Stillwater · Ordovician Volcanics · Wales / Snowdonia (Nant Ffrancon, Ogwen catchment)

Llyn Ogwen

Wide view across Llyn Ogwen towards Snowdonia mountains, with waterfowl standing on a rock in the lake and green hillsides on both shores.
Fair · Trout
Minkie · 6-10
Fairlive now
Sedge evening rise expected on Llyn Ogwen
Good wave on — drift country. A useful wave. Work the productive shore.
58% confidence

Llyn Ogwen is often best in spring through autumn.

What moved it
  • WindN 8 km/hLight breeze
Today's fly
Minkie
Minkie6-10
Retrieve, sub-surface
Conditions on the water
Live gauge
Wind
Light breeze
N 8 km/h
N
N
from the north
WaveRipple
Water temp—
Air temp14°C
CloudOvercast
Pressure1020 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

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. Dusk on the lake is prime time for surface feeding — stay out as long as light allows.
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 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 Ogwen Valley Angling AssociationAccess varies
Largest and most accessible of OVAA's four waters, roadside along the A5 in Nant Ffrancon.
Visit official site ↗
What's coming
Plan ahead
5-day outlook
Condition match
73%
Cloud50%
Wind100%
Temp60%

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

Other water nearby · 5
Llyn Bochlwyd
1.0 km
Brown trout
Ffynnon Lloer
2.0 km
Brown trout
Llyn Idwal
2.0 km
Brown trout
Llynnau Mymbyr
5.0 km
Brown trout
Llyn Dulyn
7.0 km
Brown trout · Arctic char
Gallery · 2
  1. Wide view across Llyn Ogwen towards Snowdonia mountains, with waterfowl standing on a rock in the lake and green hillsides on both shores.
    Llyn Ogwen
  2. Terrain map of the venue
    Terrain map
Why this score
  • Wind conditions (ripple) closely match what this water fishes best in.
  • 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