Stillwater · Limestone · Midlands / Roscommon-Westmeath, IE

Lough O'Flynn

Lough O'Flynn - geograph.org.uk - 4482272

A 300-acre rich limestone lake in Roscommon, just north of Ballinlough, with wild and stocked brown trout averaging a pound and a half and fish to three or four pounds.

Fair · Trout
Perch Fry · 8-10_long_shank
Fairlive now
Buzzer expected on Lough O'Flynn
Useful ripple, fishable wave. Worth a session if the wind holds.
55% confidence

Lough O'Flynn is often best in spring through autumn.

What moved it
  • WindS 25 km/hModerate breeze
Today's fly
Perch Fry
Perch Fry8-10_long_shank
Retrieve
Conditions on the water
Estimate
Wind
Moderate breeze
S 25 km/h
N
S
from the south
Wave40 cm chop
Water temp11.4°C
Air temp13°C
CloudOvercast
Pressure1006 hPa
Rain · recent0.0 mm

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

Moderate freshness· 6 mm in 48h

Moderate rainfall (6mm) may bring some water movement. Watch for fish moving to new lies as water rises slightly.

How to fish it · for Trout
Where
Work Muddler Minnow on the bob and Perch Fry on the point.
The plan
Plan A

Work Muddler Minnow on the bob and Perch Fry on the point.

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

Keep an eye on changing conditions — wind shifts and cloud breaks can trigger short feeding spells.

Boat — at anchor

Windy conditions suit anchoring in productive areas rather than open-water drifting.

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
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
57%
Cloud50%
Wind30%
Temp100%

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

Fishing better nearby · 5
Shannon (Upper)
42 km
82
Brown trout
Lough na Leibe
36 km
Rainbow trout · Brown trout
Lough Arrow
38 km
Brown trout
Lough Carra
41 km
Brown trout
Rooskey Lough
41 km
Rainbow trout · Brown trout
Gallery · 2
  1. Lough O'Flynn - geograph.org.uk - 4482272
  2. Terrain map of the venue
    Terrain map
About this water

A 300-acre rich limestone lake in Roscommon, just north of Ballinlough, with wild and stocked brown trout averaging a pound and a half and fish to three or four pounds. It is renowned for its mayfly — prolific from mid-May into July — followed by a strong sedge season and dapping into the autumn. Midland Fisheries Group permit. The access is good for once, with a pier on the south shore.

Hatches & food

A rich limestone Roscommon lake renowned for prolific Mayfly (Ephemera danica) from mid-May into July, backed by duckfly and lake olive early and a strong sedge season — classic Irish limestone loch entomology.

  • Lough
  • 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.
  • Buzzer is in its seasonal window, boosting the chance of targeted feeding.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 1 March → 12 October
Related guides
Irish Loughs Playbooklough-style fishingSmall Stillwater Playbookstillwater tacticsThermal Layers & Troutreading depth and temperature
Casting instructors near here
Booking & contacts