Spate · Slate · Asturias, Spain

Río Esva (Canero system)

The Río Esva flowing through riparian woodland in the Hoces del Esva gorge, Asturias.
Poor · Sea Trout
Black & Silver Tube · 1-2 inch
Closed season
Out of season. File this water for the right month.
Closed — confidence not applicable today.
What moved it
  • Level0.58 mLast reading 59 min ago
  • Water temp14.8°C
  • ClarityClear
Today's fly
BS
Black & Silver Tube1-2 inch
In deep pools and dark water, silhouette and contrast do the work colour cannot. A fly that reads as black against depth is enough. Fish it broadside, hold the swing, let it hang at the dangle — that is when the best fish take.
Conditions on the water
Live gauge
Level
Steady
0.58 m
lowspate
Water temp14.8°C
ClarityClear
Weather14°C
WindSW 20 km/h
Pressure1018 hPa
Rain · recent12.2 mm
Rain · ahead2.4 mm

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

Water temperature for Sea Trout
Ideal
15°C est.ideal 8–15°C
0°14°28°
How to fish it · for Sea Trout
When
From dusk into the first half of the night.
Where
Deeper pools and slower glides · hold water and current seams.
Method
Fish dark patterns on a sink-tip or lightly sunk line, especially near structure.
Kit
10 ft #6/7 rod, floating line with a sink-tip option, 8–10 lb fluoro tippet for the swing.
Hatch timeline · todayPeak at 6am

Hatch predictions

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Sub-surface · on the nymphunder the surface

Hatch predictions

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Beyond the hatch · worth watchingambient prey(1)

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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 · August 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
Sea Trout fly box
BS
Black & Silver TubeTop
1-2 inch · Tube
In deep pools and dark water, silhouette and contrast do the work colour cannot. A fly that reads as black against depth is enough. Fish it broadside, hold the swing, let it hang at the dangle — that is when the best fish take.
SF
Snake Fly (Black)
2-4 inch · Streamer
A mobile eel-like profile that undulates through deep pools — effective when sea trout are lying deep and not responding to conventional wets.
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.
  • 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
Río Negro
12 km
Brown trout · Sea trout
Río Navelgas
13 km
Brown trout
Río Narcea
21 km
Brown trout · Salmon · Sea trout
Río Pigüeña
21 km
Brown trout · Sea trout
Río Nonaya
21 km
Brown 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

Why this score · for Sea Trout
  • Temperature10028% weight
  • Flow4022% weight
  • Clarity8518% weight
  • Feeding Time8013% weight
  • Pressure857% weight
  • Insect activity4312% weight
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout Third Sunday of March → 15 August
4 zones — different rules apply
  • Coto salmonero

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

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

    Cortina coto parcial — middle Esva

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

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

    • Sea trout: follows Trout
    • Trout: Third Sunday of March → 15 August
  • Zona libre

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

    • Sea trout: follows Trout
    • Trout: Third Sunday of 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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