Lowland · Mixed · Co. Armagh / Lough Neagh Tributaries

River Blackwater (NI)

River Blackwater (NI) terrain map
Terrain map

The Blackwater is a major Lough Neagh tributary flowing through Co.

Species

A side-water session, not the main event

Low and clear — careful approach country. Long leader, small flies, slower casts.

75% confidence in this read
Water temperature for brown trout
Cool — slow
6°C est.ideal 1016°C
0°14°28°
Why this score · for brown trout
  • Temperature3928% weight
  • Flow6022% weight
  • Clarity9518% weight
  • Feeding Time5013% weight
  • Pressure807% weight
  • Prey Activity2712% weight
Conditions
Level
Dry recently
No gauge reading
Water temp
6.3°C
Estimated
Clarity
Clear
Air temp
7°C
Wind
W 19 km/h
Gentle breeze
Pressure
1005 hPa
Rain · 48h
0.0 mm
No meaningful rain
Rain · ahead
14.3 mm
Moderate rain · next 48h

Live readings — water temperature is an estimate where the gauge does not record it.

How to fish it · for brown trout
When
Nymphing can work through most of the day.
Where
Cover mixed depths.
Method
Start with tight-line nymphs and adjust if fish rise or drift higher.
Kit
9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.
Why this works
Fair conditions. Clarity is favourable (95), Prey activity is weakest (27).
Through the year
0–3 scale · May highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
Terrestrial BeetlesHatch
2
3
3
2
Blue Winged OliveHatch
1
2
2
2
2
1
Black MidgeHatch
1
2
2
2
2
2
2
2
2
2
2
1
Summer River MidgeHatch
1
2
2
2
1

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

Directions
About this water

The Blackwater is a major Lough Neagh tributary flowing through Co. Armagh — a slow, deep lowland river with excellent brown trout and dollaghan runs. The dollaghan run (July–October) is the main draw. Brown trout are plentiful throughout. The river also holds pike and some coarse fish. Managed by local clubs with day permits. The Blackwater responds slowly to rain — plan for sustained wet weather rather than single showers.

  • Mixed
Seasons & zones
  • Trout1 March → 30 September
Other water nearby · 5
Booking & contacts