Stillwater · Ordovician Volcanics · Wales / Snowdonia (Ardudwy coast, Dwyryd catchment)

Llyn Tecwyn Uchaf

Choppy blue-grey water of Llyn Tecwyn Uchaf lake with a stony shoreline, pine forest and steep hillside in Snowdonia, North Wales.
Fair · Trout
Minkie · 6-10
Fairlive now
Sedge evening rise expected on Llyn Tecwyn Uchaf
Good wave on — drift country. A useful wave. Work the productive shore.
64% confidence

Llyn Tecwyn Uchaf is often best in spring through autumn.

What moved it
  • WindN 13 km/hGentle breeze
Today's fly
Minkie
Minkie6-10
Retrieve, sub-surface
Conditions on the water
Estimate
Wind
Gentle breeze
N 13 km/h
N
N
from the north
Wave20 cm ripple
Water temp—
Air temp12°C
CloudClear
Pressure1026 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 sedge is on. Daddy Longlegs 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 4 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
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 Artro & Talsarnau AAAccess varies
The association's largest and most reliable water — stocked rainbows over a background of wild browns, above the Dwyryd estuary near Talsarnau.
Visit official site ↗
What's coming
Plan ahead
5-day outlook
Condition match
52%
Cloud25%
Wind65%
Temp60%

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

Other water nearby · 5
Llyn Eiddew Bach
4.0 km
Brown trout
Llyn Eiddew Mawr
4.0 km
Brown trout
Llyn y Fedw
5.0 km
Brown trout
Llyn Trawsfynydd Reservoir
6.0 km
Brown trout · Rainbow trout
Afon Prysor
6.0 km
Brown trout
Gallery · 2
  1. Choppy blue-grey water of Llyn Tecwyn Uchaf lake with a stony shoreline, pine forest and steep hillside in Snowdonia, North Wales.
    Llyn Tecwyn Uchaf, Gwynedd
  2. Terrain map of the venue
    Terrain map
Why this score
  • Sedge 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