- Ecology: Good
- Chemical: Unknown
NRW (Wales) · UKGB110064048350
Rules at a glance
- Free fishing
- Fly only
How to fish it · for Rainbow
When
The buzzer is on at Elan Valley (Rhayader). The ripple should help fish move and feed more confidently.
Where
Start with Cormorant (10-12) — on the bob / top dropper. Rainbows respond to more active retrieves — try short strips between pauses. If that does not produce, switch depth or speed before changing the pattern entirely.
The plan
Plan A
Start with Cormorant (10-12) — on the bob / top dropper. Rainbows respond to more active retrieves — try short strips between pauses. If that does not produce, switch depth or speed before changing the pattern entirely.
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
Keep an eye on changing conditions — wind shifts and cloud breaks can trigger short feeding spells.
Either bank or boat
Good ripple suits both bank and boat. Bank: work inflows, dam walls, and points. Boat: broadside drift covering wind lanes.
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 3 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Top prey shown — see all 5 as a supporter.
Start free trial14-day free trial. Cancel anytime.
Through the year
0–3 scale · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
2
1
Reservoir BuzzerHatch
2
3
3
3
3
3
2
Daphnia SwarmHatch
2
3
3
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.
Ranked for today
Fly box · Rainbow
What's coming
Plan ahead
5-day outlook
Condition match
71%
Cloud50%
Wind65%
Temp100%
A good match for Elan Valley (Rhayader) — most conditions are close to what it fishes best in.
Other water nearby · 5
Gallery · 2
Claerwen Reservoir and mountains Terrain map
Water quality (WFD)
Why this score
- Temperature (cool) is in the sweet spot for autumn fishing.
- Buzzer is in its seasonal window, boosting the chance of targeted feeding.
- Reservoirs of this kind fish hard at this time of year.
Directions
Seasons & zones
- Trout 15 March → 5 October
Related guides
Casting instructors near here
Booking & contacts
Boards & regulators
Elan Valley (Rhayader)
How to fish it · for Rainbow
When
The buzzer is on at Elan Valley (Rhayader). The ripple should help fish move and feed more confidently.
Where
Start with Cormorant (10-12) — on the bob / top dropper. Rainbows respond to more active retrieves — try short strips between pauses. If that does not produce, switch depth or speed before changing the pattern entirely.
The plan
Plan A
Start with Cormorant (10-12) — on the bob / top dropper. Rainbows respond to more active retrieves — try short strips between pauses. If that does not produce, switch depth or speed before changing the pattern entirely.
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
Keep an eye on changing conditions — wind shifts and cloud breaks can trigger short feeding spells.
Either bank or boat
Good ripple suits both bank and boat. Bank: work inflows, dam walls, and points. Boat: broadside drift covering wind lanes.
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 3 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Top prey shown — see all 5 as a supporter.
Start free trial14-day free trial. Cancel anytime.
Through the year
0–3 scale · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
2
1
Reservoir BuzzerHatch
2
3
3
3
3
3
2
Daphnia SwarmHatch
2
3
3
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.
Ranked for today
Fly box · Rainbow
What's coming
Plan ahead
5-day outlook
Condition match
71%
Cloud50%
Wind65%
Temp100%
A good match for Elan Valley (Rhayader) — most conditions are close to what it fishes best in.
Other water nearby · 5
Gallery · 2
Claerwen Reservoir and mountains Terrain map
Water quality (WFD)
- Ecology: Good
- Chemical: Unknown
NRW (Wales) · UKGB110064048350
Why this score
- Temperature (cool) is in the sweet spot for autumn fishing.
- Buzzer is in its seasonal window, boosting the chance of targeted feeding.
- Reservoirs of this kind fish hard at this time of year.
Directions
Seasons & zones
- Trout 15 March → 5 October
Related guides
Casting instructors near here
Booking & contacts
Boards & regulators