Stillwater · Old Red Sandstone · Wales / Brecon Beacons (Taff Valley)

Beacons Reservoir

Beacons Reservoir venue image

Beacons is the highest of the three Taff Valley reservoirs and the most properly wild — fifty-two acres of upland water mostly populated by wild brown trout, with a handful of large rainbows still circulating from older stockings.

Fair · Trout
Diawl Bach · 12-14
A respectable few hours, if you choose your moments
Good wave on — drift country. A useful wave. Work the productive shore.
46% confidence
limited data
What moved it
  • WindNE 15 km/hGentle breeze
Today's fly
Diawl Bach
Diawl Bach12-14
Washing-line, sub-surface
Conditions on the water
Live gauge
Wind
Gentle breeze
NE 15 km/h
N
NE
from the north-east
Wave20 cm ripple
Water temp
Air temp23°C
CloudClear
Pressure
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for Trout
When
Conditions are not ideal but fishable at Beacons Reservoir. The ripple should help fish move and feed more confidently.
Where
Start with Diawl Bach (12-14) — on the bob / top dropper. If that does not produce, switch depth or speed before changing the pattern entirely.
The plan
Plan A

Start with Diawl Bach (12-14) — on the bob / top dropper. 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.

Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 4 with Pro.

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Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
2
1
Daddy Long LegsHatch
2
3
2
Murrough (Great Red Sedge)Hatch
2
3
2
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
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
Gammarus Scud (Olive)
Gammarus Scud (Olive)
10-14 · Gammarus Scud
Washing-line, sub-surface
Bays & launches · 1
Beacons Reservoir — day ticket via Fishing PassportAccess varies
Day-ticket catch-and-release fishing for wild brown trout and a few surviving stocked rainbows on the highest of the Taff Valley reservoirs.
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
About this water

Beacons is the highest of the three Taff Valley reservoirs and the most properly wild — fifty-two acres of upland water mostly populated by wild brown trout, with a handful of large rainbows still circulating from older stockings. Fly only, which is the right rule for water like this. The reservoir opens 20 March and runs to early October. Bookable on day-ticket via the Fishing Passport — £14.50 catch-and-release, £9 juniors. The setting is what makes it: high Brecon Beacons sky, the cwm steepening behind you, and the kind of wind that decides what kind of day you'll have.

  • Reservoir
  • Old red sandstone
Why this score
  • Damsel Nymph is in its seasonal window, boosting the chance of targeted feeding.
Directions
Seasons & zones
  • Trout20 March12 October
Related guides
Booking & contacts