Spate · Slate · Asturias, Spain

Río Porcía

Río Porcía — Río Porcía
Contributor photo

Río Porcía

Faviomuniz (https://commons.wikimedia.org/w/index.php?title=User:Faviomuniz&action=edit&redlink=1) - CC BY-SA

The Porcía is a responsive slate-country stream flowing 22 km through pastoral valleys.

Good · Brown Trout
Ignita CDC · 16-20
Goodlive now
A proper day on the water
River high but settled. Match the colour and fish the seams.
90% confidence
What moved it
  • Level1.45 mLast reading 5h ago
  • Water temp17.5°C
  • ClarityClear
Today’s fly
IC
Ignita CDC16-20
Upstream dry, on top
Conditions on the water
Live gauge
Level
Steady
1.45 m
lowspate
Water temp17.5°C
ClarityClear
Weather16°C
WindNW 9 km/h
Pressure1019 hPa
Rain · recent0.1 mm
Rain · ahead23.2 mm

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

Water temperature for brown trout
Warm — slow
18°C est.ideal 1016°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
Good — water clarity is right today, though time of day could be better.
Hatch timeline · todayPeak at 6pm

Hatch predictions

Today's headline hatch shown — see all 5 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

See the full sub-surface read 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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Evidence
Records-basedModerate confidence

Based on species-occurrence records, not local invertebrate surveys.

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

Ranked for today
Brown Trout fly box
Beats · 1
Porcia · 3.2 kmTrout permit
Trout permit stretch — La Corveira, puente del ferrocarril to 100 m por aguas arriba de la zona de embarcadero de las Barcas en Gobaz.
Beat detail
Daily permit required, keep within bag limits
Upstream: La Corveira, puente del ferrocarril
Downstream: 100 m por aguas arriba de la zona de embarcadero de las Barcas en Gobaz
Porcia beat map
Permits & access
Free state water
State rod licence required for trout / salmon as applicable.
  • Se requiere licencia de pesca asturiana
  • En 2026 muchas aguas de trucha se extienden hasta el 15 de agosto, pero las zonas de salmón, las zonas de montaña, los tramos sin muerte y los tramos fronterizos pueden diferir
  • Consulta las normas locales de coto y tramo antes de pescar.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
  1. Río Porcía — Río Porcía
    Río Porcía
  2. Terrain map of the venue
    Terrain map
About this water

The Porcía is a responsive slate-country stream flowing 22 km through pastoral valleys. Dark, polished pools and fast runs hold wild browns (14–26 cm, with larger residents in deep pools). The 3-hour spate response makes it perfect for visiting anglers. Mayfly and sedge hatches May–June; terrestrials work in summer. Straightforward roadside access and usually uncrowded, but Asturian licence and local tramo rules still apply. A river where responsive water rewards patient, careful presentation.

Under the surface

The Porcía runs from western Asturian slate country down toward the coast at Llanes province. The upper reaches are step-pool slate pocket water, steep and spate-responsive. The descent is rapid and the water amber-colored from its slate origins throughout. The middle Porcía opens slightly into partly-confined pool-riffle on cobble emerging from slate. The pools have been fished for generations; they're marked and known by local tradition. The river maintains its spate character — quick to rise, quick to fall, responsive to weather — throughout its course. The wading demands attention in the upper sections; the middle reaches become more approachable.

Wading: Slick wet slate ledges

  • Slate
  • Partly confined
  • Step pool
  • Plane bed
Water quality (WFD)
  • EcologyGood
  • ChemicalUnknown

WFD classification · ES018MSPFES236MAR002170

The full read · show the working · for brown trout · confidence 90%
How the 73 is built — score × weight = contribution
Temperature66 × 28%18.5
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time55 × 13%7.2
Pressure80 × 7%5.6
Insect activity59 × 12%7.1
Conditions total= 73
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones

Sea trout: Variable seasonal (2026)

Related guides
Booking & contacts