Border river with huchen, grayling, and brown trout, warm limestone karst character. A southern Alpine experience on a river shared between nations.
- River
- Limestone
Rules at a glance
- Free fishing
- Fly only
A proper day on the water
Low and clear — careful approach country. Stay small, stay accurate.
55% confidence in this read
Live now
Conditions on the water
Trends shown where the gauge supports them
Level
Dry recently
No gauge reading
Water temp
7.2°C
Estimated
Clarity
Clear
Air temp
5°C
Wind
W 10 km/h
Light breeze
Pressure
1011 hPa
Rain · 48h
1.6 mm
No meaningful rain
Rain · ahead
0.1 mm
No meaningful rain · next 48h
Live readings — water temperature is an estimate where the gauge does not record it.
How to fish · for grayling
The brief
When · where · method · kit
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).
Hatches & runs
What's on, when
Twelve months at a glance
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
2
1
March BrownHatch
2
3
2
Large StoneflyHatch
2
3
2
Olive UprightHatch
2
3
3
2
Alpine RhithrogenaHatch
2
3
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Today's fly · curated pack
Top pattern + the box
6 patterns from this venue's curated pack
Detail · next 12h
Water temperature & rain
The two readings most likely to move the verdict
Water temperature for grayling
Ideal7°C est.ideal 4–14°C
0°14°28°
Evidence
Why today scores what it does
6 factors, signed
- Temperature10028% weight
- Flow6022% weight
- Clarity8518% weight
- Feeding Time1013% weight
- Pressure807% weight
- Prey Activity2812% weight
About this water
River Kolpa, end to end
Field guide · contributor-editedRiver Kolpa · about
What this water is
Background · character · contributors
About this water
River Kolpa · directions
How to get to the water
Directions
River Kolpa · zones
Where the rules change
Seasons · zones · per-species rules
Seasons & zones
- Trout1 March → 30 September
- Grayling16 May → 30 November
- Hucho1 October → 14 February
River Kolpa · permits
Licences, sorteo, the rules
Permits & access
Permit required — see local rules.
- Fishing licence + permit
- Shared with Croatia.
River Kolpa
Terrain map
Border river with huchen, grayling, and brown trout, warm limestone karst character.
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
Ideal7°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 Activity2812% weight
Conditions
Level
Dry recently
No gauge reading
Water temp
7.2°C
Estimated
Clarity
Clear
Air temp
5°C
Wind
W 10 km/h
Light breeze
Pressure
1011 hPa
Rain · 48h
1.6 mm
No meaningful rain
Rain · ahead
0.1 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
2
1
March BrownHatch
2
3
2
Large StoneflyHatch
2
3
2
Olive UprightHatch
2
3
3
2
Alpine RhithrogenaHatch
2
3
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Permits & access
Permit required — see local rules.
- Fishing licence + permit
- Shared with Croatia.
Directions
About this water
Border river with huchen, grayling, and brown trout, warm limestone karst character. A southern Alpine experience on a river shared between nations.
- River
- Limestone
Seasons & zones
- Trout1 March → 30 September
- Grayling16 May → 30 November
- Hucho1 October → 14 February
Other water nearby · 5
Booking & contacts