak at 2pm

12pm(now) — Reed Smut

Stage: On emergersApproach: Emerger or dryActivity: 62%
Also:Brown Sedge55%Pale Watery49%
Peak emergence window9 food groups active

Peak activity at 2pm — Brown Sedge (Brown Sedge, Weather boost)

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 guilds as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 2 as a supporter.

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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
Freshwater ShrimpHatch
2
3
3
3
3
3
3
3
3
3
3
2
Brown SedgeHatch
2
3
3
3
2
Small SpurwingHatch
2
3
3
3
2
Small Dark OliveHatch
2
3
3
3
2

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

Ranked for today
Grayling fly box

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

Small Perdigón
Small Perdigón
Hook 14–18 · Fly
in season · matches water height
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
Other water nearby · 1
Neretva (Upper / Konjic)
< 1 km
Brown trout · Grayling
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 Grayling · confidence 55%
How the 71 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow60 × 22%13.2
Clarity85 × 18%15.3
Feeding Time15 × 13%2.0
Pressure80 × 7%5.6
Insect activity56 × 12%6.7
Conditions total= 71
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Related guides
Hucho / Danube Salmonspecialist apex-predator guideGrayling Playbookgrayling tacticsEuro Nymphingsubsurface methods
Booking & contacts