Stillwater · Silurian Mudstone Shale · Wales / Mid-Wales (Wye catchment, near Rhayader)

Llyn Gwyn

Llyn Gwyn, a still lowland fishing lake near Rhayader, seen across rough grassland and bracken with a lone tree on the far bank.
Fair · Trout
Minkie · 6-10
Fairlive now
Good drifting conditions on Llyn Gwyn
Good wave on — drift country. A useful wave. Work the productive shore.
63% confidence

Llyn Gwyn is often best in spring through autumn.

What moved it
  • WindN 10 km/hLight breeze
Today's fly
Minkie
Minkie6-10
Retrieve, sub-surface
Conditions on the water
Live gauge
Wind
Light breeze
N 10 km/h
N
N
from the north
Wave20 cm ripple
Water temp—
Air temp14°C
CloudBroken
Pressure1020 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for Trout
When
The daddy longlegs are on. Sedge may also come into play as the day warms. The ripple is helpful — fish should move onto the feed and a slow-drifted team or single wet will cover water well.
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

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

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 with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 5 with Pro.

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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
Trout fly box
Bays & launches · 1
Day ticket via Rhayader and Elan Valley AA — SEASONAL, closed Jul–SepAccess varies
Club-owned mixed fishery near Rhayader — stocked rainbow/blue/golden trout, wild browns and carp.
Visit official site ↗
What's coming
Plan ahead
5-day outlook
Condition match
91%
Cloud70%
Wind100%
Temp100%

Conditions are ideal for Llyn Gwyn — wind, cloud and temperature all line up.

Other water nearby · 5
Elan Valley (Rhayader)
10 km
Brown trout · Rainbow trout
Llyn Carw
16 km
Brown trout
Llynoedd Cerrig Llwyddion
18 km
Brown trout
Llyn Gynon
21 km
Brown trout
Llyn Egnant
22 km
Brown trout
Gallery · 2
  1. Llyn Gwyn, a still lowland fishing lake near Rhayader, seen across rough grassland and bracken with a lone tree on the far bank.
    Llyn Gwyn
  2. Terrain map of the venue
    Terrain map
Why this score
  • Wind conditions (ripple) closely match what this water fishes best in.
  • Temperature (cool) is in the sweet spot for summer fishing.
  • Daddy Longlegs are in their seasonal window, boosting the chance of targeted feeding.
Related guides
Small Stillwater Playbookstillwater tacticsThermal Layers & Troutreading depth and temperatureEuro Nymphingsubsurface methods
Casting instructors near here
Booking & contacts