Freestone · Limestone · Primorska / Tolmin, SI

Tolminka

Tolminka — Tolminka river

The Tolminka is the single most conspicuous gap this pack has had — RD Tolmin manages nine named rivers over some 140 km of water, and until now the app carried four of them.

Prime · Grayling
F-fly · 14–18
Primelive now
About as good as it gets
River steady at a fishable height. On the feed top to bottom — start on the rises with a dry, drop a nymph if they stay down.
90% confidence
What moved it
  • Level0.78 mLast reading 3h ago
  • Water temp8.1°C
  • ClarityClear
Today's fly
F-fly
F-fly14–18
in season · regional default
Conditions on the water
Live gauge
Level
Steady
0.78 m
Last reading 3h ago
Water temp8.1°C
ClarityClear
Weather16°C
WindE 16 km/h
Pressure1023 hPa
Rain · recent0.0 mm
Rain · ahead0.3 mm

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

Water temperature for Grayling
Ideal
8.1°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. Grayling feeds actively in cold water — peak winter sport.
Likely species
Mayflies
Stoneflies
Caddisflies
Gammarids
Molluscs
  • Pond snailsMost likelyLower confidence
    #10–12–14 · Adult
    Dead-drift or twitch a snail pattern near weed beds.
Oligochaetes
  • Aquatic wormsMost likelyLower confidence
    #12–14–16 · Adult
    Dead-drift a worm pattern deep - a year-round staple.
Hatch timeline · todayPeak at 10am

Hatch predictions

Today's headline hatch shown — see all 12 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 2 guilds as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Supporters see what else is on the menu.

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Evidence
Records-basedModerate confidence

Based on species-occurrence records, not local invertebrate surveys.

Through the year
0–3 scale · October 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
Evening SedgeHatch
2
3
3
3
2
Alpine RhithrogenaHatch
1
2
2
1
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
2
2
2
2
1

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 Tolmin district permit
  • Fly-only, barbless throughout
  • Tolmin Gorge closed entirely.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
River Bača
1.0 km
Brown trout · Marble trout · Rainbow trout
Kneža
8.0 km
86
Marble trout · Brown trout · Grayling
Koritnica (Bača tributary, Rut)
10 km
86
Marble trout · Brown trout · Grayling
Savica
12 km
Brown trout · Lake trout
River Trebuščica
14 km
Brown trout · Marble trout
Gallery · 2
  1. Tolminka — Tolminka river
    Tolminka river
  2. Terrain map of the venue
    Terrain map
About this water

It runs 10.2 km from the Julian Alps down to the Soča confluence at Tolmin town, past the club's own Faronika hatchery, which sits right at that confluence and does more than any single measure to explain why pure marble trout are again the dominant salmonid in this watershed rather than a relic of it. The Tolmin Gorge reach is closed entirely — a natural monument inside Triglav National Park, and rightly so; the rest is a C&R section fished the way you'd fish any small limestone river that happens to hold genuinely wild fish: quietly, on a light rod, with barbless hooks because the rules say so and because it's obviously the right thing to do.

  • River
  • Limestone
The full read · show the working · for Grayling · confidence 90%
How the 85 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity85 × 18%15.3
Feeding Time90 × 13%11.7
Pressure80 × 7%5.6
Insect activity55 × 12%6.6
Conditions total= 85
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. Always check the Ribiška Družina (fishing district) permit for the specific beat.

    Prime sport 1 September → 30 November

  • Marble trout 1 April → 31 October
Related guides
Fly Fishing in Slovenia: A Year-Round Guidefeatured in this guideGrayling Playbookgrayling tacticsAlpine Streamsmountain entomology
Booking & contacts
Clubs & associations
  • RD Tolmin
    Permit required
At a glance

Tolminka is a freestone river in Primorska / Tolmin, Slovenia. The catchment geology is recorded as limestone, and the water sits at about 180 m above sea level. The river is described as roughly 10 km long. Our data lists 5 species here, including marble trout, marble brown hybrid trout and brown trout. The trout season is recorded as running from 1 March to 30 September. The marble trout season is recorded as running from 1 April to 31 October. Best window recorded for anglers: May–June, September–October. Core methods listed: Dry fly; Upstream nymph. Level and flow data for this water is linked from 1 gauge. Nearby waters in our listings include River Bača at 1.0 km, Kneža at 8.0 km and Koritnica (Bača tributary, Rut) at 10 km.