Spate · Carboniferous Coal Measures · Wales / South Wales (Aberdare), GB-WLS

Afon Cynon

Afon Cynon venue image

The Cynon at Aberdare — half a mile of mostly double-bank fishing, medium to small river with some surprisingly deep pools.

Poor · Brown Trout
Partridge and Orange · 14-16
Closed season
Out of season. Try elsewhere.
Closed — confidence not applicable today.
What moved it
  • LevelProxyvia River Taff
  • Water temp12.7°C
  • ClarityVery colouredColouring up
Today's fly
Partridge and Orange
Partridge and Orange14-16
Upstream, in the film
Conditions on the water
Proxy gauge
Level
Rising
Proxy
via River Taff
Water temp12.7°C
ClarityVery coloured
Weather14°C
WindW 29 km/h
Pressure1014 hPa
Rain · recent3.1 mm
Rain · ahead1.0 mm

No gauge on this water — conditions are inferred from River Taff. The trend transfers, the absolute level does not.

Water temperature for Brown Trout
Ideal
13°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Nymphing can work through most of the day.
Where
Cover mixed depths.
Method
Start with tight-line nymphs and adjust if fish rise or drift higher.
Kit
9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.
Likely species
Stoneflies
Gammarids
Hatch timeline · todayPeak at 11am

Hatch predictions

Today's headline hatch shown — see all 9 active hatches hour by hour as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Supporters see what else is on the menu.

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Evidence
Survey-backed · regionalHigh confidence

Backed by regional invertebrate surveys; no sampling on this exact reach yet.

Through the year
0–3 scale · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
March BrownHatch
2
3
2
CapererHatch
2
3
3
2
Heather FlyHatch
2
2
Autumn DunHatch
2
3
2

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Brown Trout fly box

Spider-heavy and practical. Strong tradition of North Country soft hackles, useful nymphing, and simple dry flies when fish rise properly.

Beats · 1
Ynysllwyd (Aberdare AA) — Wild Stream day ticketAccess varies
Half a mile of mostly double-bank wild brown trout fishing on the Cynon at Aberdare.
Visit official site ↗
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
River Taff
11 km
0
Brown trout · Grayling · Salmon
Neath
13 km
0
Brown trout · Salmon · Sea trout
Rhondda
14 km
0
Brown trout · Grayling · Salmon
Llwyn-on Reservoir
9.0 km
Brown trout · Rainbow trout
Bargoed Park
11 km
Brown trout · Rainbow trout
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

The Cynon at Aberdare — half a mile of mostly double-bank fishing, medium to small river with some surprisingly deep pools. Chest waders recommended. Wild brown trout in post-industrial water that has recovered from worse than most rivers ever see; a useful reminder that South Wales has real trout fishing if you know where to look. Wild Stream Passport beat — eleven quid a day or part of the Wild Stream season permit.

  • Carboniferous coal measures
The full read · show the working · for Brown Trout · confidence 45%
How the 0 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow55 × 22%12.1
Clarity15 × 18%2.7
Feeding Time55 × 13%7.2
Pressure80 × 7%5.6
Insect activity44 × 12%5.3
Limiting factor: Water is very coloured — too coloured for Brown Trout= 61
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via River Taffproxy
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
A drop and clear would lift the flow and clarity scores.
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 3 March → 30 September
Related guides
Yorkshire & SpidersNorth Country methodsEuro Nymphingsubsurface methods
Casting instructors near here
Booking & contacts
Boards & regulators