Spate · Slate · Asturias, Spain

Río Porcía

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

Prime · Brown Trout
Ignita CDC · 16-20
Primelive now
About as good as it gets
River high but settled. Coloured water — fish bigger and deeper, confident takes down the seams.
75% confidence
What moved it
  • Level1.46 mLast reading 1h ago
  • Water temp15.4°C
  • ClarityClear
Today’s fly
IC
Ignita CDC16-20
Upstream dry, on top
Conditions on the water
Live gauge
Level
Steady
1.46 m
lowspate
Water temp15.4°C
ClarityClear
Weather14°C
WindNE 13 km/h
Pressure1028 hPa
Rain · recent0.9 mm
Rain · ahead1.0 mm

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

Water temperature for brown trout
Ideal
15°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
Excellent — water temperature is right today, though insect activity could be better.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 10 active hatches hour by hour 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.
  • Asturian fishing licence required
  • In 2026 many trout waters run to 15 August, but salmon zones, mountain zones, tramos sin muerte, and border stretches can differ
  • Check local coto and tramo rules before fishing.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 1
  1. 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 75%
How the 80 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time45 × 13%5.9
Pressure80 × 7%5.6
Insect activity45 × 12%5.4
Conditions total= 80
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Related guides
Booking & contacts