Limestone · Inner Carniola / Planina

Unica

The Unica's eastern distributary flowing across the flat Planina karst plain, reed-fringed banks under open sky.

The Unica does something most rivers don't bother with: it disappears.

Prime · Brown Trout
Elk Hair Caddis · 12-16
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
  • Level25.00 mLast reading 15h ago
  • Water temp9.8°C
  • ClarityClear
Today's fly
Elk Hair Caddis
Elk Hair Caddis12-16
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
25.00 m
Last reading 15h ago
Water temp9.8°C
ClarityClear
Weather24°C
WindNE 20 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 Brown Trout
Cool — slow
9.8°Cideal 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 insect activity could be better.
Likely species
Mayflies
  • Anglers curse mayfliesMost likelyLower 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.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 3 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 3 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
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Alpine RhithrogenaHatch
1
2
2
1
Large Dark OliveHatch
1
2
2
1

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.

Permits & access
Permit required — see local rules.
  • Fishing licence + permit from ribiške družine.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Cerkniščica
9.0 km
Brown trout
Ljubljanica
16 km
Hucho · Grayling · Brown trout
Bistra
17 km
Brown trout · Grayling · Rainbow trout
Ljubija
17 km
Brown trout · Grayling · Rainbow trout
River Reka
23 km
Brown trout
Gallery · 6
  1. The Unica's eastern distributary flowing across the flat Planina karst plain, reed-fringed banks under open sky.
    Unica on the Planinsko polje
  2. The Unica meandering across the Planina karst plain with grassy banks and karst hills in the distance.
    Unica on the Planina plain
  3. The Unica at the northern edge of the Planina Plain, approaching the ponor sinks.
    Unica at the northern edge of the polje
  4. The Unica emerging from the mouth of Planinska jama into daylight, clear turquoise karst water.
    Unica emerging from Planinska jama
  5. The Unica flowing past the village of Jakovica, Municipality of Logatec, with meadows on the bank.
    Unica at Jakovica
  6. Terrain map of the venue
    Terrain map
About this water

The Unica does something most rivers don't bother with: it disappears. Karst water out of the Planina cave system, spring-fed and limestone-clear, and it goes underground and comes back up again somewhere else entirely — geological theatre that happens to also hold wild brown trout. The hatches on a warm evening can be genuinely exceptional, which feels almost unfair given everything else the river's already got going for it. Fish it for the trout and stay for the fact that you're standing on a river that periodically isn't there.

  • River
  • Limestone
Water quality (WFD)
  • Ecology: Good
  • Chemical: Unknown
What this classification means

WFD ecological status High → Good corrected to EEA WISE 2022 (3rd RBMP) classification for waterbody SI145VT (was a stale earlier-cycle value). Source: EEA WISE SWB_SurfaceWaterBody (discodata.eea.europa.eu), verified 2026-06-18.

WFD classification · SI145VT

The full read · show the working · for Brown Trout · confidence 90%
How the 83 is built — score × weight = contribution
Temperature96 × 28%26.9
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time65 × 13%8.5
Pressure80 × 7%5.6
Insect activity60 × 12%7.2
Conditions total= 83
Can you trust it?
Water temperaturelive gauge readinggauge
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.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 1 March → 30 September
Related guides
Alpine Streamsmountain entomologyMarble TroutSoča systemEuro Nymphingsubsurface methods
Booking & contacts