Stillwater · Limestone · East / Dublin, IE

Bohernabreena Reservoirs

View across Bohernabreena Reservoir surrounded by forested hills in the Dublin Mountains.

Two reservoirs sitting in the Glenasmole valley south of Dublin, near enough to the city to be a surprise.

Fair · Trout
Perch Fry · 8-10_long_shank
Fairlive now
Reasonable autumn fishing likely at Bohernabreena Reservoirs
Useful ripple, fishable wave. Worth a session if the wind holds.
61% confidence

Bohernabreena Reservoirs is often best in spring through autumn.

What moved it
  • WindW 23 km/hModerate breeze
Today's fly
Perch Fry
Perch Fry8-10_long_shank
Retrieve
Conditions on the water
Estimate
Wind
Moderate breeze
W 23 km/h
N
W
from the west
Wave40 cm chop
Water temp11.9°C
Air temp13°C
CloudClear
Pressure1010 hPa
Rain · recent0.0 mm

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

Head to
Wind driftW wind
Eastern end

A westerly has held for 6 hours at much the same temperature as the 12°C water. No thermal steer either way, but the drift still stacks food against the eastern end — the bank it is blowing into — so start there. This reads the upper water, though — a bottom bait at range feels it far less than a floater or a fish in the margins. Treat it as a tiebreaker between good swims rather than an override — features and angling pressure usually count for more.

How to fish it · for Trout
Where
Start with Perch Fry (8-10_long_shank) — on the point. If that does not produce, switch depth or speed before changing the pattern entirely.
The plan
Plan A

Start with Perch Fry (8-10_long_shank) — on the point. If that does not produce, switch depth or speed before changing the pattern entirely.

Plan B

If fish refuse the top team, swap the bob fly for a CDC emerger and fish a single dry slowly on a long leader.

Watch for

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

Bank

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

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 guilds as a supporter.

Start free trial

14-day free trial. Cancel anytime.

Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 5 as a supporter.

Start free trial

14-day free trial. Cancel anytime.

Through the year
0–3 scale · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
Reservoir BuzzerHatch
2
3
3
3
3
3
2
Daphnia SwarmHatch
2
3
3
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
Trout fly box
What's coming
Plan ahead
5-day outlook
Condition match
50%
Cloud25%
Wind30%
Temp100%

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

Fishing better nearby · 5
Gallery · 2
  1. View across Bohernabreena Reservoir surrounded by forested hills in the Dublin Mountains.
    Bohernabreena Reservoir in the Dublin Mountains, Co. Dublin.
  2. Terrain map of the venue
    Terrain map
About this water

Two reservoirs sitting in the Glenasmole valley south of Dublin, near enough to the city to be a surprise. The lower is stocked each year and holds the better fish, averaging just over half a pound with the odd one to four and a half; the upper is larger, its trout smaller but more plentiful. Fly-only, by Ministerial order, which spares you any agonising over method. Dublin City Council manages the fishery — you need a permit, or membership of the Dublin Trout Anglers or the Dodder Anglers.

Hatches & food

Upland Dublin-mountain reservoirs in a limestone valley but fed by acidic moorland — chironomid buzzer, midges and terrestrials dominate, with sparse lake olive and a useful summer sedge for the stocked and small wild trout.

  • Reservoir
  • Limestone
Water quality (WFD)
  • Ecology: Unknown
  • Chemical: Unknown
Why this score
  • Wind conditions (windy) are not ideal for this water.
  • Temperature (cool) is in the sweet spot for autumn fishing.
  • Lake Olive is in its seasonal window, boosting the chance of targeted feeding.
  • Reservoirs of this kind fish hard at this time of year.
Directions
Seasons & zones
  • Trout 1 March → 30 September
Related guides
Casting instructors near here
Booking & contacts