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.

Tecwyn Uchaf is the flagship of the Artro & Talsarnau waters — the biggest lake in the association's book, and it fishes like it, with room enough for stocked rainbows to grow on and a background population of wild browns that turn up when you're not expecting them.

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. 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. Keep a sedge-style dry or emerger on a short leader for the evening rise. 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.

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.
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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
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
About this water

Tecwyn Uchaf is the flagship of the Artro & Talsarnau waters — the biggest lake in the association's book, and it fishes like it, with room enough for stocked rainbows to grow on and a background population of wild browns that turn up when you're not expecting them. It sits above the Dwyryd estuary in classic Ardudwy country, hills on three sides and Harlech's castle visible on a clear day if you know where to look. The stocking gives it more reliable sport than its smaller neighbours, and it's the water most newcomers to the club start on. Straightforward bank fishing, a decent head of fish, and views worth the walk regardless of how the day goes.

  • Lake
  • Ordovician volcanics
Why this score
  • Sedge is in its seasonal window, boosting the chance of targeted feeding.
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