Stillwater · Ordovician Volcanics · Wales / Snowdonia (Bala area, Prysor catchment)

Llyn Cwmprysor

Blue upland lake fringed by a fenced bank of grass and shrubs, with forested hills and a rounded mountain summit in the background under a partly cloudy sky.

Cwmprysor is Bala and District's one small stillwater beyond the river beats and Llyn Tegid itself — an afterthought in the club's book, geographically, but not without its own quiet appeal.

Good · Trout
Minkie · 6-10
Goodlive now
Sedge evening rise expected on Llyn Cwmprysor
Good wave on — drift country. Drift fishing weather — three flies on a long leader.
66% confidence

Llyn Cwmprysor is often best in spring through autumn.

What moved it
  • WindNE 7 km/hLight breeze
Today's fly
Minkie
Minkie6-10
Retrieve, sub-surface
Conditions on the water
Estimate
Wind
Light breeze
NE 7 km/h
N
NE
from the north-east
WaveRipple
Water temp
Air temp9°C
CloudClear
Pressure1026 hPa
Rain · recent0.0 mm

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

How to fish it · for Trout
When
May–September; evenings best
Where
Set up a broadside drift and cover the water systematically. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point. Keep a sedge-style dry or emerger on a short leader for the evening rise.
The plan
Plan A

Set up a broadside drift and cover the water systematically. Work a bushy searching pattern on the bob and drop a contrasting nymph on the point. Keep a sedge-style dry or emerger on a short leader for the evening rise.

Plan B

If the main plan is not working, switch to a smaller, more imitative pattern fished slower and deeper. A change of drift angle can also make a difference.

Watch for

Evening tends to be the best period in summer — stay late if you can for a sedge or spinner fall.

Bank

Bank-only venue. Fish from accessible margins, points, weed edges, and inflows.

Sub-surface · on the nymphunder the surface

Hatch predictions

See the full sub-surface read with Pro.

Start free trial

14-day free trial. Cancel anytime.

Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 4 with Pro.

Start free trial

14-day free trial. Cancel anytime.

Through the year
0–3 scale · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Heather FlyHatch
2
2
Daddy Long LegsHatch
2
3
2
Claret DunHatch
2
3
2
Murrough (Great Red Sedge)Hatch
2
3
2

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

Ranked for today
Trout fly box
Bays & launches · 1
Day ticket via Bala and District AAAccess varies
Small, unstocked wild-brown stillwater beyond the club's river beats and Llyn Tegid — quiet alternative when Tegid is busy.
Visit official site ↗
What's coming
Plan ahead
5-day outlook
Condition match
66%
Cloud25%
Wind100%
Temp60%

A reasonable day here, though cloud isn't quite in the sweet spot.

Other water nearby · 5
Gallery · 2
  1. Blue upland lake fringed by a fenced bank of grass and shrubs, with forested hills and a rounded mountain summit in the background under a partly cloudy sky.
    Llyn Tryweryn
  2. Terrain map of the venue
    Terrain map
About this water

Cwmprysor is Bala and District's one small stillwater beyond the river beats and Llyn Tegid itself — an afterthought in the club's book, geographically, but not without its own quiet appeal. It holds wild brown trout in modest numbers, the kind of water you'd fish on a day when Tegid's too bright or too busy and a smaller, more intimate lake sounds better. There's little to say about it beyond the essentials: no stocking, no boat, no crowd, a short walk to reach it, and browns that behave like browns do on hill water everywhere — sporadic, a little suspicious, occasionally generous. It rounds out the association's offer rather than headlining it, and that's fine.

  • Lake
  • Ordovician volcanics
Why this score
  • Wind conditions (ripple) closely match what this water fishes best in.
  • Sedge is in its seasonal window, boosting the chance of targeted feeding.
Related guides
Casting instructors near here
Booking & contacts