Elan Valley is more than one reservoir — it's a managed cascade of waters in a spectacular moorland valley, overseen by the Rhayader and Elan Valley Angling Association. Multiple lakes here (Caban Coch, Garreg-ddu, Pen-y-garreg, Claerwen) offer layered fishing from April through October. The limestone and moorland geology produces reliable hatches and fertile food. The valley setting is magnificent — you're fishing some of Wales's most dramatic scenery without sacrificing access. Spring and early summer produce the best sport; autumn can be productive after a build-up of cold nights. This is pilgrimage water for Welsh fly fishers — plan to spend days here, not hours.
Reasonable summer fishing likely at Elan Valley (Rhayader)
Useful ripple, fishable wave. Worth a session if the wind holds.
Conditions are not ideal but fishable at Elan Valley (Rhayader).
57% confidence in this read
Live now
Conditions on the water
Trends shown where the gauge supports them
Wind
W 22 km/h
Moderate breeze
Wave
40 cm chop
Water temp
—
No reading
Air temp
12°C
Cloud
Overcast
Pressure
1023 hPa
Rain · 24h
0.0 mm
No rain
Some readings unavailable — check directly before fishing.
How to fish · for rainbow trout
The brief
When · where · method · kit
How to fish it · for rainbow trout
When
Conditions are not ideal but fishable at Elan Valley (Rhayader).
Where
Start with Booby (8-10) on a fast strip on floating line or static on sinking. Midday in warm weather — switch to a fast-sink or Di-7 and fish boobies or blobs along the bottom. Rainbows respond to more active retrieves — try short strips between pauses.
Today's tactical plan
The plan
Plan A · Plan B · what to watch · bank or boat
The plan
Plan A
Start with Booby (8-10) on a fast strip on floating line or static on sinking. Midday in warm weather — switch to a fast-sink or Di-7 and fish boobies or blobs along the bottom. Rainbows respond to more active retrieves — try short strips between pauses.
Plan B
If the main plan stalls, drop to a size 14–16 midge — switch to a washing-line or suspender rig and change drift line before you change food group.
Watch for
Evening tends to be the best period in summer — stay late if you can for a sedge or spinner fall.
Bank, sheltered shores
In wind, bank fish the lee shore — boats can anchor in productive areas if conditions allow.
Hatches & runs
What's on, when
Twelve months at a glance
Through the year
0–3 scale · June highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
2
1
Daphnia SwarmHatch
2
3
3
3
2
Daddy Long LegsHatch
2
3
2
Lake OliveHatch
2
3
3
3
3
3
2
Silverhorns & LonghornsHatch
1
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
5 patterns from this venue's curated pack
Evidence
Why today scores what it does
The factors driving today's verdict
Why this score
- Wind conditions (windy) are not ideal for this water.
- Buzzer is in its seasonal window, boosting the chance of targeted feeding.
The water
On the lough
5 photos + lough map
Gallery · 6
Pen-y-Garreg — quiet water between the Elan dams, wild brown trout. 
Claerwen — the largest, most remote Elan reservoir, big wild browns. 
Craig Goch in spate — the uppermost dam in the Elan chain. 
Pen y Garreg in flood — the mid-valley dam above fine trout water. 
Claerwen at its widest — open water meeting the bare Cambrian hills. Terrain map
About this water · Lough note · 4 min read
Elan Valley (Rhayader) · profile
Who this water suits
Strengths · watch-outs · best for
About this water
Elan Valley (Rhayader), on the water
Field guide · contributor-editedElan Valley (Rhayader) · about
What this water is
Background · character · contributors
About this water
Elan Valley is more than one reservoir — it's a managed cascade of waters in a spectacular moorland valley, overseen by the Rhayader and Elan Valley Angling Association. Multiple lakes here (Caban Coch, Garreg-ddu, Pen-y-garreg, Claerwen) offer layered fishing from April through October. The limestone and moorland geology produces reliable hatches and fertile food. The valley setting is magnificent — you're fishing some of Wales's most dramatic scenery without sacrificing access. Spring and early summer produce the best sport; autumn can be productive after a build-up of cold nights. This is pilgrimage water for Welsh fly fishers — plan to spend days here, not hours.
