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.
Fair · Trout
Minkie · 6-10
A respectable few hours, if you choose your moments
Good wave on — drift country. A useful wave. Work the productive shore.
45% confidence
limited data

Llyn Diwaunedd is often best in spring through autumn.

What moved it
  • WindNW 7 km/hLight breeze
Today's fly
Minkie
Minkie6-10
Retrieve, sub-surface
Conditions on the water
Estimate
Wind
Light breeze
NW 7 km/h
N
NW
from the north-west
WaveRipple
Water temp—
Air temp10°C
CloudOvercast
Pressure1023 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
The lake olive is 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

Sedge should come on through the afternoon as the water warms.

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
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 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
73%
Cloud50%
Wind100%
Temp60%

A good match for Llyn Diwaunedd — most conditions are close to what it fishes best in.

Other water nearby · 5
Llynnau Mymbyr
3.0 km
Brown trout
Llyn Bochlwyd
6.0 km
Brown trout
Llyn Conglog
6.0 km
Brown trout
Llyn Ffridd y Bwlch
6.0 km
Brown trout · Rainbow trout
Llyn Llagi
6.0 km
Brown trout
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
Why this score
  • Wind conditions (ripple) closely match what this water fishes best in.
  • Lake Olive is in its seasonal window, boosting the chance of targeted feeding.
Related guides
Scotland Playbookloch & river fishingThermal Layers & Troutreading depth and temperatureEuro Nymphingsubsurface methods
Casting instructors near here
Booking & contacts