Spate · Mixed · Primorsko-goranska / Gorski Kotar

Kupica

Rijeka Kupica venue image
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Fast Kupa tributary in Gorski Kotar — cold, well-oxygenated spate water with wild brown trout and grayling.

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
6°C est.ideal 4–14°C
0°14°28°
Why this score · for grayling
  • Temperature10028% weight
  • Flow6022% weight
  • Clarity8518% weight
  • Feeding Time1013% weight
  • Pressure807% weight
  • Prey Activity1912% weight
Conditions
Level
Light rain recently
No gauge reading
Water temp
6.0°C
Estimated
Clarity
Clear
Air temp
5°C
Wind
NW 9 km/h
Light breeze
Pressure
1012 hPa
Rain · 48h
2.1 mm
Light rain
Rain · ahead
0.3 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
2
2
1
Grayling seasonSeason
1
2
2
2
2
1
March BrownHatch
2
3
2
GrannomHatch
2
2
Large StoneflyHatch
2
3
2
Yellow SallyHatch
2
3
2

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 + local permit.
Directions
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About this water

Fast Kupa tributary in Gorski Kotar — cold, well-oxygenated spate water with wild brown trout and grayling. Steep gradient with pocket water and short pools. Responsive to rain. Tight-line nymphing the dominant method on faster stretches. Part of the Gorski Kotar grayling river network.

  • Mixed
Seasons & zones
  • Trout1 March → 30 September
  • Grayling16 May → 15 October
Other water nearby · 5
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