Stillwater · Silurian Mudstone Shale · Wales / Cambrian Mountains (Elan Valley uplands, Rhayader)

Llynoedd Cerrig Llwyddion

A remote upland lake seen from a rocky, grassy hilltop, with open moorland stretching to the horizon under a partly cloudy sky.

Cerrig Llwyddion is really two lakes for the price of one ticket — an upper pool that holds a sparse scattering of small wild browns, more a curiosity than a destination, and a lower lake with rather better sport, brown trout running up to a pound for anyone patient enough to work it properly.

Fair · Trout
Minkie · 6-10
Fairlive now
Good drifting conditions on Llynoedd Cerrig Llwyddion
Useful ripple, fishable wave. Worth a session if the wind holds.
55% confidence

Llynoedd Cerrig Llwyddion is often best in spring through autumn.

What moved it
  • WindN 23 km/hModerate breeze · Gusts to 40 km/h
Today's fly
Minkie
Minkie6-10
Retrieve, sub-surface
Conditions on the water
Estimate
Wind
Moderate breeze · Gusts to 40 km/h
N 23 km/h
N
N
from the north
Wave40 cm chop
Water temp8.5°C
Air temp10°C
CloudBroken
Pressure1017 hPa
Rain · recent0.0 mm

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

Head to
Wind driftN wind
Southern end

A northerly has held for 9 hours at much the same temperature as the 9°C water. No thermal steer either way, but the drift still stacks food against the southern end — the bank it is blowing into — so start there. This reads the upper water, though — a bottom bait at range feels it far less than a floater or a fish in the margins. Treat it as a tiebreaker between good swims rather than an override — features and angling pressure usually count for more.

How to fish it · for Trout
When
Late April–June; evening rises through summer
Where
Work a bushy searching pattern on the bob and drop a contrasting nymph on the point.
The plan
Plan A

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

Keep an eye on changing conditions — wind shifts and cloud breaks can trigger short feeding spells.

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 as a supporter.

Start free trial

14-day free trial. Cancel anytime.

Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 5 as a supporter.

Start free trial

14-day free trial. Cancel anytime.

Through the year
0–3 scale · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Heather FlyHatch
2
2
Daddy Long LegsHatch
2
3
2
Claret DunHatch
2
3
2
Murrough (Great Red Sedge)Hatch
2
3
2

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Trout fly box
Bays & launches · 1
Day ticket via Rhayader and Elan Valley AA (covers Claerwen)Access varies
Two small remote lakes above the Elan valley — sparse upper pool, better lower lake with browns to 1lb.
Visit official site ↗
What's coming
Plan ahead
5-day outlook
Condition match
63%
Cloud70%
Wind30%
Temp100%

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

Other water nearby · 5
Gallery · 2
  1. A remote upland lake seen from a rocky, grassy hilltop, with open moorland stretching to the horizon under a partly cloudy sky.
    Llyn Cerrigllwydion Uchaf from Cnapyn Blaendrawsffos
  2. Terrain map of the venue
    Terrain map
About this water

Cerrig Llwyddion is really two lakes for the price of one ticket — an upper pool that holds a sparse scattering of small wild browns, more a curiosity than a destination, and a lower lake with rather better sport, brown trout running up to a pound for anyone patient enough to work it properly. Both come under the same Claerwen-inclusive permit as the rest of the Rhayader club's upland water. The sensible plan is to treat the upper as a look-and-learn stop on the walk in and spend your actual fishing time on the lower. Remote, quiet, and entirely without pretension — which describes most of this stretch of moor rather well.

  • Lake
  • Silurian mudstone shale
Why this score
  • Wind conditions (windy) are not ideal for this water.
  • Temperature (cool) is in the sweet spot for autumn fishing.
  • Buzzer is in its seasonal window, boosting the chance of targeted feeding.
Related guides
Casting instructors near here
Booking & contacts
Boards & regulators