Stillwater · Limestone · Midlands / Roscommon-Westmeath

Lough O'Flynn

Lough O'Flynn terrain map

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
Gosling · 8-10
Fairlive now
Good drifting conditions on Lough O'Flynn
Good wave on — drift country. A useful wave. Work the productive shore.
57% confidence

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

What moved it
  • WindSW 17 km/hGentle breeze
Today's fly
Gosling
Gosling8-10
High-confidence seasonal pick
Conditions on the water
Live gauge
Wind
Gentle breeze
SW 17 km/h
N
SW
from the south-west
Wave20 cm ripple
Water temp—
Air temp20°C
CloudBroken
Pressure1020 hPa
Rain · recent0.0 mm

Some readings unavailable — check directly before fishing.

Stale water· 0.7 mm in 48h

Little recent rain — fresh fish runs unlikely. Focus on resident fish and established lies.

How to fish it · for Trout
Where
Set up a broadside drift and cover the water systematically. Work Bibio on the bob and Murrough on the point.
The plan
Plan A

Set up a broadside drift and cover the water systematically. Work Bibio on the bob and Murrough 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

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

Boat — drift

A gentle ripple is ideal for drifting — broadside drift covering the wind lanes should be productive.

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 guilds with Pro.

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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
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
Trout fly box
What's coming
Plan ahead
5-day outlook
Condition match
74%
Cloud100%
Wind65%
Temp60%

A good match for Lough O'Flynn — most conditions are close to what it fishes best in.

Other water nearby · 5
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
Shannon (Upper)
44 km
Brown trout
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
  • Cloud cover (cloud) suits the fishery well.
  • 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