Stillwater · Silurian Mudstone Shale · Wales / Cambrian Mountains (upper Twymyn catchment, above Llanbrynmair), GB-WLS

Llyn Gwyddior

A calm upland lake seen across open moorland, with a band of conifer forestry on the far hillside under a partly cloudy sky.
Fair · Trout
Minkie · 6-10
Fairlive now
Buzzer expected on Llyn Gwyddior
Useful ripple, fishable wave. Worth a session if the wind holds.
60% confidence

Llyn Gwyddior is often best in spring through autumn.

What moved it
  • WindNW 21 km/hModerate breeze · Gusts to 39 km/h
Today's fly
Minkie
Minkie6-10
Retrieve, sub-surface
Conditions on the water
Estimate
Wind
Moderate breeze · Gusts to 39 km/h
NW 21 km/h
N
NW
from the north-west
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.

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.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 5 as a supporter.

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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
Fly box · Trout
Bays & launches · 1
Access via Llanbrynmair Angling AssociationAccess varies
Small unstocked hill lake above Llanbrynmair, wild brown trout, fly only.
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What's coming
Plan ahead
5-day outlook
Condition match
77%
Cloud70%
Wind65%
Temp100%

A good match for Llyn Gwyddior — most conditions are close to what it fishes best in.

Other water nearby · 5
Gallery · 2
  1. A calm upland lake seen across open moorland, with a band of conifer forestry on the far hillside under a partly cloudy sky.
    Llyn Gwyddior from the west
  2. Terrain map of the venue
    Terrain map
Why this score
  • 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