Freestone · Mixed · Primorsko-goranska / Gorski Kotar

Kupa (Upper / Risnjak NP)

Konjic venue image
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Strict conservation fly fishery within Risnjak National Park — catch-and-release only, barbless hooks, no boats, no night fishing.

Species

A proper day on the water

Low and clear — careful approach country. Stay small, stay accurate.

55% confidence in this read
Water temperature for grayling
Ideal
5°C est.ideal 414°C
0°14°28°
Why this score · for grayling
  • Temperature10028% weight
  • Flow8022% weight
  • Clarity8518% weight
  • Feeding Time1013% weight
  • Pressure807% weight
  • Prey Activity2312% weight
Conditions
Level
Light rain recently
No gauge reading
Water temp
5.1°C
Estimated
Clarity
Clear
Air temp
1°C
Wind
N 12 km/h
Light breeze
Pressure
1011 hPa
Rain · 48h
4.2 mm
Light rain
Rain · ahead
1.4 mm
No meaningful rain · next 48h

Live readings — water temperature is an estimate where the gauge does not record it.

How to fish it · for grayling
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
10 ft #3 rod, floating line, long leader to 4 lb fluoro for nymphs.
Why this works
Good conditions. Temperature is favourable (100), Feeding time is weakest (10).
Through the year
0–3 scale · May highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
1
Grayling seasonSeason
1
2
2
2
2
1
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
1

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Gallery · 1
  1. Terrain map of the venue
    Terrain map
Permits & access
Permit required — see local rules.
  • Croatian fishing licence plus local permit
  • Risnjak park section is catch-and-release, fly only, single barbless hook, no boats, and no night fishing
  • Park entrance also applies.
Directions
About this water

Strict conservation fly fishery within Risnjak National Park — catch-and-release only, barbless hooks, no boats, no night fishing. The upper Kupa flows through dense Gorski Kotar forest with brown trout and grayling in classic upland freestone water. Good hatches of olives, caddis and stoneflies through spring and summer. Euro nymphing and dry fly both productive. Deeper stretches also hold huchen — strictly regulated trophy fishery in winter.

  • Mixed
Seasons & zones
  • Trout16 May → 30 September
  • Grayling16 May → 15 October
  • Hucho1 October → 28 February
Other water nearby · 5
Booking & contacts