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

Embalse de Alsa

Embalse de Alsa venue image
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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
Foam Beetle · 14-18
Fairlive now
Good summer conditions for Embalse de Alsa
Good wave on — drift country. A useful wave. Work the productive shore.
58% confidence
What moved it
  • WindN 9 km/hLight breeze
Today’s fly
Foam Beetle
Foam Beetle14-18
Proven pattern for this period
Conditions on the water
Live gauge
Wind
Light breeze
N 9 km/h
N
N
from the north
WaveRipple
Water temp
Air temp17°C
CloudOvercast
Pressure1019 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

Reservoir levelas of 13 Jul
91% 10-yr norm
Dropping
96% full
High & steady
+5 ptsvs seasonal norm
-4 ptsvs last year
-4 ptsthis week
Reservoir near full — settled fish across plenty of holding water.
How to fish it · for trout
When
Spring through summer; the bigger fish often come early and late in the day.
Where
Start with CDC F-Fly (Black) (18-22) on a As per local method. If that does not produce, switch depth or speed before changing the pattern entirely.
The plan
Plan A

Start with CDC F-Fly (Black) (18-22) on a As per local method. If that does not produce, switch depth or speed before changing the pattern entirely.

Plan B

Fish early and late, try deeper during the heat of the day with a fast-sinking line.

Watch for

Evening tends to be the best period in summer — stay late if you can for a sedge or spinner fall.

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

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Beyond the hatch · worth watchingambient prey

Hatch predictions

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Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Daddy Long LegsHatch
2
3
2
Murrough (Great Red Sedge)Hatch
1
2
1
Lake OliveHatch
1
2
2
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
85%
Cloud50%
Wind100%
Temp100%

Conditions are ideal for Embalse de Alsa — wind, cloud and temperature all line up.

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
  • Wind conditions (ripple) closely match what this water fishes best in.
  • Temperature (cool) is in the sweet spot for summer fishing.
  • Reservoir near full — settled fish across plenty of holding water.
Related guides
Booking & contacts