Chalk Stream · Limestone · Notranjska / Vrhnika

Ljubija

Ljubija terrain map

Sister stream to the Bistra, separately permitted, and carrying the same karst-spring character: brown trout, grayling, rainbow, pike, with huchen present.

Prime · Grayling
F-fly · sizes_14_18
Primelive now
About as good as it gets
River high but settled. Coloured water — fish bigger and deeper, confident takes down the seams.
90% confidence
What moved it
  • Level135.00 mLast reading 23h ago
  • Water temp12.1°C
  • ClarityClear
Today's fly
F-fly
F-flysizes_14_18
off-peak month · matches water height · regional default
Conditions on the water
Live gauge
Level
Steady
135.00 m
Last reading 23h ago
Water temp12.1°C
ClarityClear
Weather27°C
WindE 15 km/h
Pressure1024 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

Live readings only. Trends shown where the gauge supports them.

Water temperature for Grayling
Ideal
12.1°Cideal 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
Excellent — conditions well-balanced, with water temperature particularly in your favour.
Likely species
Mayflies
  • Iron BlueMost likely
    #16–18 · Dun
    Cold, grey day — the dun sits long. Good dry-fly water.
  • Large dark oliveAlso possible
    #14–16 · Emerger
    Dead-drift the emerger — it's sitting in the film.
  • Anglers curse mayfliesAlso possibleLower confidence
    #20–22 · Spinner
    Go tiny: 20-22 spent spinner, single fly, long tippet.
  • Blue-winged oliveAlso possible
    #16–18 · Dun
    Duns are up; a sherry spinner fall may follow.
Caddisflies
  • GrannomMost likely
    #14–16 · Pupa
    Pupa first, then dries as the adults come off.
  • Net-spinning caddis (S. Europe)Also possibleLower confidence
    #12–14–16 · Pupa
    Widespread riffle net-spinner; evening emergence.
  • Satin sedgeAlso possibleLower confidence
    #12–14 · Egg-laying
    Skitter it at dusk — this one's fished, not dead-drifted.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 5 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

See the full sub-surface read with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 4 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
Trout seasonSeason
1
2
2
2
2
2
1
Grayling seasonSeason
1
2
2
2
2
2
1
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
Grayling 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.

Permits & access
Permit required — see local rules.
  • RD Vrhnika — separately permitted from the Bistra and Ljubljanica.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Ljubljanica
1.0 km
Hucho · Grayling · Brown trout
Bistra
4.0 km
Brown trout · Grayling · Rainbow trout
Gradaščica
12 km
Brown trout · Grayling · Hucho
Iška
14 km
Brown trout · Grayling
Unica
17 km
Brown trout
About this water

Sister stream to the Bistra, separately permitted, and carrying the same karst-spring character: brown trout, grayling, rainbow, pike, with huchen present. RD Vrhnika again the managing club. Small water, worth pairing with the Bistra on the same trip since both are five minutes apart and neither takes long to fish properly.

  • River
  • Limestone
The full read · show the working · for Grayling · confidence 90%
How the 87 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time100 × 13%13.0
Pressure80 × 7%5.6
Insect activity65 × 12%7.8
Conditions total= 87
Can you trust it?
Water temperaturelive gauge readinggauge
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 1 March → 30 September
  • Grayling 16 May → 30 November

    Slovenian common default: grayling 16 May – 30 November (lipan). Permit and fishing district controlled — dates may vary by specific water.

    Prime sport 1 September → 30 November

  • Hucho 31 October → 15 February
Related guides
Hucho / Danube Salmonspecialist apex-predator guideChalkstream Playbookchalk stream tacticsGrayling Playbookgrayling tactics
Booking & contacts