Stillwater · Limestone · North Wales / Anglesey, GB-WLS

Llyn Coron

Llyn Coron on a frosty morning, near Llangadwaladr, Anglesey

Llyn Coron is Anglesey's principal stillwater — a shallow, fertile limestone loch that sits quiet in the island's pastoral landscape.

Marginal · Trout
Diawl Bach · 12-14
A patient day, if you fancy it
Good wave on — drift country. Slow going — pick your moments and do not force it.
43% confidence
limited data

Llyn Coron is often best in spring through autumn.

What moved it
  • WindN 16 km/hGentle breeze
Today's fly
Diawl Bach
Diawl Bach12-14
Washing-line, sub-surface
Conditions on the water
Live gauge
Wind
Gentle breeze
N 16 km/h
N
N
from the north
Wave20 cm ripple
Water temp
Air temp21°C
CloudOvercast
Pressure1019 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for Trout
When
The sedge is on. Daddy Longlegs may also come into play as the day warms. Drift conditions look good — cover the wind lanes. The breeze will be blowing terrestrial insects onto the water — check the wind lanes and downwind margins for rising fish.
Where
Set up a broadside drift and cover the water systematically. Work Olive Damsel on the bob and Diawl Bach on the point.
The plan
Plan A

Set up a broadside drift and cover the water systematically. Work Olive Damsel on the bob and Diawl Bach 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

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

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Beyond the hatch · worth watchingambient prey

Hatch predictions

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Through the year
0–3 scale · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
2
1
Daphnia SwarmHatch
2
3
3
3
2
Daddy Long LegsHatch
2
3
2
Lake OliveHatch
2
3
3
3
3
3
2
Silverhorns & LonghornsHatch
1
2
2
2
1

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Trout fly box

More straightforward stocked-water behaviour than the upland competition reservoirs, with stronger early-season lure and booby bias but still good natural-fly periods.

What's coming
Plan ahead
5-day outlook
Condition match
59%
Cloud50%
Wind65%
Temp60%

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

Other water nearby · 5
Gallery · 2
  1. Llyn Coron on a frosty morning, near Llangadwaladr, Anglesey
    Llyn Coron, a natural lowland lake on Anglesey
  2. Terrain map of the venue
    Terrain map
About this water

Llyn Coron is Anglesey's principal stillwater — a shallow, fertile limestone loch that sits quiet in the island's pastoral landscape. Managed as a dedicated fly-fishing venue, it produces reliable brown and rainbow trout on buzzers and nymphs. The shallow nature means fish are often visible, so presentation matters. Daphnia blooms in summer can produce spectacular buzzer hatches. Bank fishing only; the compact scale rewards methodical coverage over distant casting. A water that says 'come spend time here' rather than 'come kill fish' — exactly right for the thoughtful angler.

  • Loch
  • Limestone
Water quality (WFD)
  • EcologyPoor
  • ChemicalUnknown
What this classification means

NRW WFD Cycle 3 (lake) — Llyn Coron: Poor ecological status. Re-tagged 2026-06-18 from the Ddrydwy river reach to the lake's own waterbody (was recorded Moderate). Source: NRW DataMapWales WFD Cycle 3 classification layer.

NRW (Wales) · GB31033337

Why this score
  • Sedge is in its seasonal window, boosting the chance of targeted feeding.
Directions
Seasons & zones
  • Trout 15 March5 October
Related guides
Casting instructors near here
Booking & contacts
Clubs & associations