Upland Natural Lake · Sandstone · Powys / Brecon Beacons, GB-WLS

Llyn Cwm Llwch

Llyn Cwm Llwch
Fair · Trout
Cat's Whisker · 8-12
Fairlive now
Good drifting conditions on Llyn Cwm Llwch
Useful ripple, fishable wave. Worth a session if the wind holds.
59% confidence
What moved it
  • WindS 23 km/hModerate breeze
Today's fly
Cat's Whisker
Cat's Whisker8-12
Retrieve, sub-surface
Conditions on the water
Estimate
Wind
Moderate breeze
S 23 km/h
N
S
from the south
Wave40 cm chop
Water temp14.9°C
Air temp14°C
CloudOvercast
Pressure1004 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
June to August
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 4 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 · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
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
Fly box · Trout
What's coming
Plan ahead
5-day outlook
Condition match
51%
Cloud70%
Wind30%
Temp60%

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

Other water nearby · 5
Gallery · 2
  1. Llyn Cwm Llwch
  2. Terrain map of the venue
    Terrain map
Why this score
  • Wind conditions (windy) are not ideal for this water.
  • Daddy Longlegs are in their seasonal window, boosting the chance of targeted feeding.
Directions
Seasons & zones
  • Trout 3 March → 30 September
Related guides
Casting instructors near here
Booking & contacts