Spate · Slate · Asturias, Spain

Río Esva (Canero system)

The Río Esva flowing through riparian woodland in the Hoces del Esva gorge, Asturias.
Good · Brown Trout
Small Chironomid · 22-24
Goodlive now
A proper day on the water
River steady at a fishable height. A proper day for it. Work the seams with an upstream nymph, switch to the dry when they show.
75% confidence
What moved it
  • Level0.59 mLast reading 2h ago
  • Water temp12.2°C
  • ClarityClear
Today's fly
SC
Small Chironomid22-24
Upstream dry, on top
Conditions on the water
Live gauge
Level
Steady
0.59 m
lowspate
Water temp12.2°C
ClarityClear
Weather13°C
WindSW 7 km/h
Pressure1025 hPa
Rain · recent0.0 mm
Rain · ahead1.0 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
Ideal
12°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
Good — water temperature is working for you, but insect activity is the limiting factor today.
Likely species
Stoneflies
Gammarids
Hatch timeline · todayPeak at 11:00

Hatch predictions

Today's headline hatch shown — see all 6 active hatches hour by hour as a supporter.

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Evidence
Survey-backed · regionalHigh confidence

Backed by regional invertebrate surveys; no sampling on this exact reach yet.

Through the year
0–3 scale · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Salmon runRun
1
2
2
1
Trout seasonSeason
1
2
2
2
2
1
March BrownHatch
2
3
2
Late March BrownHatch
2
3
2
Large Brook DunHatch
2
3
2
Large StoneflyHatch
2
3
2

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Fly box · Brown Trout
SC
Small ChironomidTop
22-24 · Pattern
Upstream dry, on top
Beats · 6
Brieves · 1.3 kmSorteo
Sorteo stretch — 100 m aguas abajo de la presa de Brieves to Pasarela de Luisín.
Beat detail
Sorteo (lottery) permit required
Upstream: 100 m aguas abajo de la presa de Brieves
Downstream: Pasarela de Luisín
Brieves beat map
Trevías · 0.8 kmSorteo
Sorteo stretch — Pasarela de Luisín to Cola del pozo de la Morena.
Beat detail
Sorteo (lottery) permit required
Upstream: Pasarela de Luisín
Downstream: Cola del pozo de la Morena
Trevías beat map
Cortina · 2.2 kmFree Tue/Wed/Sat
Free Tue/Wed/Sat stretch — 25 m aguas arriba de la cabecera del pozo el Campón to Banzao de Villar.
Beat detail
Free on Tue/Wed/Sat, sorteo on other days
Upstream: 25 m aguas arriba de la cabecera del pozo el Campón
Downstream: Banzao de Villar
Cortina beat map
Chamberí · 1.8 kmSorteo
Sorteo stretch — Banzao de Villar to Puente de Chamberí.
Beat detail
Sorteo (lottery) permit required
Upstream: Banzao de Villar
Downstream: Puente de Chamberí
Chamberí beat map
Piedra Blanca · 1.5 kmSorteo
Sorteo stretch — 50 m aguas abajo de la presa de Casielles to Puente de Canero.
Beat detail
Sorteo (lottery) permit required
Upstream: 50 m aguas abajo de la presa de Casielles
Downstream: Puente de Canero
Piedra Blanca beat map
Agüera · 1.8 kmTrout permit
Trout permit stretch — 50 m aguas abajo del Banzao de Electra del Esva to 50 m aguas abajo Puente Bustiello.
Beat detail
Daily permit required, keep within bag limits
Upstream: 50 m aguas abajo del Banzao de Electra del Esva
Downstream: 50 m aguas abajo Puente Bustiello
Agüera 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
Río Negro
12 km
71
Brown trout · Sea trout
Río Navelgas
13 km
76
Brown trout
Río Nonaya
17 km
72
Brown trout
Río Narcea
21 km
72
Brown trout · Salmon · Sea trout
Río Pigüeña
21 km
82
Brown trout · Sea trout
Gallery · 5
  1. The Río Esva flowing through riparian woodland in the Hoces del Esva gorge, Asturias.
    Río Esva in the Hoces gorge
  2. The Río Esva flowing past the village of Agüera in the Valle de Paredes, Asturias.
    Río Esva at Agüera
  3. A wooden footbridge crossing the Río Esva amid dense riparian woodland in the Hoces gorge.
    Footbridge over the Río Esva
  4. Remains of an ancient stone weir across the Río Esva in the Hoces gorge, Asturias.
    Old weir on the Río Esva
  5. Terrain map of the venue
    Terrain map
Water quality (WFD)
  • Ecology: Good
  • Chemical: Unknown

WFD classification · ES018MSPFES200MAR001770

The full read · show the working · for Brown Trout · confidence 75%
How the 71 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow40 × 22%8.8
Clarity95 × 18%17.1
Feeding Time55 × 13%7.2
Pressure80 × 7%5.6
Insect activity37 × 12%4.4
Conditions total= 71
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout Tercer Sunday de March → 15 August
4 zones — different rules apply
  • Coto salmonero

    Main Esva salmon beats: Brieves, Trevías, Chamberí, Piedra Blanca (all salmonero tradicional)

    • Salmon: Tercer Saturday de April → 15 July · 1 per day, 1 per season (kill limit)
    • Sea trout: follows Trout
    • Trout: Tercer Sunday de May → 15 August
  • Coto parcial

    Cortina coto parcial — middle Esva

    • Salmon: Tercer Saturday de April → 15 July · 1 per day, 1 per season (kill limit)
    • Sea trout: follows Trout
    • Trout: Tercer Sunday de March → 15 August
  • Coto truchero

    Esva trout cotos: Agüera, La Central, Paredes, Restiello, La Chanona — upper/middle Esva

    • Sea trout: follows Trout
    • Trout: Tercer Sunday de March → 15 August
  • Zona libre

    Non-coto stretches of the Esva — free-access trout water

    • Sea trout: follows Trout
    • Trout: Tercer Sunday de March → 15 August

Sea trout: Variable seasonal (2026) — Western Asturias spate river — reo and salmon on a clean granite-peat system. Sea trout present from June on rising water. Short response time after rain, brief windows. Night fishing restricted per Asturian regional schedule.

Salmon: Heritage only (2026) — Heritage Asturian salmon river — small slate-and-pasture western Asturian river that has historically held salmon but is no longer a viable salmon fishing destination. Listed as 'historic'. Brown trout fishing remains the primary proposition; sea trout interest is modest.

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