Stillwater · Sandstone · Mid Wales, GB-WLS

Brynhenllys Fishery

Brynhenllys Fishery terrain map

Brynhenllys is a Mid Wales stocked fishery sitting on sandstone, the kind of honest little water that asks nothing of you but a few hours and a bit of patience.

Fair · Trout
Daddy Long Legs · 10-12
Fairlive now
Reasonable autumn fishing likely at Brynhenllys Fishery
Useful ripple, fishable wave. Worth a session if the wind holds.
50% confidence

Brynhenllys Fishery is often best in spring through autumn.

What moved it
  • WindW 20 km/hGentle breeze
Today's fly
Daddy Long Legs
Daddy Long Legs10-12
Upstream dry, on top
Conditions on the water
Estimate
Wind
Gentle breeze
W 20 km/h
N
W
from the west
Wave40 cm chop
Water temp13.1°C
Air temp15°C
CloudBroken
Pressure1011 hPa
Rain · recent0.0 mm

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

How to fish it · for Trout
When
Cloudy or lightly breezy days, cool to moderate water; spring and autumn the steadiest, with buzzer activity through the warmer months.
Where
Start with Daddy Long Legs (10-12) 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 Daddy Long Legs (10-12) on a As per local method. If that does not produce, switch depth or speed before changing the pattern entirely.

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.

Bank

Bank fishing near inflows, dam walls, and weed beds. Move to find feeding fish.

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 5 as a supporter.

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Through the year
0–3 scale · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Reservoir BuzzerHatch
2
3
3
3
3
3
2
Daphnia SwarmHatch
2
3
3
3
2
Lake OliveHatch
2
3
3
3
3
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

Traditional wild-trout llyn fishing. Wet flies and dabblers stay central, with buzzer, caddis, terrestrials and occasional small fry patterns becoming important as the season warms.

BU
Bumble
10-12 · Pattern
Fish it in the film
What's coming
Plan ahead
5-day outlook
Condition match
74%
Cloud100%
Wind65%
Temp60%

A good match for Brynhenllys Fishery — most conditions are close to what it fishes best in.

Fishing better nearby · 5
Afon Twrch
3.0 km
86
Brown trout
Llyn y Fan Fach
10 km
Brown trout
Usk Reservoir
17 km
Brown trout · Rainbow trout
Paper Mill Fishery
22 km
Brown trout · Rainbow trout
Beacons Reservoir
23 km
Brown trout · Rainbow trout
About this water

Brynhenllys is a Mid Wales stocked fishery sitting on sandstone, the kind of honest little water that asks nothing of you but a few hours and a bit of patience. There's no mystique here and that's rather the point. The trout are stocked and willing, but willing isn't the same as foolish, and on a bright still day they'll sulk in the depths and make you work for it. Come on a grey afternoon with a breeze putting a ripple on the surface and the whole place opens up. It fishes best cool, which suits the Welsh weather, since cool is mostly what's on offer. A reliable place to relearn that catching fish is only part of why you came.

  • Fishery
  • Sandstone
Why this score
  • Cloud cover (cloud) suits the fishery well.
Related guides
Small Stillwater Playbookstillwater tacticsThermal Layers & Troutreading depth and temperatureEuro Nymphingsubsurface methods
Casting instructors near here
Booking & contacts
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Boards & regulators