Cwm Rheidol is the borderline case — an in-line hydro reservoir on the Afon Rheidol that's part lake, part dammed river, and very much subject to the whims of Statkraft's generation schedule. Twenty-five hectares of slow water below Plynlimon, holding wild brown trout that move in and out with the river, plus the occasional sewin or salmon that's worked up from the estuary. Fly, spin and worm permitted on the Aberystwyth AA ticket. The level fluctuates so the bank-line moves; pick a settled day if you can.
A patient day, if you fancy it
Useful ripple, fishable wave. Take your time — read the water before you cast.
35% confidence — limited data
Live now
Conditions on the water
Trends shown where the gauge supports them
Wind
SW 35 km/h
Fresh breeze
Wave
60 cm wave
Water temp
—
No reading
Air temp
11°C
Cloud
Overcast
Pressure
993 hPa
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
Late April–June; evening rises through summer
Where
Work Gold-ribbed Hare's Ear on the bob and Pheasant Tail Nymph on the point.
Today's tactical plan
The plan
Plan A · Plan B · what to watch · bank or boat
The plan
Plan A
Work Gold-ribbed Hare's Ear on the bob and Pheasant Tail 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
Evening tends to be the best period in summer — stay late if you can for a sedge or spinner fall.
Boat — at anchor
Windy conditions suit anchoring in productive areas rather than open-water drifting.
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
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Daddy Long LegsHatch
2
3
2
Murrough (Great Red Sedge)Hatch
1
2
1
Lake OliveHatch
1
2
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
6 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.
Access · 1
Check the current rules, permits and access before travelling.
Day ticket via Fishing PassportAberystwyth Angling Association (via Fishing Passport)
Wild brown troutFlySpinBait
Aberystwyth AA's largest water — a 25-hectare hydro reservoir on the Rheidol holding wild brown trout, with occasional sewin and salmon working up from the estuary. Bookable on the Fishing Passport. Level fluctuates with generation.
Day ticket via Aberystwyth AA Passport listing. EA/NRW rod licence required (migratory endorsement for sewin/salmon). Reservoir level fluctuates — check Statkraft generation.
Arrange access →About this water · Lough note · 4 min read
Cwm Rheidol Reservoir · profile
Who this water suits
Strengths · watch-outs · best for
About this water
Cwm Rheidol Reservoir, on the water
Field guide · contributor-editedCwm Rheidol Reservoir · about
What this water is
Background · character · contributors
About this water
Cwm Rheidol is the borderline case — an in-line hydro reservoir on the Afon Rheidol that's part lake, part dammed river, and very much subject to the whims of Statkraft's generation schedule. Twenty-five hectares of slow water below Plynlimon, holding wild brown trout that move in and out with the river, plus the occasional sewin or salmon that's worked up from the estuary. Fly, spin and worm permitted on the Aberystwyth AA ticket. The level fluctuates so the bank-line moves; pick a settled day if you can.
- Reservoir
- Silurian mudstone shale
Cwm Rheidol Reservoir · directions
How to get to the water
Directions
Cwm Rheidol Reservoir
Google Places
Cwm Rheidol is the borderline case — an in-line hydro reservoir on the Afon Rheidol that's part lake, part dammed river, and very much subject to the whims of Statkraft's generation schedule.
Species
A patient day, if you fancy it
Useful ripple, fishable wave. Take your time — read the water before you cast.
35% confidence — limited data
Conditions
Wind
SW 35 km/h
Fresh breeze
Wave
60 cm wave
Water temp
—
No reading
Air temp
11°C
Cloud
Overcast
Pressure
993 hPa
Rain · 24h
0.0 mm
No rain
Some readings unavailable — check directly before fishing.
Condition match
41%
Cloud70%
Wind30%
Temp25%
Conditions are away from this venue's sweet spot — it usually fishes best in ripple wind with mixed skies.
How to fish it · for brown trout
When
Late April–June; evening rises through summer
Where
Work Gold-ribbed Hare's Ear on the bob and Pheasant Tail Nymph on the point.
The plan
Plan A
Work Gold-ribbed Hare's Ear on the bob and Pheasant Tail 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
Evening tends to be the best period in summer — stay late if you can for a sedge or spinner fall.
Boat — at anchor
Windy conditions suit anchoring in productive areas rather than open-water drifting.
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
Black MidgeHatch
2
3
3
3
3
3
3
3
3
3
3
2
Daddy Long LegsHatch
2
3
2
Murrough (Great Red Sedge)Hatch
1
2
1
Lake OliveHatch
1
2
2
2
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Gallery · 1
Terrain map
Access · 1
Check the current rules, permits and access before travelling.
Day ticket via Fishing PassportAberystwyth Angling Association (via Fishing Passport)
Wild brown troutFlySpinBait
Aberystwyth AA's largest water — a 25-hectare hydro reservoir on the Rheidol holding wild brown trout, with occasional sewin and salmon working up from the estuary. Bookable on the Fishing Passport. Level fluctuates with generation.
Day ticket via Aberystwyth AA Passport listing. EA/NRW rod licence required (migratory endorsement for sewin/salmon). Reservoir level fluctuates — check Statkraft generation.
Arrange access →Directions
About this water
Cwm Rheidol is the borderline case — an in-line hydro reservoir on the Afon Rheidol that's part lake, part dammed river, and very much subject to the whims of Statkraft's generation schedule. Twenty-five hectares of slow water below Plynlimon, holding wild brown trout that move in and out with the river, plus the occasional sewin or salmon that's worked up from the estuary. Fly, spin and worm permitted on the Aberystwyth AA ticket. The level fluctuates so the bank-line moves; pick a settled day if you can.
- Reservoir
- Silurian mudstone shale
About this water · Lough note · 4 min read
Cwm Rheidol is the borderline case — an in-line hydro reservoir on the Afon Rheidol that's part lake, part dammed river, and very much subject to the whims of Statkraft's generation schedule. Twenty-five hectares of slow water below Plynlimon, holding wild brown trout that move in and out with the river, plus the occasional sewin or salmon that's worked up from the estuary. Fly, spin and worm permitted on the Aberystwyth AA ticket. The level fluctuates so the bank-line moves; pick a settled day if you can.
Other water nearby · 5