Stillwater · Ordovician Volcanics · Wales / Snowdonia (Rhyd Ddu), GB-WLS

Llyn y Dywarchen

Llyn y Dywarchen venue image
Good · Trout
Minkie · 6-10
Goodlive now
Buzzer on Llyn y Dywarchen
Useful ripple, fishable wave. Fishable ripple — drift the productive shore.
66% confidence

Llyn y Dywarchen is often best in spring through autumn.

What moved it
  • WindSW 29 km/hFresh breeze
Today's fly
Minkie
Minkie6-10
Retrieve, sub-surface
Conditions on the water
Estimate
Wind
Fresh breeze
SW 29 km/h
N
SW
from the south-west
Wave60 cm wave
Water temp13.9°C
Air temp16°C
CloudOvercast
Pressure1018 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 9 hours, running warmer than the water (16°C air against 14°C water). Expect fish at the north-eastern end — the bank it is blowing into — where the drift piles food, colour and warmth together. 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. Daddy Longlegs 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

Watch for Sedge towards evening — this could be the best window of the day.

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
SGLL Society's stocked water — rainbows 1.
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What's coming
Plan ahead
5-day outlook
Condition match
45%
Cloud50%
Wind30%
Temp60%

Conditions are away from Llyn y Dywarchen's sweet spot — it usually fishes best in ripple wind with cloud skies.

Other water nearby · 5
Gallery · 1
  1. Terrain map of the venue
    Terrain map
Why this score
  • Wind conditions (windy) are not ideal for this water.
  • Buzzer is in its seasonal window, boosting the chance of targeted feeding.
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