Freestone · Mixed · La Seu d'Urgell to Lleida, Catalonia

Río Segre

Río Segre terrain map

Major Catalan Pyrenean river flowing from the Cerdanya plateau (Puigcerdà) through La Seu d'Urgell toward Lleida.

Poor · Brown Trout
Klinkhammer · 14-18
Poorlive now
Not the day for it
River temperature is the limiting factor today, not the flow. This is not the day to push it. Check the thermal advice above before you head out.
80% confidence
What moved it
  • Level0.67 mDropping after lift
  • Water temp18.6°C
  • ClarityUnfishableColouring up
Today's fly
Klinkhammer
Klinkhammer14-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.67 m
Dropping after lift
Water temp18.6°C
ClarityUnfishable
Weather19°C
WindNE 5 km/h
Pressure1024 hPa
Rain · recent0.0 mm
Rain · ahead9.4 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Brown Trout
Warm — slow
19°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown 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
Water at 18.6°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 3 active hatches hour by hour with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 2 with Pro.

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Through the year
0–3 scale · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
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.

Ranked for today
Brown Trout fly box
Permits & access
Permit required — see local rules.
  • Catalan fishing licence (llicència de pesca) required
  • Upper Segre carries multiple ZPCs (Zones de Pesca Controlada) — La Seu d'Urgell, Bellver, Martinet, Oliana area — each with its own permit allocation, season class (alta muntanya vs baixa muntanya), and method rules (amb mort vs sense mort)
  • Confirm the exact tramo and current Generalitat Resolució de vedes before planning.
What's coming
Plan ahead
5-day outlook
Water here around 19°C. Nothing cooler within range — carry a thermometer.
About this water

Major Catalan Pyrenean river flowing from the Cerdanya plateau (Puigcerdà) through La Seu d'Urgell toward Lleida. The upper river above Oliana reservoir is the trout fishery — clear freestone water in alpine/upper-Pyrenean character, holding wild Mediterranean-lineage browns across multiple ZPCs. La Seu d'Urgell is the natural access hub. Below the Oliana reservoir, the river enters a regulated, slower, warmer reach better known as a cyprinid and predator fishery — those lower beats aren't covered in detail here.

  • Mixed
The full read · show the working · for Brown Trout · confidence 80%
How the 0 is built — score × weight = contribution
Temperature46 × 28%12.9
Flow80 × 22%17.6
Clarity0 × 18%0.0
Feeding Time55 × 13%7.2
Pressure80 × 7%5.6
Insect activity47 × 12%5.6
Limiting factor: Water is unfishable — too coloured for Brown Trout= 49
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
A drop and clear would lift the flow and clarity scores.
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout depends on Catalan ZPC class → depends on Catalan ZPC class
Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts