Spate · Slate Shale Snowdonia · Wales / Snowdonia (Mawddach catchment)

Afon Eden (Welsh)

The Welsh Eden — not to be confused with the Cumbrian river of the same name — is a small Snowdonia tributary of the Mawddach, running mostly southerly from Trawsfynydd down to Y Ganllwyd.

Species

A proper day on the water

Low and clear — careful approach country. Stay small, stay accurate.

90% confidence in this read
Water temperature for brown trout
Cool — slow
9°C est.ideal 10–16°C
0°14°28°
Why this score · for brown trout
  • Temperature7328% weight
  • Flow6022% weight
  • Clarity9518% weight
  • Feeding Time7013% weight
  • Pressure807% weight
  • Insect activity5212% weight
Conditions
Level
Dry recently
No gauge reading
Water temp
8.5°C
Estimated
Clarity
Clear
Air temp
9°C
Wind
SW 35 km/h
Fresh breeze
Pressure
992 hPa
Rain · 48h
1.8 mm
No meaningful rain
Rain · ahead
32.7 mm
Heavy rain · next 48h

Live readings — water temperature is an estimate where the gauge does not record it.

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
Good — water clarity is right today, though insect activity could be better.
Through the year
0–3 scale · June 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
GrannomHatch
2
2
Large StoneflyHatch
2
3
2
Yellow SallyHatch
2
3
2

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

Beats & Access · 1
Check the current rules, permits and access before travelling.
Afon Eden — three Passport beats (Upper, Middle, Lower)Multiple landowners (via Fishing Passport)
Wild brown troutFlyUpstream dry and nymph
Three short day-ticket beats on the Welsh Eden — Upper (1¼ mile), Middle (½ mile), Lower — all bookable on the Fishing Passport at £10/day each. Wild brown trout in small spate-river water. Six-foot rods and the willingness to crawl.
Day £10 per beat. EA/NRW rod licence required. All-Wales trout byelaw.
Arrange access →
Directions
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About this water

The Welsh Eden — not to be confused with the Cumbrian river of the same name — is a small Snowdonia tributary of the Mawddach, running mostly southerly from Trawsfynydd down to Y Ganllwyd. Wild brown trout in spate-river water, three short Passport beats (Upper, Middle, Lower) at a tenner a day each. The kind of small water where a six-foot rod and a willingness to crawl are worth more than any amount of gear. Sea trout work up from the Mawddach but the Eden itself is a brown-trout river.

  • Slate shale snowdonia
Seasons & zones
  • Trout3 March → 30 September
Other water nearby · 5