Upland Natural Lake · Sandstone · Powys / Brecon Beacons

Llyn Cwm Llwch

Llyn Cwm Llwch venue image
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Glacial corrie llyn in the Brecon Beacons below Corn Du.

Good · Trout
Diawl Bach · 12-14
Goodlive now
Buzzer on Llyn Cwm Llwch
Good wave on — drift country. Drift fishing weather — three flies on a long leader.
67% confidence
What moved it
  • WindSW 22 km/hModerate breeze
Today’s fly
Diawl Bach
Diawl Bach12-14
Washing-line, sub-surface
Conditions on the water
Live gauge
Wind
Moderate breeze
SW 22 km/h
N
SW
from the south-west
Wave40 cm chop
Water temp
Air temp14°C
CloudOvercast
Pressure1020 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for trout
When
June to August
Where
Set up a broadside drift and cover the water systematically. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point.
The plan
Plan A

Set up a broadside drift and cover the water systematically. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point.

Plan B

If the main plan is not working, switch to a smaller, more imitative pattern fished slower and deeper. A change of drift angle can also make a difference.

Watch for

Watch for Sedge towards evening — this could be the best window of the day.

Boat — drift

A gentle ripple is ideal for drifting — broadside drift covering the wind lanes should be productive.

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
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
What's coming
Plan ahead
5-day outlook
Condition match
65%
Cloud70%
Wind65%
Temp60%

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

Other water nearby · 5
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

Glacial corrie llyn in the Brecon Beacons below Corn Du. Wild brown trout in dramatic mountain scenery. Access by 2-mile walk from Storey Arms. Classic Beacons hill llyn — small, wild fish in clear water. Traditional wet flies and dabblers.

  • Lake
  • Sandstone
Why this score
  • Buzzer is in its seasonal window, boosting the chance of targeted feeding.
Directions
Seasons & zones
  • Trout3 March → 30 September
Related guides
Booking & contacts