Spate · Granite · North West / Donegal, IE

Lackagh / Lough Beagh

View across Lough Beagh with heather-covered hills and rocky outcrops, Glenveagh National Park, County Donegal
Today · Closed season
Black Gnat
Forecast · Today
Closed season
Out of season. File this water for the right month.
70% projected
Today's fly
Black Gnat
Black Gnat
Conditions on the water · Today
Proxy gauge
Level
Steady
Proxy
via River Finn
Water temp15.2°C
ClarityClear
Weather14°C
WindN 34 km/h
Pressure998 hPa
Rain · recent6.9 mm
Rain · ahead1.2 mm

No gauge on this water — conditions are inferred from River Finn. The trend transfers, the absolute level does not.

Water temperature for Atlantic Salmon
Ideal
15°C est.ideal 10–16°C
0°14°28°
How to fish it · for Atlantic Salmon
When
All day is fishable. Peaks around mid-morning (10-12) and late afternoon (4-6pm). A change in light — cloud passing over the sun, or the first shadow reaching the water — can trigger a take.
Where
Fish the full pool systematically — start at the head, two steps between each cast, work through to the tail. Pay special attention to the classic taking lies: pool heads where current enters, tails where it shallows, and seams alongside faster water.
Method
Medium-paced swing, fly fishing just below the surface. Fish are willing to move — a steady broadside presentation across the current is ideal. Vary speed through the swing.. Floating line, possibly slow intermediate in deeper pools. Small-medium: size 8-12 doubles, small tubes. Fish are willing to move — let them come to the fly.
Kit
10 ft #7/8 single-hander, floating line, 10–12 lb fluoro leader. Boat seat and waterproofs for the drift.
Why this works
The river is in textbook shape. River dropping nicely into shape after a lift — textbook conditions. Clearing nicely — classic taking conditions. 12.1°C — in the ideal taking range for autumn salmon. This is the window experienced salmon anglers wait for — if you can get to the river, go now.
Likely species
Hatch timeline · todayPeak at 12:00

12:00(now) — Heather Fly

Stage: Terrestrials on topApproach: Dry flyActivity: 95%
Also:Daddy Long Legs68%Pond Olive57%Cinnamon Sedge30%
Peak emergence windowWeather boost12 food groups active

Peak activity at 12:00 — Heather Fly (Heather Fly, Peak emergence window)

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 5 as a supporter.

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Evidence
Survey-backed · regionalHigh confidence

Backed by regional invertebrate surveys; no sampling on this exact reach yet.

Through the year
0–3 scale · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Salmon runRun
1
2
2
1
Sea trout runRun
1
2
2
2
1
Heather FlyHatch
2
2
Daddy Long LegsHatch
2
3
2
Claret DunHatch
2
3
2
Murrough (Great Red Sedge)Hatch
2
3
2

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

Ranked for today
Fly box · Atlantic Salmon
Permits & access
Free state water
State rod licence required for trout / salmon as applicable.
  • Glenveagh National Park area, Co
  • Access arrangements — check locally
  • State rod licence required.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
  1. View across Lough Beagh with heather-covered hills and rocky outcrops, Glenveagh National Park, County Donegal
    Lough Beagh, Glenveagh National Park
  2. Terrain map of the venue
    Terrain map
Water quality (WFD)
  • Ecology: Good
  • Chemical: Unknown
What this classification means

WFD ecological status Moderate → Good corrected to EEA WISE 2022 (3rd RBMP) classification for waterbody IENW_38C010300. Source: EEA WISE SWB_SurfaceWaterBody (discodata.eea.europa.eu), verified 2026-06-18.

EPA (Ireland) · IENW_38C010300

The full read · show the working · for Atlantic Salmon · confidence 75%
How the river scores — hydrology factors
Water heightMedium Ideal+2.3
Recent riseNone0.0
Falling after liftDropping Nicely Into Shape+4.5
Water temperatureCool To Moderate+3.0
Time in seasonLate Season+0.5
ClarityClearing+2.4
Hydrology base12.7
Rules that fired
Clearing After Spate Bonus+1
Will they take?Willingcaps the band

Fish should be willing to take — clearing, stained water.

Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowproxy via River Finnproxy
What would change the calculation
No prolonged stable spell before the current rise.
Directions
Seasons & zones
  • Salmon 1 June → 30 SeptemberC&R
  • Sea trout 12 May → 30 September
Related guides
Casting instructors near here
Booking & contacts