Stillwater · Silurian Mudstone Shale · Wales / Cambrian Mountains (Plynlimon foothills)

Llyn Syfydrin

Llyn Syfydrin, a still moorland lake on the Pumlumon upland plateau in mid Wales.

Syfydrin is about a mile north of Pen Dam — ten hectares of upland water with a strong head of small, vividly marked wild brown trout.

Fair · Trout
Diawl Bach · 12-14
Fairlive now
Good drifting conditions on Llyn Syfydrin
Good wave on — drift country. A useful wave. Work the productive shore.
53% confidence
What moved it
  • WindE 6 km/hCalm
Today's fly
Diawl Bach
Diawl Bach12-14
Washing-line, sub-surface
Conditions on the water
Live gauge
Wind
Calm
E 6 km/h
N
E
from the east
WaveRipple
Water temp
Air temp12°C
CloudClear
Pressure1020 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for Trout
When
Late April–June; evening rises through summer
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.

Boat — drift

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

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 4 with Pro.

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Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
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
Gammarus Scud (Olive)
Gammarus Scud (Olive)
10-14 · Gammarus Scud
Washing-line, sub-surface
Bays & launches · 1
Day ticket via Fishing PassportAccess varies
Upland Plynlimon-foothill lake a mile north of Pen Dam — strong head of small wild brown trout.
What's coming
Plan ahead
5-day outlook
Condition match
66%
Cloud25%
Wind100%
Temp60%

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

Other water nearby · 5
Gallery · 2
  1. Llyn Syfydrin, a still moorland lake on the Pumlumon upland plateau in mid Wales.
    Llyn Syfydrin, a remote upland lake on the Pumlumon plateau, mid Wales.
  2. Terrain map of the venue
    Terrain map
About this water

Syfydrin is about a mile north of Pen Dam — ten hectares of upland water with a strong head of small, vividly marked wild brown trout. The banks are boggy away from the road end, so wear sensible boots and pick your wading. Fly, spin and worm permitted on the Aberystwyth AA ticket.

  • Lake
  • Silurian mudstone shale
Why this score
  • Wind conditions (ripple) closely match what this water fishes best in.
  • Buzzer is in its seasonal window, boosting the chance of targeted feeding.
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