Stillwater · Mixed · Cantabria / valle del Saja (Torina), ES

Embalse de Alsa

Embalse de Alsa venue image

Alsa is a small reservoir — a couple of square kilometres at most — tucked into the Saja country of southern Cantabria and fed, slightly confusingly, by the river Torina.

Fair · Trout
Perdigón · 14-18
Fairlive now
Reasonable autumn fishing likely at Embalse de Alsa
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 Alsa many favours. It can still fish, but temper expectations.

What moved it
  • WindN 16 km/hGentle breeze · Gusts to 23 km/h
Today's fly
Perdigón
Perdigón14-18
High-confidence seasonal pick
Conditions on the water
Estimate
Wind
Gentle breeze · Gusts to 23 km/h
N 16 km/h
N
N
from the north
Wave20 cm ripple
Water temp8.1°C
Air temp11°C
CloudOvercast
Pressure1026 hPa
Rain · recent0.0 mm

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

Head to
Wind driftN wind
Southern end

A northerly has held for 8 hours, running warmer than the water (12°C air against 8°C water). Expect fish at the southern end — the bank it is blowing into — where the drift piles food, colour and warmth together. This reads the upper water, though — a bottom bait at range feels it far less than a floater or a fish in the margins. Treat it as a tiebreaker between good swims rather than an override — features and angling pressure usually count for more.

Reservoir levelas of 12 Oct
┄ 85% 10-yr norm
▲ Filling
86% full
About normal
▲+1 ptsvs seasonal norm
▲+5 ptsvs last year
▲+5 ptsthis week
How to fish it · for Trout
When
Spring through summer; the bigger fish often come early and late in the day.
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 2 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
Claret DunHatch
2
3
2
Heather FlyHatch
2
2
Daddy Long LegsHatch
2
3
2
Silverhorns & LonghornsHatch
1
2
2
2
1

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.
  • Cantabria licence required; check the annual normativa for size limits, quotas and any seasonal closures on this reservoir
  • Atlantic salmon and barbel are also present — salmon are protected and seasonal.
What's coming
Plan ahead
5-day outlook
Condition match
71%
Cloud50%
Wind65%
Temp100%

A good match for Embalse de Alsa — most conditions are close to what it fishes best in.

Other water nearby · 5
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

Alsa is a small reservoir — a couple of square kilometres at most — tucked into the Saja country of southern Cantabria and fed, slightly confusingly, by the river Torina. Small does not mean modest. It has a quiet reputation for growing trout to a size the feeder streams never could, fish that have found a larder and made the most of it. It holds salmon and barbel as well, a reminder that the Cantabrian rivers run down to the sea not far away. You fish it from the bank, reading the drop-offs and the inflow where the cold water comes in, and you fish it patiently. It is not famous, which is rather the point — the sort of overlooked water where a good fish is a genuine surprise rather than an expectation.

  • Reservoir
  • Mixed
Why this score
  • Temperature (cool) is in the sweet spot for autumn fishing.
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