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.

Poor · Brown Trout
Streamer / Woolly Bugger · 6–10
Closed season
Out of season. Try elsewhere.
Closed — confidence not applicable today.
What moved it
  • LevelProxyvia Zrmanja
  • Water temp11.2°C
  • ClarityClear
Today's fly
SW
Streamer / Woolly Bugger6–10
High-confidence seasonal pick
Conditions on the water
Proxy gauge
Level
Steady
Proxy
via Zrmanja
Water temp11.2°C
ClarityClear
Weather8°C
WindNE 24 km/h
Pressure1011 hPa
Rain · recent7.4 mm
Rain · ahead10.5 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
11°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.
Likely species
Mayflies
Stoneflies
Gammarids
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 6 active hatches hour by hour as a supporter.

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Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 4 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 · November 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

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 75%
How the 0 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity61 × 12%7.3
Conditions total= 81
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
At a glance

Jadro is a limestone river in Splitsko-dalmatinska / Split, Croatia. Its recorded elevation is about 90 m above sea level and the catchment geology is karst. The species listed for this water is brown trout. The trout season is recorded as running from restricted to restricted. Best window recorded for anglers: May–August. Core methods listed: Upstream nymph; Dry fly. Its Water Framework Directive ecological status is recorded as poor.