Stillwater · Ordovician Volcanics · Wales / Snowdonia (Migneint uplands, Conwy catchment)

Llyn Diwaunedd

A moss-covered rock in the foreground of a calm upland lake, with bare mountain slopes rising behind under a clear sky.

Diwaunedd is fished, oddly enough, by a club from the Wirral — Hoylake Fly Fishers make the trip in from across the water to look after this remote patch of Snowdonia upland, which tells you something about how far anglers will travel for a lake worth the walk.

Fair · Trout
Marabou Damsel · 8-12
Fairlive now
Good drifting conditions on Llyn Diwaunedd
Good wave on — drift country. A useful wave. Work the productive shore.
63% confidence

Llyn Diwaunedd is often best in spring through autumn.

What moved it
  • WindN 8 km/hLight breeze
Today's fly
Marabou Damsel
Marabou Damsel8-12
Retrieve, sub-surface
Conditions on the water
Live gauge
Wind
Light breeze
N 8 km/h
N
N
from the north
WaveRipple
Water temp
Air temp12°C
CloudClear
Pressure1021 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for Trout
When
The daddy longlegs are on. Sedge may also come into play as the day warms. The ripple is helpful — fish should move onto the feed and a slow-drifted team or single wet will cover water well.
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

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

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
Daddy Long LegsHatch
2
3
2
Murrough (Great Red Sedge)Hatch
2
3
2
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Lake OliveHatch
1
2
2
2
2
2
1

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 Hoylake Fly FishersAccess varies
Remote Snowdonia upland lake managed by Hoylake Fly Fishers (a Wirral-based club fishing Welsh water).
Visit official site ↗
What's coming
Plan ahead
5-day outlook
Condition match
66%
Cloud25%
Wind100%
Temp60%

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

Other water nearby · 5
Gallery · 2
  1. A moss-covered rock in the foreground of a calm upland lake, with bare mountain slopes rising behind under a clear sky.
    Llyn D'wennydd
  2. Terrain map of the venue
    Terrain map
About this water

Diwaunedd is fished, oddly enough, by a club from the Wirral — Hoylake Fly Fishers make the trip in from across the water to look after this remote patch of Snowdonia upland, which tells you something about how far anglers will travel for a lake worth the walk. The wild browns run small as a rule, most a pound or under, but there are bigger fish in there — reports of browns up to five pounds keep the water honest, the kind of story that gets repeated at the car park more often than it gets confirmed on the bank. Arctic char share the depths too, a cold-water relic most visitors never see or catch, adding a genuine oddity to what's otherwise a classic small hill lake.

  • Lake
  • Ordovician volcanics
Why this score
  • Wind conditions (ripple) closely match what this water fishes best in.
  • Daddy Longlegs are in their seasonal window, boosting the chance of targeted feeding.
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