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

River Taf

Photo of River Taf

There is something about the Taf that invites quiet concentration — a compact South Wales river that rewards patience more than distance.

Marginal · Sea Trout
Black & Silver Tube · 1-2 inch
Marginallive now
Marginal — persistence required
River lifting fast on the rain. A short window at best — fish the sure lies and move on.
65% confidence
What moved it
  • Level0.98 mLifting fast
  • Water temp16.9°C
  • ClarityVery colouredColouring up
Today's fly
BS
Black & Silver Tube1-2 inch
In deep pools and dark water, silhouette and contrast do the work colour cannot. A fly that reads as black against depth is enough. Fish it broadside, hold the swing, let it hang at the dangle — that is when the best fish take.
Conditions on the water
Live gauge
Level
Rising
0.98 m
Lifting fast
Water temp16.9°C
ClarityVery coloured
Weather17°C
WindW 24 km/h
Pressure1020 hPa
Rain · recent5.1 mm
Rain · ahead6.1 mm

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

Water temperature for Sea Trout
Warm — slow
17°C est.ideal 8–15°C
0°14°28°
How to fish it · for Sea Trout
When
From dusk into the first half of the night.
Where
Deeper pools and slower glides · hold water and current seams.
Method
Fish dark patterns on a sink-tip or lightly sunk line, especially near structure.
Kit
10 ft #6/7 rod, floating line with a sink-tip option, 8–10 lb fluoro tippet for the swing.
Why this works
Fair — barometric pressure is working for you, but water temperature is the limiting factor today.
Hatch timeline · todayPeak at 11am

Hatch predictions

Today's headline hatch shown — see all 12 active hatches hour by hour as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 3 as a supporter.

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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 · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Salmon runRun
1
2
2
2
2
2
1
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
Sea Trout fly box

Shrimp fly theme — fished swing, wet_fly_swing

BS
Black & Silver TubeTop
1-2 inch · Tube
In deep pools and dark water, silhouette and contrast do the work colour cannot. A fly that reads as black against depth is enough. Fish it broadside, hold the swing, let it hang at the dangle — that is when the best fish take.
Medicine Fly
Medicine Fly
8-12 · Streamer
Slim and mobile — fished sunk through the pool when surface work is not producing. Consistently takes fish that will not come to the surface.
SF
Snake Fly (Black)
2-4 inch · Streamer
A mobile eel-like profile that undulates through deep pools — effective when sea trout are lying deep and not responding to conventional wets.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Eastern Cleddau
12 km
Brown trout · Salmon · Sea trout
Nevern
23 km
Brown trout · Salmon · Sea trout
Teifi
31 km
Brown trout · Salmon · Sea trout
Cothi
41 km
Brown trout · Salmon · Sea trout
Afon Llwchwr (Loughor)
42 km
Sea trout · Brown trout · Salmon
Gallery · 2
  1. Photo of River Taf
    River Taf — image via Wikipedia (River Taf)
  2. Terrain map of the venue
    Terrain map
About this water

There is something about the Taf that invites quiet concentration — a compact South Wales river that rewards patience more than distance. It rises on the Preseli Hills and runs through wooded valleys to tidal water at Laugharne, Dylan Thomas's adopted town. Salmon and sea trout (sewin) run from spring through autumn, with the sewin fishing best on warm summer nights from June. Brown trout are present throughout, particularly in the upper reaches where small dries and soft hackles are the natural choice. Wading access via club permits and day tickets. A spate river that responds quickly to rain — fish it on the drop for best results. 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)
  • Ecology: Good
  • Chemical: Unknown

NRW (Wales) · UKGB110060036284

The full read · show the working · for Sea Trout · confidence 65%
How the river scores — hydrology factors
Water heightMedium Ideal+3.4
Recent riseClear Recent Rise+8.8
Falling after liftStill Rising Hard-0.6
Water temperatureCool To Moderate+3.5
Time in seasonLate Season+2.3
ClarityClearing+2.4
Hydrology base19.8
Rules that fired
Rise Plus Good Temp Bonus+0.75
Will they take?Willingcaps the band

Fish should be willing to take — clearing, stained water, fresh fish moving on the lift.

Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
What would change the calculation
No prolonged stable spell before the current rise.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Salmon 1 April → 17 October
  • Trout 3 March → 30 September

Sea trout: Variable seasonal (2026) — NRW At Risk classification. Compact South Wales river with sewin runs from June. Stocks are marginal under current At Risk rating — night fishing in warm summer conditions is the productive window when water is right.

Salmon: Negligible (2026) — NRW / EA 2024 Salmon Stocks Assessment classifies this Welsh principal salmon river 'at risk' — egg deposition below Conservation Limit. All Wales byelaws (in force 2020-2030) make catch & release mandatory. Conservation priority; not a salmon fishing destination. The Taf carries small numbers of salmon; classified at risk.

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