Stillwater · Granite · East / Wicklow

Pollaphuca / Blessington Lakes

Pollaphuca / Blessington Lakes — File:Poulaphouca Dam.JPG

The biggest stillwater fly water within an hour of Dublin — an ESB reservoir of roughly 5,500 acres / 2,200 ha on the upper Liffey, holding stocked brown and rainbow trout, a small population of wild brown trout, and a serious pike fishery that IFI specifically flag as productive on the fly.

Fair · Rainbow
Peter Ross Dabbler · 10-12
ReopenedReported 31 Jul 2026

Reopened — water temperatures have fallen

ESB reopened the Shannon and Liffey systems (including Blessington Lake) to angling from Friday 31 July 2026 as water temperatures dropped to acceptable levels. Permits are available again through the IFI permit site.

Shannon & Liffey systems reopen for fishing

Temporary notices from official orders and recent fishery reports — they clear automatically once out of date. Always confirm locally before travelling.

Fairlive now
Reasonable summer fishing likely at Pollaphuca / Blessington Lakes
Good wave on — drift country. A useful wave. Work the productive shore.
55% confidence

Pollaphuca / Blessington Lakes is often best in spring through autumn.

What moved it
  • WindNW 17 km/hGentle breeze
Today's fly
Peter Ross Dabbler
Peter Ross Dabbler10-12
Proven pattern for this period
Conditions on the water
Live gauge
Wind
Gentle breeze
NW 17 km/h
N
NW
from the north-west
Wave20 cm ripple
Water temp
Air temp20°C
CloudBroken
Pressure1020 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

How to fish it · for Rainbow
When
Conditions are not ideal but fishable at Pollaphuca / Blessington Lakes. The ripple should help fish move and feed more confidently.
Where
Start with Bibio (10-12) — on the bob / top dropper. Rainbows respond to more active retrieves — try short strips between pauses. If that does not produce, switch depth or speed before changing the pattern entirely.
The plan
Plan A

Start with Bibio (10-12) — on the bob / top dropper. Rainbows respond to more active retrieves — try short strips between pauses. If that does not produce, switch depth or speed before changing the pattern entirely.

Plan B

If the daddy is being refused, drop to a hopper or a single foam beetle and cover rising fish individually.

Watch for

Watch for Murrough towards evening — this could be the best window of the day.

Either bank or boat

Good ripple suits both bank and boat. Bank: work inflows, dam walls, and points. Boat: broadside drift covering wind lanes.

Sub-surface · on the nymphunder the surface

Hatch predictions

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 5 with Pro.

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Through the year
0–3 scale · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
Daphnia SwarmHatch
2
3
3
3
2
Daddy Long LegsHatch
2
3
2
Lake OliveHatch
2
3
3
3
3
3
2
Silverhorns & LonghornsHatch
1
2
2
2
1

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

Ranked for today
Rainbow fly box
Permits & access
Permit required — see local rules.
  • ESB-managed reservoir
  • Adult trout permit ~€30 via permits.fishinginireland.info
  • Single rod, daylight only, no maggots
  • Daily bag 4 trout, minimum size 9 inches
  • No fishing in buoyed dam headrace
  • Separate ESB boat permit required
What's coming
Plan ahead
5-day outlook
Condition match
65%
Cloud70%
Wind65%
Temp60%

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

Other water nearby · 5
Gallery · 2
  1. Pollaphuca / Blessington Lakes — File:Poulaphouca Dam.JPG
    File:Poulaphouca Dam.JPG
  2. Terrain map of the venue
    Terrain map
About this water

The biggest stillwater fly water within an hour of Dublin — an ESB reservoir of roughly 5,500 acres / 2,200 ha on the upper Liffey, holding stocked brown and rainbow trout, a small population of wild brown trout, and a serious pike fishery that IFI specifically flag as productive on the fly. The trout season runs 1 March – 30 September on a single-rod, daylight-only permit with a daily bag of 4 trout (minimum size 9 inches) and no fishing in the buoyed dam headrace. Pike and coarse run year-round except a closed month in October; coarse is currently catch-and-release only. The trout fishing is hatch-led when it works — duckfly in early spring, buzzers building into summer, sedges and terrestrials through the warm months. For pike on the fly, this is one of the better waters within easy reach of Dublin: 8–9 weight, wire trace, big baitfish patterns, careful handling.

  • Reservoir
  • Granite
Water quality (WFD)
  • EcologyUnknown
  • ChemicalUnknown
Why this score
  • Daddy Longlegs are in their seasonal window, boosting the chance of targeted feeding.
Directions
Seasons & zones
  • Trout 1 March30 September
  • Pike 1 November30 September
Related guides
Casting instructors near here
Booking & contacts