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

Llyn Coedty (Coedty Reservoir)

Llyn Coedty reservoir seen from the track running towards Moel Eilio, near Dolgarrog

Coedty is the lowest of the Dolgarrog cluster — a five-hectare balance-tip hydro reservoir on the Afon Porth-llwyd below Llyn Eigiau, holding wild brown trout.

Fair · Trout
Minkie · 6-10
Fairlive now
Reasonable autumn fishing likely at Llyn Coedty (Coedty Reservoir)
Good wave on — drift country. A useful wave. Work the productive shore.
58% confidence

Llyn Coedty (Coedty Reservoir) is often best in spring through autumn.

What moved it
  • WindS 17 km/hGentle breeze
Today's fly
Minkie
Minkie6-10
Retrieve, sub-surface
Conditions on the water
Estimate
Wind
Gentle breeze
S 17 km/h
N
S
from the south
Wave20 cm ripple
Water temp11.9°C
Air temp13°C
CloudOvercast
Pressure1016 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
Late April–June; evening rises through summer
Where
Start with Minkie (6-10) — on the point. If that does not produce, switch depth or speed before changing the pattern entirely.
The plan
Plan A

Start with Minkie (6-10) — on the point. If that does not produce, switch depth or speed before changing the pattern entirely.

Plan B

If the main plan stalls, drop to a size 14–16 midge — switch to a washing-line or suspender rig and change drift line before you change food group.

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
12-acre balance-tip hydro reservoir below Llyn Eigiau — wild brown trout.
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What's coming
Plan ahead
5-day outlook
Condition match
71%
Cloud50%
Wind65%
Temp100%

A good match for Llyn Coedty (Coedty Reservoir) — most conditions are close to what it fishes best in.

Other water nearby · 5
Gallery · 2
  1. Llyn Coedty reservoir seen from the track running towards Moel Eilio, near Dolgarrog
    Llyn Coedty (Coedty Reservoir), near Dolgarrog, Conwy
  2. Terrain map of the venue
    Terrain map
About this water

Coedty is the lowest of the Dolgarrog cluster — a five-hectare balance-tip hydro reservoir on the Afon Porth-llwyd below Llyn Eigiau, holding wild brown trout. All methods permitted except maggot and groundbait. Two-fish limit. Easy bank access for a Carneddau water, which is to say sensible boots and the willingness to walk.

  • Reservoir
  • Ordovician volcanics sediment
Why this score
  • Temperature (cool) is in the sweet spot for autumn fishing.
  • Buzzer is in its seasonal window, boosting the chance of targeted feeding.
  • Reservoirs of this kind fish hard at this time of year.
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