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

Beacons Reservoir

Beacons Reservoir venue image
Fair · Rainbow
Diawl Bach · 12-14
Fairlive now
Reasonable summer fishing likely at Beacons Reservoir
Good wave on — drift country. A useful wave. Work the productive shore.
55% confidence

Beacons Reservoir is often best in spring through autumn.

What moved it
  • WindSE 7 km/hLight breeze
Today's fly
Diawl Bach
Diawl Bach12-14
Washing-line, sub-surface
Conditions on the water
Live gauge
Wind
Light breeze
SE 7 km/h
N
SE
from the south-east
WaveRipple
Water temp—
Air temp20°C
CloudClear
Pressure1021 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for Rainbow
When
Conditions are not ideal but fishable at Beacons Reservoir. The ripple should help fish move and feed more confidently. Early morning is often the most productive window in summer — make the most of it.
Where
Start with Marabou Damsel (8-12) — on the point. Evening can produce explosive surface takes — try a foam beetle or booby on a long leader. Rainbows respond to more active retrieves — try short strips between pauses.
The plan
Plan A

Start with Marabou Damsel (8-12) — on the point. Evening can produce explosive surface takes — try a foam beetle or booby on a long leader. Rainbows respond to more active retrieves — try short strips between pauses.

Plan B

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

Watch for

Sedge should come on through the afternoon as the water warms.

Bank

Bank-only venue. Fish from accessible margins, points, weed edges, and inflows.

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

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
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
Rainbow 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
66%
Cloud25%
Wind100%
Temp60%

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

Other water nearby · 5
Llyn Cwm Llwch
4.0 km
Brown trout
Llwyn-on Reservoir
7.0 km
Brown trout · Rainbow trout
Talybont Reservoir
11 km
Brown trout
Afon Cynon
16 km
Brown trout
Llyn y Fan Fach
19 km
Brown trout
Gallery · 1
  1. Terrain map of the venue
    Terrain map
Why this score
  • Wind conditions (ripple) closely match what this water fishes best in.
  • Buzzer is in its seasonal window, boosting the chance of targeted feeding.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 20 March → 12 October
Related guides
Scotland Playbookloch & river fishingThermal Layers & Troutreading depth and temperatureEuro Nymphingsubsurface methods
Casting instructors near here
Booking & contacts