Freestone · Limestone · Primorska / Kobarid (Italian border), SI

Nadiža

Nadiža — Nadiža v Čedadu

The Nadiža rises in Italy, crosses briefly into Slovenia, and returns to Italy, leaving RD Tolmin just 11.

Good · Marble Trout
Light Sculpin · 4–8
Goodlive now
A proper day on the water
River steady at a fishable height. A proper day for it. Work the seams with an upstream nymph, switch to the dry when they show.
75% confidence
What moved it
  • Level1.05 mLast reading 3h ago
  • Water temp7.8°C
  • ClarityClear
Today's fly
Light Sculpin
Light Sculpin4–8
Swing, sub-surface
Conditions on the water
Live gauge
Level
Steady
1.05 m
Last reading 3h ago
Water temp7.8°C
ClarityClear
Weather3°C
WindNE 11 km/h
Pressure1025 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

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

Water temperature for Marble Trout
Cool — slow
7.8°Cideal 8–13°C
0°14°28°
How to fish it · for Marble 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
Good — water temperature is working for you, but insect activity is the limiting factor today.
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 · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 5 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

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
Marble 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.
  • RD Tolmin district permit
  • Fly-only, barbless.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Bela (Breginj)
4.0 km
75
Marble trout · Brown trout
Natisone
7.0 km
0
Brown trout · Marble trout · Grayling
Učja
9.0 km
73
Marble trout · Brown trout · Rainbow trout
Soča
17 km
76
Brown trout · Marble trout
Upper Soča (Trenta)
21 km
0
Marble trout · Grayling · Rainbow trout
Gallery · 2
  1. Nadiža — Nadiža v Čedadu
    Nadiža v Čedadu
  2. Terrain map of the venue
    Terrain map
About this water

9 km of it to manage — but that short reach runs markedly warmer and lower than the Soča a few valleys over, which makes it a genuinely different fishability window rather than a smaller version of the same river. Marble and hybrid trout share the water with grayling, rainbow trout, and — this being a border river with Italian water immediately downstream — Italian barbel, chub and nase drifting through. It fishes low and clear for longer into summer than the Soča does, which is either useful or irrelevant depending on when you're planning the trip.

  • River
  • Limestone
The full read · show the working · for Marble Trout · confidence 75%
How the 74 is built — score × weight = contribution
Temperature96 × 28%26.9
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time45 × 13%5.9
Pressure80 × 7%5.6
Insect activity43 × 12%5.2
Conditions total= 74
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
  • 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
Grayling Playbookgrayling tacticsAlpine Streamsmountain entomologyMarble TroutSoča system
Booking & contacts
Clubs & associations
  • RD Tolmin
    Permit required
At a glance

Nadiža is a freestone river in Primorska / Kobarid (Italian border), Slovenia. The catchment geology is recorded as limestone, and the water sits at about 210 m above sea level. The river is described as roughly 12 km long. Our data lists 4 species here, including marble trout, marble brown hybrid trout and grayling. 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–September — runs warmer/lower than the Soča, so summer fishes longer here. 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 Bela (Breginj) at 4.0 km, Natisone at 7.0 km and Učja at 9.0 km.