Limestone · Karst · Splitsko-dalmatinska / Split, HR

Jadro

Rijeka Jadro

Short karst spring river near Split — one of the key remaining habitats of the endemic softmouth trout under significant urban and environmental pressure.

Today · About as good as it gets
Coch-y-bonddu
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.
90% projected
Today's fly
Coch-y-bonddu
Coch-y-bonddu
Conditions on the water · Today
Proxy gauge
Level
Steady
Proxy
via Zrmanja
Water temp12.9°C
ClarityClear
Weather20°C
WindN 16 km/h
Pressure1024 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

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

Water temperature for Brown Trout
Ideal
13°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
Excellent — water temperature is right today, though time of day could be better.
Likely species
Mayflies
Stoneflies
Caddisflies
Gammarids
Hatch timeline · todayPeak at 2pm

12pm(now) — Reed Smut

Stage: On emergersApproach: Emerger or dryActivity: 52%
Also:Brown Sedge47%Pale Watery45%
Peak emergence window9 food groups active

Peak activity at 2pm — Brown Sedge (Brown Sedge, 11 food groups active)

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 3 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
Brown Trout fly box

Ultra-clear spring-fed rivers with large educated trout. Sight fishing, technical presentation, fine tippets. Euro-nymphing dominant subsurface method. Exceptional dry-fly windows during hatch periods. Gacka is the flagship water.

SW
Streamer / Woolly BuggerTop
6-10 · Pattern
High-confidence seasonal pick
Permits & access
Permit required — see local rules.
  • Very limited access
  • Treat Jadro as a conservation-first endemic river, not as a normal recreational trout venue.
What's coming
Plan ahead
5-day outlook
Gallery · 2
  1. Rijeka Jadro
  2. Terrain map of the venue
    Terrain map
About this water

Short karst spring river near Split — one of the key remaining habitats of the endemic softmouth trout under significant urban and environmental pressure. Spring-fed and thermally stable. WFD ecological status is 'Poor', reflecting the challenges facing this short urban-fringe river. Very limited fishing access due to the conservation status of the endemic softmouth; scientific and conservation interest is high, but recreational value is tightly constrained.

  • Karst
Water quality (WFD)
  • Ecology: Poor
  • Chemical: Unknown

WFD classification · HRJKRN0302_001

The full read · show the working · for Brown Trout · confidence 90%
How the 84 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time55 × 13%7.2
Pressure80 × 7%5.6
Insect activity68 × 12%8.2
Conditions total= 84
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via Zrmanjaproxy
Prey activitymodelled from regional profilemodelled
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout restricted → restricted
Related guides
Euro Nymphingsubsurface methods
Booking & contacts