- Reservoir
- Mixed
Elan Valley (Rhayader) · directions
How to get to the water
Directions
Elan Valley (Rhayader) · zones
Where the rules change
Seasons · zones · per-species rules
Seasons & zones
- Trout15 March → 5 October
Elan Valley (Rhayader)
Contributor photo
Pen-y-Garreg — quiet water between the Elan dams, wild brown trout.
Photo: "Pen-y-Garreg reservoir" by David Smith — CC BY-SA 2.0 (Geograph)
Elan Valley is more than one reservoir — it's a managed cascade of waters in a spectacular moorland valley, overseen by the Rhayader and Elan Valley Angling Association.
Species
Reasonable summer fishing likely at Elan Valley (Rhayader)
Useful ripple, fishable wave. Worth a session if the wind holds.
Conditions are not ideal but fishable at Elan Valley (Rhayader).
57% confidence in this read
Conditions
Wind
W 22 km/h
Moderate breeze
Wave
40 cm chop
Water temp
—
No reading
Air temp
12°C
Cloud
Overcast
Pressure
1023 hPa
Rain · 24h
0.0 mm
No rain
Some readings unavailable — check directly before fishing.
Condition match
45%
Cloud50%
Wind30%
Temp60%
Conditions are away from this venue's sweet spot — it usually fishes best in ripple wind with cloud skies.
How to fish it · for rainbow trout
When
Conditions are not ideal but fishable at Elan Valley (Rhayader).
Where
Start with Booby (8-10) on a fast strip on floating line or static on sinking. Midday in warm weather — switch to a fast-sink or Di-7 and fish boobies or blobs along the bottom. Rainbows respond to more active retrieves — try short strips between pauses.
The plan
Plan A
Start with Booby (8-10) on a fast strip on floating line or static on sinking. Midday in warm weather — switch to a fast-sink or Di-7 and fish boobies or blobs along the bottom. Rainbows respond to more active retrieves — try short strips between pauses.
Plan B
If the main plan stalls, drop to a size 14–16 midge — switch to a washing-line or suspender rig and change drift line before you change food group.
Watch for
Evening tends to be the best period in summer — stay late if you can for a sedge or spinner fall.
Bank, sheltered shores
In wind, bank fish the lee shore — boats can anchor in productive areas if conditions allow.
Why this score
- Wind conditions (windy) are not ideal for this water.
- Buzzer is in its seasonal window, boosting the chance of targeted feeding.
Through the year
0–3 scale · June highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
2
1
Daphnia SwarmHatch
2
3
3
3
2
Daddy Long LegsHatch
2
3
2
Lake OliveHatch
2
3
3
3
3
3
2
Silverhorns & LonghornsHatch
1
2
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Gallery · 6
Pen-y-Garreg — quiet water between the Elan dams, wild brown trout. Claerwen — the largest, most remote Elan reservoir, big wild browns. Craig Goch in spate — the uppermost dam in the Elan chain. Pen y Garreg in flood — the mid-valley dam above fine trout water. Claerwen at its widest — open water meeting the bare Cambrian hills. Terrain map
Directions
About this water
Elan Valley is more than one reservoir — it's a managed cascade of waters in a spectacular moorland valley, overseen by the Rhayader and Elan Valley Angling Association. Multiple lakes here (Caban Coch, Garreg-ddu, Pen-y-garreg, Claerwen) offer layered fishing from April through October. The limestone and moorland geology produces reliable hatches and fertile food. The valley setting is magnificent — you're fishing some of Wales's most dramatic scenery without sacrificing access. Spring and early summer produce the best sport; autumn can be productive after a build-up of cold nights. This is pilgrimage water for Welsh fly fishers — plan to spend days here, not hours.
- Reservoir
- Mixed
Water quality (WFD)
- Ecology: Good
- Chemical: Unknown
EA waterbody UKGB110064048350
Seasons & zones
- Trout15 March → 5 October
About this water · Lough note · 4 min read
Elan Valley is more than one reservoir — it's a managed cascade of waters in a spectacular moorland valley, overseen by the Rhayader and Elan Valley Angling Association. Multiple lakes here (Caban Coch, Garreg-ddu, Pen-y-garreg, Claerwen) offer layered fishing from April through October. The limestone and moorland geology produces reliable hatches and fertile food. The valley setting is magnificent — you're fishing some of Wales's most dramatic scenery without sacrificing access. Spring and early summer produce the best sport; autumn can be productive after a build-up of cold nights. This is pilgrimage water for Welsh fly fishers — plan to spend days here, not hours.
Other water nearby · 5
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