Stillwater · Volcanic · North Wales / Gwynedd (Snowdonia)

Cregennan Lakes

National Trust Car Park - Cregennan Lakes venue image
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Two small natural lakes owned by the National Trust, set at the foot of Cadair Idris in the southern Snowdonia National Park near Dolgellau.

Fair · Rainbow
Olive Damsel · 10-12
Fairlive now
Buzzer expected on Cregennan Lakes
Good wave on — drift country. A useful wave. Work the productive shore.
55% confidence
What moved it
  • WindW 7 km/hLight breeze
Today’s fly
OD
Olive Damsel10-12
Retrieve, sub-surface
Conditions on the water
Live gauge
Wind
Light breeze
W 7 km/h
N
W
from the west
WaveRipple
Water temp—
Air temp13°C
CloudOvercast
Pressure1022 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for rainbow
When
The buzzer is on. Murrough 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. In the ripple, a bushy searching dry (Hopper, Shipman's, Elk Hair Caddis) outperforms flush emergers — it stays visible and holds the surface tension.
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. In the ripple, a bushy searching dry (Hopper, Shipman's, Elk Hair Caddis) outperforms flush emergers — it stays visible and holds the surface tension.

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.

Boat — drift

A gentle ripple is ideal for drifting — broadside drift covering the wind lanes should be productive.

Through the year
0–3 scale · July 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
Rainbow fly box
What's coming
Plan ahead
5-day outlook
Condition match
73%
Cloud50%
Wind100%
Temp60%

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

Other water nearby · 5
Afon Eden (Welsh)
14 km
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Llyn Bugeilyn
24 km
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Llyn Trawsfynydd Reservoir
25 km
Brown trout · Rainbow trout
Afon Prysor
25 km
Brown trout
Llyn Craig-y-Pistyll
26 km
Brown trout
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

Two small natural lakes owned by the National Trust, set at the foot of Cadair Idris in the southern Snowdonia National Park near Dolgellau. The setting — open mountain lake, wide sky, and the presence of the mountain — is as much the point as the fishing. Wild and stocked trout in low-nutrient upland water, typical of the Ordovician volcanic and mudstone geology of Cadair Idris. The car park is reached via a narrow road from Arthog; access and stocking arrangements vary by season.

  • Lake
  • Volcanic
Why this score
  • Wind conditions (ripple) closely match what this water fishes best in.
  • Buzzer is in its seasonal window, boosting the chance of targeted feeding.
Related guides
Scotland Playbookloch & river fishingThermal Layers & Troutreading depth and temperatureEuro Nymphingsubsurface methods
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