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

Llyn yr Adar

A calm upland lake surrounded by grassy moorland with rocky outcrops, with the mountains of Snowdonia including Snowdon visible under a partly cloudy sky.

Yr Adar sits up under Cnicht with Conglog and Cwm Foel for company, another of the high, remote waters that make you work before you fish.

Fair · Trout
Minkie · 6-10
Fairlive now
Good drifting conditions on Llyn yr Adar
Good wave on — drift country. A useful wave. Work the productive shore.
55% confidence

Llyn yr Adar is often best in spring through autumn.

What moved it
  • WindSW 11 km/hLight breeze · Gusts to 22 km/h
Today's fly
Minkie
Minkie6-10
Retrieve, sub-surface
Conditions on the water
Estimate
Wind
Light breeze · Gusts to 22 km/h
SW 11 km/h
N
SW
from the south-west
Wave20 cm ripple
Water temp9.6°C
Air temp13°C
CloudOvercast
Pressure1018 hPa
Rain · recent0.0 mm

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

Head to
Wind driftSW wind
North-eastern end

A southwesterly has held for two days, running warmer than the water (12°C air against 10°C water). Expect fish at the north-eastern end — the bank it is blowing into — where the drift piles food, colour and warmth together. 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

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
Trout fly box
Bays & launches · 1
Day ticket via Cambrian Angling AssociationAccess varies
Remote high llyn below Cnicht holding wild brown trout only; 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 yr Adar — most conditions are close to what it fishes best in.

Other water nearby · 5
Llyn Cwm Corsiog
1.0 km
Brown trout
Llyn Cwm Foel
1.0 km
Brown trout
Llyn Llagi
1.0 km
Brown trout
Llynoedd Cwn
1.0 km
Brown trout
Llyn Conglog
2.0 km
Brown trout
Gallery · 2
  1. A calm upland lake surrounded by grassy moorland with rocky outcrops, with the mountains of Snowdonia including Snowdon visible under a partly cloudy sky.
    Llyn yr Adar and Snowdon
  2. Terrain map of the venue
    Terrain map
About this water

Yr Adar sits up under Cnicht with Conglog and Cwm Foel for company, another of the high, remote waters that make you work before you fish. It holds wild brown trout only, small and unstocked, in water that colours and clears with the weather rather than any human intervention. This is the end of the portfolio for anyone doing the llyns as a tour rather than picking off single waters — pair it with a couple of the nearby high lakes on a long day rather than making the walk for this one alone. The reward is as much the ground covered as the fish that come to hand.

  • 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.
Related guides
Scotland Playbookloch & river fishingThermal Layers & Troutreading depth and temperatureEuro Nymphingsubsurface methods
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