Limestone · North West / Sligo-Roscommon, IE

Lough Arrow

Aerial view of Lough Arrow, County Sligo, the full breadth of the limestone lough ringed by farmland.

Reckoned among the finest limestone loughs in the country, and shallow, clear water that seems to put every insect on display before the trout even gets to it.

Closed season · Trout
Perch Fry · 8–10 long shank
Closed season
Season reopens 1 April. Try elsewhere.
Closed — confidence not applicable today.
What moved it
  • WindSW 8 km/hLight breeze · Gusts to 11 km/h
Today's fly
Perch Fry
Perch Fry8–10 long shank
Retrieve
Conditions on the water
Estimate
Wind
Light breeze · Gusts to 11 km/h
SW 8 km/h
N
SW
from the south-west
WaveRipple
Water temp9.2°C
Air temp6°C
CloudOvercast
Pressure—
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
Mayfly mid-May through early June is what you plan the year around. Evening sedge through July on warm calm nights. Clear water means accurate casting matters more here than wind handling.
Where
Shallower bays and rocky points where food concentrates. Arrow is small enough to fish bay-to-bay in a session — the south end and the western shore reward time.
Method
Drift the shallows in light wave with team wets. Switch to single dry — spent drake or Grey Wulff — when fish settle on the mayfly. Evening sedge: cast tight to weed margins.
Kit
10 ft #6 boat rod, floating line, 4 to 5 lb fluoro — the clarity wants finer tippet than Mask. 12 ft tapered leader.
The plan
Plan A

Set up a broadside drift and cover the water systematically. Work Perch Fry on the bob and Minkie 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 — 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 as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 4 as a supporter.

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Through the year
0–3 scale · November highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
1
Green PeterHatch
2
3
2
Murrough (Great Red Sedge)Hatch
2
3
2
DuckflyHatch
2
2
Mayfly (Green Drake)Hatch
2
2

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

Buzzer team todayfor the conditions now
Point
Black buzzer, orange thorax
Not in this water's box
#10
How to fish it
Intermediate line · let the breeze drift the team, then hang it 15–30 s

Fly recommendations

Point fly shown — supporters see the whole team, sizes and why.

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Ranked for today
Trout fly box
Permits & access
Free state water
State rod licence required for trout / salmon as applicable.
  • No permit — state rod licence only
  • Boats available
  • A guide who knows how to handle the boat and where to look for fish is worth every penny — the lough has moods and hazards that locals know
  • C&R strongly encouraged.
What's coming
Plan ahead
5-day outlook
Condition match
51%
Cloud70%
Wind30%
Temp60%

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

Other water nearby · 5
Gallery · 5
  1. Aerial view of Lough Arrow, County Sligo, the full breadth of the limestone lough ringed by farmland.
    Lough Arrow from the air
  2. Ballindoon Priory ruins with Lough Arrow stretching behind, County Sligo.
    Ballindoon Priory and Lough Arrow
  3. Open water view across Lough Arrow, County Sligo.
    Lough Arrow
  4. Fishing boats moored on Lough Arrow in golden morning light.
    Boats on Lough Arrow
  5. Terrain map of the venue
    Terrain map
About this water

Mayfly and olive hatches are exceptional, and the wild browns run to specimen size — fish that test the nerve as much as the skill. The surrounding hills give it more shelter than most loughs its size, so it goes on fishing through a moderate breeze that would shut down more exposed water. The mayfly from the middle of May is worth building the year's calendar around.

Hatches & food

Duckfly typically start in mid-April and run for about three weeks, best in the evening from around 19:30, followed by a big lake-olive hatch over the weed through the first half of May. Ephemera danica mayfly usually run from early May into June across the lough and shore drifts, with a smaller Murrough (great red sedge) hatch around late May to early June bringing trout on from about 23:00. Caenis hatch heavily from mid-to-late June in calm sheltered bays at first light, and summer sedges carry the fishing from around 22:00 through June to August.

  • Lough system
  • Limestone
Water quality (WFD)
  • Ecology: Good
  • Chemical: Unknown
What this classification means

WFD code normalized 2026-06-18: IE_WE_35_159 → IEWE_35_159 (EPA national format → EEA WISE euSurfaceWaterBodyCode; same water body, now joinable to WISE). Status confirmed against EEA WISE 2022 (3rd RBMP). Source: discodata.eea.europa.eu. | Prior note: EPA WFD 2019-2024 (lake layer) — Lough Arrow: Good ecological status. Re-tagged 2026-06-18 from IESH_26F020400 (a river/stream water body, not the lough) to the lough's own EPA lake water body. Source: EPA Ireland WFD 2019-2024 classification (catchments.ie / EDEN).

EPA (Ireland) · IEWE_35_159

Why this score
  • Wind conditions (ripple) are not ideal for this water.
Directions
Seasons & zones
  • Trout 1 April → 30 September
Related guides
Casting instructors near here
Booking & contacts
Clubs & associations
  • Lough Arrow Anglers
    Members only: no day tickets, join the club to fish here
At a glance

Lough Arrow is a limestone river in North West / Sligo-Roscommon, Ireland. The catchment geology is recorded as limestone, and the water sits at about 58 m above sea level. The river is described as roughly 6 km long. The species listed for this water is brown trout. The trout season is recorded as running from 1 April to 30 September. Best window recorded for anglers: March–September; mayfly peak mid-May to early June. Core methods listed: loch-style wet fly drift from boat; dry fly during mayfly; dry sedge in evening. Its Water Framework Directive ecological status is recorded as good. Access is recorded as a lough where no permit is required. Boat fishing is recorded as available. Nearby waters in our listings include Lough na Leibe at 6.0 km, Lough Doon (Leitrim) at 25 km and Lough Rowan at 30 km.