Stillwater · Limestone · Asturias / Morcín–Riosa, ES

Embalse de los Alfilorios

Embalse de Alfilorios

Alfilorios is a small thing with a complicated job: it supplies Oviedo with drinking water and, since 2020, doubles as a trout coto — the sort of pragmatic arrangement Asturias does rather well.

Fair · Trout
Perdigón · 14-18
Fairlive now
Reasonable autumn fishing likely at Embalse de los Alfilorios
Good wave on — drift country. A useful wave. Work the productive shore.
56% confidence

Seasonally this is the right time to be here, but today's conditions are not doing Embalse de los Alfilorios many favours. It can still fish, but temper expectations.

What moved it
  • WindNE 14 km/hGentle breeze
Today's fly
Perdigón
Perdigón14-18
High-confidence seasonal pick
Conditions on the water
Estimate
Wind
Gentle breeze
NE 14 km/h
N
NE
from the north-east
Wave20 cm ripple
Water temp14.1°C
Air temp13°C
CloudOvercast
Pressure1027 hPa
Rain · recent0.0 mm

No gauge on this water — readings are regional estimates from weather, not a live gauge.

Reservoir levelas of 12 Oct
┄ 58% 10-yr norm
▬ Steady
38% full
Low & steady
▼-20 ptsvs seasonal norm
▬0 ptsvs last year
▬0 ptsthis week
Below seasonal norm but level steady — fish should be settled to the new shoreline.
How to fish it · for Trout
When
March to August (coto open season). Quiet weekday permits are easiest to come by.
Where
Start with Parachute Adams (14-18) on a As per local method. Early in the day, nymphs and buzzers fished slowly tend to outperform attractors.
The plan
Plan A

Start with Parachute Adams (14-18) on a As per local method. Early in the day, nymphs and buzzers fished slowly tend to outperform attractors.

Plan B

A fry-imitating pattern stripped through the margins can save a blank in autumn.

Watch for

Keep an eye on changing conditions — wind shifts and cloud breaks can trigger short feeding spells.

Either bank or boat

Good ripple suits both bank and boat. Bank: work inflows, dam walls, and points. Boat: broadside drift covering wind lanes.

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 4 as a supporter.

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Through the year
0–3 scale · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Mayfly (Green Drake)Hatch
2
2
Daddy Long LegsHatch
2
3
2
DuckflyHatch
2
2
Silverhorns & LonghornsHatch
2
3
3
3
2

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

Ranked for today
Trout fly box
Permits & access
Permit required — see local rules.
  • Asturias licence + Alfilorios coto permit required
  • Bank only — no boats (drinking-water reservoir)
  • Limited to 3 anglers/day and 3 trout/angler/day; sin muerte once the cup is reached
  • Stocked with adult native brown trout.
What's coming
Plan ahead
5-day outlook
Condition match
59%
Cloud50%
Wind65%
Temp60%

A reasonable day here, though cloud isn't quite in the sweet spot.

Fishing better nearby · 5
Gallery · 2
  1. Embalse de Alfilorios
  2. Terrain map of the venue
    Terrain map
About this water

Alfilorios is a small thing with a complicated job: it supplies Oviedo with drinking water and, since 2020, doubles as a trout coto — the sort of pragmatic arrangement Asturias does rather well. The fishing nearly didn't survive. The original stock wore thin faster than anyone had budgeted for, and the answer was to put back adult native brown trout, fish too old for the rivers, to keep the place ticking over. It is bank fishing only, three rods a day and three fish, so you fish it slowly and you fish it properly. Nymph the margins, watch for an evening rise, and don't expect a crowd. For a reservoir that exists to fill taps, it fishes with surprising charm.

  • Reservoir
  • Limestone
Why this score
  • autumn conditions with overcast skies and breezy wind.
  • Below seasonal norm but level steady — fish should be settled to the new shoreline.
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