Stillwater · Ordovician Volcanics · Wales / Snowdonia (Blaenau Ffestiniog uplands)

Llyn Morwynion

Bright blue upland lake (Llyn Morwynion) behind a dry stone wall, with green hills under a clear sky, Snowdonia.

Morwynion carries the same premium status as Gamallt — strong enough a fishery that the club caps it at three fish a day — and adds something none of the wild-only llyns can offer: a stocking of rainbow trout alongside the resident browns.

Fair · Trout
Marabou Damsel · 8-12
Fairlive now
Good drifting conditions on Llyn Morwynion
Good wave on — drift country. A useful wave. Work the productive shore.
51% confidence

Llyn Morwynion is often best in spring through autumn.

What moved it
  • WindSW 10 km/hLight breeze
Today's fly
Marabou Damsel
Marabou Damsel8-12
Retrieve, sub-surface
Conditions on the water
Live gauge
Wind
Light breeze
SW 10 km/h
N
SW
from the south-west
Wave20 cm ripple
Water temp—
Air temp17°C
CloudOvercast
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. Keep a sedge-style dry or emerger on a short leader for the evening rise.
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. Keep a sedge-style dry or emerger on a short leader for the evening rise.

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

Top nymph shown — see all 3 guilds with Pro.

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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 Cambrian Angling AssociationAccess varies
Premium, lower-elevation llyn holding wild brown trout plus stocked rainbows, 3-fish bag limit; covered by the Cambrian AA's single day ticket across the whole llyn portfolio.
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What's coming
Plan ahead
5-day outlook
Condition match
85%
Cloud50%
Wind100%
Temp100%

Conditions are ideal for Llyn Morwynion — wind, cloud and temperature all line up.

Other water nearby · 5
Llyn Dubach y Bont
1.0 km
Brown trout
Llynnoedd Gamallt
2.0 km
Brown trout
Llyn Manod
3.0 km
Brown trout
Llyn Dubach
4.0 km
Brown trout
Llyn Cwmprysor
6.0 km
Brown trout
Gallery · 2
  1. Bright blue upland lake (Llyn Morwynion) behind a dry stone wall, with green hills under a clear sky, Snowdonia.
    Llyn Morwynion
  2. Terrain map of the venue
    Terrain map
About this water

Morwynion carries the same premium status as Gamallt — strong enough a fishery that the club caps it at three fish a day — and adds something none of the wild-only llyns can offer: a stocking of rainbow trout alongside the resident browns. That combination makes it one of the more reliable waters in the portfolio on a difficult day, when the wild fish are sulking and a stocked rainbow will at least save the session. Lower down and easier to reach than the high mountain llyns, it's a sensible choice when time or weather rules out the longer walks further into the hills.

  • Lake
  • Ordovician volcanics
Why this score
  • Wind conditions (ripple) closely match what this water fishes best in.
  • Temperature (cool) is in the sweet spot for summer fishing.
  • Daddy Longlegs are in their 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