Stillwater · Ordovician Volcanics Sediment · Wales / Snowdonia (Carneddau), GB-WLS

Llyn Eigiau

Llyn Eigiau venue image

Eigiau is the famous one for the wrong reasons — the dam burst in 1925, killed sixteen people in Dolgarrog below, and a hundred years on the lake remains shallow and broad rather than the deep impoundment it used to be.

Fair · Trout
Minkie · 6-10
Fairlive now
Buzzer expected on Llyn Eigiau
Useful ripple, fishable wave. Worth a session if the wind holds.
59% confidence

Llyn Eigiau is often best in spring through autumn.

What moved it
  • WindSW 26 km/hModerate breeze
Today's fly
Minkie
Minkie6-10
Retrieve, sub-surface
Conditions on the water
Estimate
Wind
Moderate breeze
SW 26 km/h
N
SW
from the south-west
Wave60 cm wave
Water temp12.8°C
Air temp15°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 driftSW wind
North-eastern end

A south-westerly has held for 15 hours at much the same temperature as the 13°C water. No thermal steer either way, but the drift still stacks food against the north-eastern 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
The buzzer is on. Sedge may also come into play as the day warms. The breeze will be blowing terrestrial insects onto the water — check the wind lanes and downwind margins for rising fish.
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 3 guilds with Pro.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 5 with Pro.

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Through the year
0–3 scale · September 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 Fishing PassportAccess varies
120-acre Carneddau lake — wild brown trout plus relict Arctic char.
Visit official site ↗
What's coming
Plan ahead
5-day outlook
Condition match
57%
Cloud50%
Wind30%
Temp100%

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

Other water nearby · 5
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

Eigiau is the famous one for the wrong reasons — the dam burst in 1925, killed sixteen people in Dolgarrog below, and a hundred years on the lake remains shallow and broad rather than the deep impoundment it used to be. Forty-nine hectares of wild brown trout in shadow of Pen Llithrig y Wrach, plus a small relict Arctic char population (transferred from Llyn Peris before the burst). Roughly a mile and a quarter's walk in. Bank only, two-fish limit.

  • Lake
  • Ordovician volcanics sediment
Why this score
  • Wind conditions (windy) are not ideal for this water.
  • Temperature (cool) is in the sweet spot for autumn fishing.
  • Buzzer is in its seasonal window, boosting the chance of targeted feeding.
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