Limestone · East / Meath

Athboy–Tremblestown River

Athboy venue image
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The Athboy runs some twenty-two miles across Meath, through the town and on to join the Boyne above Trim.

Marginal · Brown Trout
Pheasant Tail Nymph · 14-18
Marginallive now
Slow going — pick your moments
River dropping into shape after a lift. A short window. Take your time.
55% confidence
What moved it
  • LevelProxyvia Kells Blackwater
  • Water temp12.2°C
  • ClarityVery colouredColouring up
Today’s fly
Pheasant Tail Nymph
Pheasant Tail Nymph14-18
Upstream
Conditions on the water
Proxy gauge
Level
Steady
Proxy
via Kells Blackwater
Water temp12.2°C
ClarityVery coloured
Weather27°C
WindE 23 km/h
Pressure1014 hPa
Rain · recent0.0 mm
Rain · ahead3.3 mm

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

Water temperature for brown trout
Ideal
12.2°Cideal 1016°C
0°14°28°
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
Poor — water temperature is working for you, but water clarity is the limiting factor today.
Hatch timeline · todayPeak at 2pm

Hatch predictions

Today's headline hatch shown — see all 12 active hatches hour by hour with Pro.

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Through the year
0–3 scale · June highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
1
Daddy Long LegsHatch
2
3
2
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1

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

Ranked for today
Brown Trout fly box
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

The Athboy runs some twenty-two miles across Meath, through the town and on to join the Boyne above Trim. The banks are high — chest waders are not optional here — but the reward is a good head of wild brown trout to three-quarters of a pound, with the odd better fish over the pound to keep you honest. Mind the short season: it opens on 1 April and closes on 15 September. Trim, Athboy & District Angling Association controls the water below the town and runs it catch-and-release.

  • Limestone
The full read · show the working · for brown trout · confidence 55%
How the 30 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity15 × 18%2.7
Feeding Time55 × 13%7.2
Pressure80 × 7%5.6
Insect activity49 × 12%5.9
Limiting factor: Water is very coloured — too coloured for Brown Trout= 67
Can you trust it?
Water temperaturelive gauge readinggauge
Level / flowproxy via Kells Blackwaterproxy
What would change the calculation
A drop and clear would lift the flow and clarity scores.
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
  • Trout1 April → 15 September
Related guides
Booking & contacts