Stillwater · Sandstone · Carmarthenshire

Llandyfan Trout Fishery

Llandyfan Trout Fishery terrain map

Llandyfan sits on sandstone in Carmarthenshire, a stocked fishery for rainbows and browns, and like most good small waters it rewards the angler who reads the day rather than barges in flogging the water.

Fair · Rainbow
Coch-y-Bonddu Beetle · 10-14
Fairlive now
Reasonable summer fishing likely at Llandyfan Trout Fishery
Water temperature is the limiting factor today, not the wave. Fish dawn or dusk if you go at all, and handle everything with extra care.
56% confidence

Llandyfan Trout Fishery is often best in spring through autumn.

What moved it
  • WindW 9 km/hLight breeze
Today's fly
CY
Coch-y-Bonddu Beetle10-14
Upstream dry, on top
Conditions on the water
Live gauge
Wind
Light breeze
W 9 km/h
N
W
from the west
WaveRipple
Water temp—
Air temp26°C
CloudOvercast
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 Llandyfan Trout Fishery. The ripple should help fish move and feed more confidently. Very warm conditions — trout have a narrower safe zone of cool, oxygen-rich water. Fish only at first light or last light, use barbless hooks, keep fish in the water during release, and stop if fish struggle to recover.
Where
Start with Coch-y-Bonddu Beetle (10-14) — on the bob / top dropper. 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 Coch-y-Bonddu Beetle (10-14) — on the bob / top dropper. 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

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

Bank

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

Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 3 with Pro.

Start free trial

14-day free trial. Cancel anytime.

Through the year
0–3 scale · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Daphnia SwarmHatch
2
3
3
3
2
Daddy Long LegsHatch
2
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
Rainbow 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.

What's coming
Plan ahead
5-day outlook
Condition match
63%
Cloud50%
Wind100%
Temp25%

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

Other water nearby · 5
Springwater Lakes
13 km
Brown trout · Rainbow trout
Usk Reservoir
15 km
Brown trout · Rainbow trout
Llyn y Fan Fach
16 km
Brown trout
Afon Twrch
22 km
Brown trout
Llyn Brianne
22 km
Rainbow trout · Brown trout
About this water

Llandyfan sits on sandstone in Carmarthenshire, a stocked fishery for rainbows and browns, and like most good small waters it rewards the angler who reads the day rather than barges in flogging the water. Sandstone country gives reasonably buffered water with a steadier temperature than the high acid lakes, which means the trout feed across a wider range of conditions and the season runs long. It's the kind of place you can drop into for a few hours and expect honest sport — buzzers in the cool, damsels and dries as it warms, a small lure for the bright days when the fish drop deep. The browns will test you more than the rainbows, as browns always do. A cloudy day with a ripple is the one to wish for.

  • Fishery
  • Sandstone
Why this score
  • Wind conditions (ripple) closely match what this water fishes best in.
Related guides
Small Stillwater Playbookstillwater tacticsThermal Layers & Troutreading depth and temperatureEuro Nymphingsubsurface methods
Casting instructors near here
Booking & contacts