Spate · Mixed · East / Wicklow

Derry Water

Derry Water terrain map
Terrain map

The Derry Water is the eastern headwater of the Aughrim River — a small Wicklow upland stream that meets the Ow at Aughrim village to form the Aughrim.

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 Activity3312% weight
Conditions
Level
Dry recently
No gauge reading
Water temp
6.3°C
Estimated
Clarity
Clear
Air temp
7°C
Wind
W 18 km/h
Gentle breeze
Pressure
1008 hPa
Rain · 48h
0.0 mm
No meaningful rain
Rain · ahead
25.6 mm
Heavy 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 (33).
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
March BrownHatch
2
3
2
GrannomHatch
2
2
Large StoneflyHatch
2
3
2
Yellow SallyHatch
2
3
2

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

Directions
About this water

The Derry Water is the eastern headwater of the Aughrim River — a small Wicklow upland stream that meets the Ow at Aughrim village to form the Aughrim. Granite and mixed geology, small wild brown trout averaging six ounces, the river is heavily overgrown and rarely fished outside the small local circle. The Aughrim & District Trout Angling & Conservation Club tickets it together with the Ow and the lower Aughrim — three named waters, one connected system.

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