Chalk Stream · Limestone · Notranjska / Vrhnika

Ljubljanica

Ljubljanica — Ljubljanica river in Ljubljana

Slovenia's premier accessible huchen river, and a venue archetype this pack has had no example of before: a thermally stable, karst-spring-fed lowland river, gin-clear and slow through the Ljubljana marshes, holding huchen, grayling, brown and rainbow trout alongside nase, barbel, chub, pike and catfish.

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
  • Level68.00 mLast reading 11h ago
  • Water temp13.1°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
68.00 m
Last reading 11h ago
Water temp13.1°C
ClarityClear
Weather28°C
WindE 14 km/h
Pressure1021 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

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

Water temperature for Grayling
Ideal
13.1°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 — water temperature is right today, though insect activity could be better.
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
  • Satin sedgeMost likelyLower confidence
    #12–14 · Egg-laying
    Skitter it at dusk — this one's fished, not dead-drifted.
  • GrannomAlso possible
    #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.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 8 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 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 / RD Barje / RD Vevče
  • Huchen: separate €50 permit, mandatory guide (RD Vrhnika water).
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Ljubija
1.0 km
Brown trout · Grayling · Rainbow trout
Bistra
5.0 km
Brown trout · Grayling · Rainbow trout
Gradaščica
12 km
0
Brown trout · Grayling · Hucho
Iška
15 km
Brown trout · Grayling
Unica
16 km
Brown trout
Gallery · 2
  1. Ljubljanica — Ljubljanica river in Ljubljana
    Ljubljanica river in Ljubljana
  2. Terrain map of the venue
    Terrain map
About this water

Slovenia's premier accessible huchen river, and a venue archetype this pack has had no example of before: a thermally stable, karst-spring-fed lowland river, gin-clear and slow through the Ljubljana marshes, holding huchen, grayling, brown and rainbow trout alongside nase, barbel, chub, pike and catfish. RD Vrhnika, RD Barje and RD Vevče manage it between them.

  • 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 activity64 × 12%7.7
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