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

Llyn Llagi

Dark mountain lake (Llyn Llagi) in Snowdonia backed by a steep rocky crag.

Llagi sits shallow and exposed beneath the crags below Cnicht, a modest loch that looks more dramatic than it fishes — which isn't a complaint, just an honest description.

Good · Trout
Minkie · 6-10
Goodlive now
Good drifting conditions on Llyn Llagi
Good wave on — drift country. Drift fishing weather — three flies on a long leader.
66% confidence

Llyn Llagi is often best in spring through autumn.

What moved it
  • WindNW 13 km/hGentle breeze
Today's fly
Minkie
Minkie6-10
Retrieve, sub-surface
Conditions on the water
Estimate
Wind
Gentle breeze
NW 13 km/h
N
NW
from the north-west
Wave20 cm ripple
Water temp
Air temp14°C
CloudClear
Pressure1024 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

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

Top nymph shown — see all 4 guilds with Pro.

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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
Small, shallow loch below the crags near Cnicht, holding a plentiful wild brown trout population; 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
64%
Cloud25%
Wind65%
Temp100%

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

Other water nearby · 5
Gallery · 2
  1. Dark mountain lake (Llyn Llagi) in Snowdonia backed by a steep rocky crag.
    The dark waters of Llyn Llagi from the west shore
  2. Terrain map of the venue
    Terrain map
About this water

Llagi sits shallow and exposed beneath the crags below Cnicht, a modest loch that looks more dramatic than it fishes — which isn't a complaint, just an honest description. The wild brown trout here are small and plentiful rather than surprising, the kind of fishing that rewards a light approach and low expectations on size. The setting does a lot of the work; you're fishing under real mountain architecture rather than moorland, and that's worth the walk on its own even before a fish shows. Go for the evening rise and the view, and let the trout be the bonus rather than the point.

  • Lake
  • Ordovician volcanics
Why this score
  • Temperature (cool) is in the sweet spot for summer fishing.
  • Daddy Longlegs are in their seasonal window, boosting the chance of targeted feeding.
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