Spate · Mixed · South Wales / Cardiff, GB-WLS

River Taff

Photo of River Taff

From Pen y Fan through Merthyr, Pontypridd, and Cardiff to the Bay — the Taff is the great urban recovery story of the South Wales coalfield.

Good · Atlantic Salmon
Cascade · 10-14
Goodlive now
A good day — worth the effort
Low and clear — careful approach country. Small, sparse flies, long leader, careful approach.
50% confidence
What moved it
  • Level0.36 mLast reading 1h ago
  • Water temp12.5°C
  • ClarityClear
Today's fly
Cascade
Cascade10-14
Regional salmon default — river-specific evidence is thin.
Conditions on the water
Live gauge
Level
Steady
0.36 m
Last reading 1h ago
Water temp12.5°C
ClarityClear
Weather10°C
WindNE 10 km/h
Pressure1025 hPa
Rain · recent1.9 mm
Rain · ahead0.0 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Atlantic Salmon
Ideal
13°C est.ideal 1016°C
0°14°28°
How to fish it · for Atlantic Salmon
When
Autumn. Fish on the drop after rain — slow 6-hour response on this larger river. Numbers are small.
Where
Lower Taff pools above the tidal limit at Cardiff Bay.
Method
Small doubles 10 to 12 across-and-down on a floating line; small tubes on a sink-tip in spring water. Cover the pools methodically. Mandatory catch-and-release under NRW byelaw — every salmon goes back.
Kit
12 ft #7/8 double-hander or 11 ft switch. Floating line plus light sink-tip. 10 to 12 lb fluoro tippet.
Why this works
Good — water temperature is working for you, but time of day is the limiting factor today.
Hatch timeline · todayPeak at 6am

Hatch predictions

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Sub-surface · on the nymphunder the surface

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Beyond the hatch · worth watchingambient prey

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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 · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Salmon runRun
1
2
2
2
2
1
Sea trout runRun
1
2
2
2
2
2
2
1
Trout seasonSeason
1
2
2
2
2
2
1
Grayling seasonSeason
2
2
1
1
2
2
2
2
2
2
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
Atlantic Salmon fly box

Wild-river first principles. Early-season nymphs and practical searching, then dry flies, emergers and spiders as hatches and surface activity improve.

Beats · 3
Fiddlers Elbow to Abercynon — day ticket via Fishing PassportAccess varies
Just over half a mile of double-bank Taff between the footbridge at Fiddler's Elbow and the Cynon confluence — wild brown trout and grayling.
Visit official site ↗
Merthyr Tydfil Angling Alliance — day ticket via Fishing PassportAccess varies
Around ten miles of the upper Taff and Taf Fawr controlled by Merthyr AA — lightly stocked early in the season but supported by a strong head of natural, hard-fighting wild browns.
Visit official site ↗
Taf Fechan — day ticket via Fishing Passport (Wild Stream)Access varies
Four and a half miles of Wild Stream fishing on the Taf Fechan — the eastern headwater of the Taff, controlled by Pontsticill Reservoir flow, running down to Cefn Coed where it joins the Taf Fawr to form the main Taff.
Visit official site ↗
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
  1. Photo of River Taff
    River Taff
  2. Terrain map of the venue
    Terrain map
About this water

From Pen y Fan through Merthyr, Pontypridd, and Cardiff to the Bay — the Taff is the great urban recovery story of the South Wales coalfield. Within living memory the river was effectively dead through Cardiff; today wild brown trout and grayling hold through the city centre, and sewin and salmon work back up on the autumn lifts. Not a remote wilderness fishery — an urban river of much more interest than it has any right to be. Atlantic salmon are under serious conservation pressure — Natural Resources Wales mandates catch-and-release for salmon on all rivers, so all fish must be returned.

Sea trout here

Summer-autumn runs (June–September), primarily nocturnal

  • Mixed
Water quality (WFD)
  • EcologyModerate
  • ChemicalUnknown
What this classification means

NRW WFD Cycle 3 — Taff (conf Taf Fechan to conf R Cynon): Moderate ecological status; Merthyr/Abercynon wild-stream beats. Corrected 2026-06-18 from a Whitchurch-Brook tributary tag. Source: NRW DataMapWales WFD Cycle 3 classification layer.

EA (England) · GB109057033100

Why this score · for Atlantic Salmon
  • Temperature10030% weight
  • Flow6025% weight
  • Clarity9520% weight
  • Feeding Time1515% weight
  • Pressure8510% weight
Directions
Seasons & zones
  • Salmon 1 May17 October
  • Sea trout 3 March17 October
  • Trout 3 March30 September
  • Grayling 16 June14 March

Sea trout: Variable seasonal (2026) — Recovering urban river — sewin work back up on autumn lifts in modest numbers. The Taff's primary fishery is wild trout and grayling; sea trout are a seasonal bonus. All-Wales At Risk picture applies.

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