Glacial corrie llyn in the Brecon Beacons below Corn Du. Wild brown trout in dramatic mountain scenery. Access by 2-mile walk from Storey Arms. Classic Beacons hill llyn — small, wild fish in clear water. Traditional wet flies and dabblers.
Rules at a glance
- Free fishing
- Fly only
A patient day, if you fancy it
Good wave on — drift country. Take your time — read the water before you cast.
38% confidence — limited data
Live now
Conditions on the water
Trends shown where the gauge supports them
Wind
W 13 km/h
Gentle breeze
Wave
20 cm ripple
Water temp
—
No reading
Air temp
5°C
Cloud
Broken
Pressure
—
Rain · 24h
0.0 mm
No rain
Some readings unavailable — check directly before fishing.
How to fish · for brown trout
The brief
When · where · method · kit
How to fish it · for brown trout
When
June to August
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.
Method
Method not yet authored.
Kit
Kit not yet authored.
Today's tactical plan
The plan
Plan A · Plan B · what to watch · bank or boat
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.
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
Keep an eye on changing conditions — wind shifts and cloud breaks can trigger short feeding spells.
Boat — drift
A gentle ripple is ideal for drifting — broadside drift covering the wind lanes should be productive.
Hatches & runs
What's on, when
Twelve months at a glance
Through the year
0–3 scale · May highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
Large Dark OliveHatch
1
2
2
1
March BrownHatch
1
2
1
Iron BlueHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Today's fly · curated pack
Top pattern + the box
4 patterns from this venue's curated pack
Evidence
Why today scores what it does
The factors driving today's verdict
Why this score
- late spring conditions with cloud skies and breezy wind.
Detail · next 12h
Precipitation
The reading most likely to move tomorrow's verdict
About this water · Lough note · 4 min read
Llyn Cwm Llwch · profile
Who this water suits
Strengths · watch-outs · best for
About this water
Llyn Cwm Llwch, on the water
Field guide · contributor-editedLlyn Cwm Llwch · about
What this water is
Background · character · contributors
About this water
Glacial corrie llyn in the Brecon Beacons below Corn Du. Wild brown trout in dramatic mountain scenery. Access by 2-mile walk from Storey Arms. Classic Beacons hill llyn — small, wild fish in clear water. Traditional wet flies and dabblers.
- Lake
- Sandstone
Llyn Cwm Llwch · directions
How to get to the water
Directions
Llyn Cwm Llwch · zones
Where the rules change
Seasons · zones · per-species rules
Seasons & zones
- Trout3 March → 30 September
Llyn Cwm Llwch
Google Places
Glacial corrie llyn in the Brecon Beacons below Corn Du.
Species
A patient day, if you fancy it
Good wave on — drift country. Take your time — read the water before you cast.
38% confidence — limited data
Conditions
Wind
W 13 km/h
Gentle breeze
Wave
20 cm ripple
Water temp
—
No reading
Air temp
5°C
Cloud
Broken
Pressure
—
Rain · 24h
0.0 mm
No rain
Some readings unavailable — check directly before fishing.
Condition match
54%
Cloud70%
Wind65%
Temp25%
A reasonable day here, though temperature isn't quite in the sweet spot.
How to fish it · for brown trout
When
June to August
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.
Method
Method not yet authored.
Kit
Kit not yet authored.
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.
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
Keep an eye on changing conditions — wind shifts and cloud breaks can trigger short feeding spells.
Boat — drift
A gentle ripple is ideal for drifting — broadside drift covering the wind lanes should be productive.
Why this score
- late spring conditions with cloud skies and breezy wind.
Through the year
0–3 scale · May highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
Large Dark OliveHatch
1
2
2
1
March BrownHatch
1
2
1
Iron BlueHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Gallery · 1
Terrain map
Directions
About this water
Glacial corrie llyn in the Brecon Beacons below Corn Du. Wild brown trout in dramatic mountain scenery. Access by 2-mile walk from Storey Arms. Classic Beacons hill llyn — small, wild fish in clear water. Traditional wet flies and dabblers.
- Lake
- Sandstone
Seasons & zones
- Trout3 March → 30 September
About this water · Lough note · 4 min read
Glacial corrie llyn in the Brecon Beacons below Corn Du. Wild brown trout in dramatic mountain scenery. Access by 2-mile walk from Storey Arms. Classic Beacons hill llyn — small, wild fish in clear water. Traditional wet flies and dabblers.
Other water nearby · 5
Booking & contacts