Freestone · Mixed · Stirlingshire

Allan Water

Photo of Allan Water

The Allan runs off the Ochils and joins the Forth near Bridge of Allan, and for its modest size it is one of the most productive little trout rivers in the Central Belt.

Poor · Brown Trout
Elk Hair Caddis · 12-16
Poorlive now
Not the day for it
River temperature is the limiting factor today, not the flow. This is not the day to push it. Check the thermal advice above before you head out.
90% confidence
What moved it
  • Level0.37 mLast reading 4h ago
  • Water temp23.0°C
  • ClarityClear
Today's fly
Elk Hair Caddis
Elk Hair Caddis12-16
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.37 m
Last reading 4h ago
Water temp23.0°C
ClarityClear
Weather18°C
WindW 20 km/h
Pressure1017 hPa
Rain · recent0.3 mm
Rain · ahead2.0 mm

Live readings only. Trends shown where the gauge supports them.

Water temperature for Brown Trout
Warm — slow
23.0°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
Water at 23°C. This is the line where catch-and-release kills brown trout. Do not fish for them today.
Hatch timeline · todayPeak at 6am

Hatch predictions

Today's headline hatch shown — see all 7 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

See the full sub-surface read with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 2 with Pro.

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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 · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
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

A balanced Scottish river profile. Early season nymphs and spiders, then more dry-fly and emerger fishing as hatches strengthen on steadier glides and richer water.

What's coming
Plan ahead
5-day outlook
Cooler water nearby · 2
Water here at 23.0°C — too warm to fish Brown Trout safely. These are cooler.
Gallery · 2
  1. Photo of Allan Water
    Allan Water — image via Wikipedia (Allan Water)
  2. Terrain map of the venue
    Terrain map
About this water

The Allan runs off the Ochils and joins the Forth near Bridge of Allan, and for its modest size it is one of the most productive little trout rivers in the Central Belt. It carries a proper Lowland insect population — big dark olives in March, medium olives through May, caddis in the evenings — and holds wild brown trout throughout. The banks are easy, the wading is straightforward, and the fishing is democratically priced through local clubs with day tickets. A couple of small sea trout run up from the Forth in summer but nobody fishes the Allan for them. You fish it for wild brown trout on spiders and dry fly, which is exactly what it asks of you.

  • Mixed
Water quality (WFD)
  • EcologyModerate
  • ChemicalUnknown
What this classification means

SEPA WFD 2022 — Allan Water: Moderate status. Corrected 2026-06-18 (was recorded Bad). Source: SEPA WFD 2022 classification (spatialdata.gov.scot / SEPA Aquatic Classification Hub).

SEPA (Scotland) · UKSC004601

The full read · show the working · for Brown Trout · confidence 90%
How the 4 is built — score × weight = contribution
Temperature2 × 28%0.6
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity57 × 12%6.8
Limiting factor: Water temperature (23°C) is outside Brown Trout's preferred range (10–16°C)= 56
Can you trust it?
Water temperaturelive gauge readinggauge
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
The dawn and dusk windows score higher than the midday lull.
Related guides
Casting instructors near here
Booking & contacts