Stillwater · Ordovician Volcanics · Wales / Snowdonia (Blaenau Ffestiniog uplands), GB-WLS

Llyn Conglog

Still upland lake (Llyn Conglog) reflecting a cloudy sky, with grassy moorland banks and a mountain in the distance, Snowdonia.

Conglog sits high and alone in the moorland above Blaenau Ffestiniog, the kind of water you earn with a proper walk before you ever wet a line.

Fair · Trout
Minkie · 6-10
Fairlive now
Buzzer expected on Llyn Conglog
Good wave on — drift country. A useful wave. Work the productive shore.
60% confidence

Llyn Conglog is often best in spring through autumn.

What moved it
  • WindW 9 km/hLight breeze · Gusts to 18 km/h
Today's fly
Minkie
Minkie6-10
Retrieve, sub-surface
Conditions on the water
Estimate
Wind
Light breeze · Gusts to 18 km/h
W 9 km/h
N
W
from the west
WaveRipple
Water temp9.3°C
Air temp13°C
CloudOvercast
Pressure1017 hPa
Rain · recent0.0 mm

No gauge on this water — readings are regional estimates from weather, not a live gauge.

Head to
Wind driftNE wind
South-western end

A northeasterly has held for 7 hours at much the same temperature as the 9°C water. No thermal steer either way, but the drift still stacks food against the south-western end — the bank it is blowing into — so start there. This reads the upper water, though — a bottom bait at range feels it far less than a floater or a fish in the margins. Treat it as a tiebreaker between good swims rather than an override — features and angling pressure usually count for more.

How to fish it · for Trout
When
June–August; best on overcast, breezy days
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

Watch for Sedge towards evening — this could be the best window of the day.

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
Trout fly box
Bays & launches · 1
Day ticket via Cambrian Angling AssociationAccess varies
Remote wild brown trout llyn high above Blaenau Ffestiniog, reached on foot; covered by the Cambrian AA's single day ticket across the whole llyn portfolio.
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What's coming
Plan ahead
5-day outlook
Condition match
73%
Cloud50%
Wind100%
Temp60%

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

Other water nearby · 5
Gallery · 2
  1. Still upland lake (Llyn Conglog) reflecting a cloudy sky, with grassy moorland banks and a mountain in the distance, Snowdonia.
    Llyn Conglog
  2. Terrain map of the venue
    Terrain map
About this water

Conglog sits high and alone in the moorland above Blaenau Ffestiniog, the kind of water you earn with a proper walk before you ever wet a line. Eight-odd acres of dark upland water holding a modest population of wild brown trout that have never seen a stocking truck and don't much care for a bright afternoon. Bring a spare fly box and low expectations on the weather — cloud cover and a ripple make the difference between a slow afternoon and a good one. It's not a lake that rewards impatience, but the ones that come out are entirely your own, in the honest sense that matters up here.

  • Lake
  • Ordovician volcanics
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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