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.

Marginal · Trout
Marabou Damsel · 8-12
A patient day, if you fancy it
Good wave on — drift country. Slow going — pick your moments and do not force it.
44% confidence
limited data

Llyn Syfydrin is often best in spring through autumn.

What moved it
  • WindW 13 km/hGentle breeze
Today's fly
Marabou Damsel
Marabou Damsel8-12
Retrieve, sub-surface
Conditions on the water
Live gauge
Wind
Gentle breeze
W 13 km/h
N
W
from the west
Wave20 cm ripple
Water temp
Air temp21°C
CloudOvercast
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.

Bank

Bank-only venue. Fish from accessible margins, points, weed edges, and inflows.

Sub-surface · on the nymphunder the surface

Hatch predictions

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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
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
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.
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What's coming
Plan ahead
5-day outlook
Condition match
59%
Cloud50%
Wind65%
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
  • Daddy Longlegs are in their seasonal window, boosting the chance of targeted feeding.
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