Spate · Mixed · Mid Wales / Powys-Shropshire border (Tanat Valley, Severn/Vyrnwy tributary)

Tanat

A small clear Welsh river flowing over rocks beneath overhanging trees, River Tanat, mid-Wales.

A remote Berwyn spate stream running off Cyrniau Nod down through Llangynog, Llanrhaeadr-ym-Mochnant and Llangedwyn to join the Vyrnwy near Llansantffraid.

Prime · Brown Trout
Daddy Long Legs · 10-12
Primelive now
About as good as it gets
Low and clear — careful approach country. Take your time — read the water before you cast.
90% confidence
What moved it
  • LevelDry recentlyNo gauge reading
  • Water temp15.5°C
  • ClarityClear
Today's fly
Daddy Long Legs
Daddy Long Legs10-12
Upstream dry, on top
Conditions on the water
Estimate
Level
Dry recently
No gauge reading
Water temp15.5°C
ClarityClear
Weather12°C
WindW 8 km/h
Pressure1023 hPa
Rain · recent1.4 mm
Rain · ahead0.0 mm

No gauge on this water — readings are regional estimates from weather, not a live gauge.

Water temperature for Brown Trout
Ideal
16°C est.ideal 1016°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.
Why this works
Excellent — water temperature is right today, though insect activity could be better.
Hatch timeline · todayPeak at 2pm

Hatch predictions

Today's headline hatch shown — see all 12 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 2 with Pro.

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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
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

Traditional wild-trout llyn fishing. Wet flies and dabblers stay central, with buzzer, caddis, terrestrials and occasional small fry patterns becoming important as the season warms.

BU
Bumble
10-12 · Pattern
Fish it in the film
Beats · 5 · 1 reaches

Only the Horseshoe Inn and Green Inn stretches take casual day tickets; the rest of the river is club water (Upper Tanat FC, Gamefishers' Club, Vale of Clwyd AC), all membership-only.

Tanat day-ticket water · 5 beatsMixed
Upper Tanat Fishing Club, Horseshoe Inn, Llanyblodwel, Green Inn, Llangedwyn, The Gamefishers' Club…
The 5 beats
Upper Tanat Fishing ClubMembers
Upper Tanat Fishing Club
15 named beats on the Tanat (plus 5 on the Vyrnwy) — a members' club running since 1904 with a strong catch-and-release ethic. Classic Berwyn upland spate-stream fishing: remote, fast, and unstocked-feeling, though the club did historically stock some beats. Grayling here were reintroduced rather than a long-established native population.
Full members only — 6 guest tickets/year per member, must be accompanied. 2026 annual subscription £285, no joining fee, waiting list for membership.
Visit official site ↗
Horseshoe Inn, LlanyblodwelDay tickets
Horseshoe Inn, Llanyblodwel
About a mile of day-ticket water at Llanyblodwel, near the England border end of the river — the most accessible stretch for a visiting angler without a club connection.
Day ticket via the pub — confirm current availability by phone.
Green Inn, LlangedwynDay tickets
Green Inn, Llangedwyn
A stretch of the Tanat at Llangedwyn, further upstream than the Horseshoe Inn water.
Day ticket via the pub — confirm current availability by phone.
The Gamefishers' ClubMembers
The Gamefishers' Club
About a mile, mostly double bank, near Llanyblodwel close to the Shropshire border.
Members only.
Visit official site ↗
Vale of Clwyd Angling Club ("Monday Club")Members
Vale of Clwyd Angling Club
Just under a mile from The Mill at Penybontfawr upstream to Glanhafon-fawr near Llangedwyn — the furthest-upstream, closest-to-source club water on the river.
Members only.
Visit official site ↗
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
  1. A small clear Welsh river flowing over rocks beneath overhanging trees, River Tanat, mid-Wales.
    The river Tanat, mid-Wales
  2. Terrain map of the venue
    Terrain map
About this water

A remote Berwyn spate stream running off Cyrniau Nod down through Llangynog, Llanrhaeadr-ym-Mochnant and Llangedwyn to join the Vyrnwy near Llansantffraid. Wild brown trout and (reintroduced, now established) grayling are the real fishery here; salmon are a historic spawning presence rather than a current target. Flashy and remote — exactly what you'd expect of an upland Berwyn river.

  • Mixed
The full read · show the working · for Brown Trout · confidence 90%
How the 86 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time80 × 13%10.4
Pressure80 × 7%5.6
Insect activity58 × 12%7.0
Conditions total= 86
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
Directions
Seasons & zones

Salmon: Negligible (2026) — A 2005 Wild Trout Trust survey called the club's Tanat holding a major Severn-catchment salmon spawning area (200+ redds counted) and an EA indicator river for the Salmon Action Plan. That's a two-decade-old snapshot; the wider Severn system has since seen an emergency 2019 byelaw and continued stock decline, with Welsh principal salmon rivers broadly classed at risk. Treat the Tanat as a historic spawning tributary, not an active rod fishery.

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