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

Embalse de Alsa

Embalse de Alsa venue image
Fair · Trout
Griffith's Gnat · 18-22
Fairlive now
Reasonable summer fishing likely at Embalse de Alsa
Good wave on — drift country. A useful wave. Work the productive shore.
56% confidence

Peak season here starts around September — worth planning ahead.

What moved it
  • WindS 16 km/hGentle breeze
Today's fly
Griffith's Gnat
Griffith's Gnat18-22
Upstream dry, on top
Conditions on the water
Estimate
Wind
Gentle breeze
S 16 km/h
N
S
from the south
Wave20 cm ripple
Water temp18.7°C
Air temp18°C
CloudClear
Pressure1019 hPa
Rain · recent0.0 mm

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

Reservoir levelas of 24 Aug
93% 10-yr norm
Filling
91% full
High & filling
-2 ptsvs seasonal norm
0 ptsvs last year
+5 ptsthis week
High and still filling — new water inundating margins, surface fishing improves dramatically.
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. Early in the day, nymphs and buzzers fished slowly tend to outperform attractors.
The plan
Plan A

Start with CDC F-Fly (Black) (18-22) on a As per local method. Early in the day, nymphs and buzzers fished slowly tend to outperform attractors.

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

Top nymph shown — see all 2 guilds with Pro.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 5 with Pro.

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Through the year
0–3 scale · August 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
52%
Cloud25%
Wind65%
Temp60%

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

Other water nearby · 5
Gallery · 1
  1. Terrain map of the venue
    Terrain map
Why this score
  • summer conditions with clear skies and breezy wind.
  • High and still filling — new water inundating margins, surface fishing improves dramatically.
Related guides
Booking & contacts