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
A respectable few hours, if you choose your moments
Good wave on — drift country. A useful wave. Work the productive shore.
45% confidence
limited data

Llyn Conglog is often best in spring through autumn.

What moved it
  • WindN 7 km/hLight breeze
Today's fly
Minkie
Minkie6-10
Retrieve, sub-surface
Conditions on the water
Estimate
Wind
Light breeze
N 7 km/h
N
N
from the north
WaveRipple
Water temp
Air temp8°C
CloudOvercast
Pressure1023 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
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. Keep a sedge-style dry or emerger on a short leader for the evening rise.
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. Keep a sedge-style dry or emerger on a short leader for the evening rise.

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

Sedge should come on through the afternoon as the water warms.

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
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.
Visit official site ↗
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.
  • Lake Olive is in its seasonal window, boosting the chance of targeted feeding.
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