Freestone · Mixed · East Jutland

Lilleåen

Lilleåen terrain map
Terrain map

A Gudenå tributary singled out by Riverfisher as the place for really big sea trout in the system.

Marginal · Brown Trout
Pheasant Tail Nymph · 14-18
Marginallive now
Slow going — pick your moments
Low and clear — careful approach country. Cover and shadow are doing the work today.
80% confidence
What moved it
  • LevelDry recentlyNo gauge reading
  • Water temp18.7°C
  • ClarityClear
Today’s fly
Pheasant Tail Nymph
Pheasant Tail Nymph14-18
High-confidence seasonal pick
Conditions on the water
Estimate
Level
Dry recently
No gauge reading
Water temp18.7°C
ClarityClear
Weather24°C
WindW 5 km/h
Pressure1023 hPa
Rain · recent0.0 mm
Rain · ahead5.3 mm

No gauge on this water — readings are regional estimates from weather, not a live gauge.

Water temperature for brown trout
Warm — slow
19°C est.ideal 10–16°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 18.7°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots. Otherwise poor — water clarity is in the right range.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 8 active hatches hour by hour with Pro.

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Evidence
ModelledModerate confidence

Modelled from regional ecology — no survey or occurrence data for this water yet.

Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Sea trout runRun
1
2
2
2
2
2
2
2
1
Trout seasonSeason
1
2
2
2
2
2
2
2
1
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
1

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

Ranked for today
Brown Trout fly box
SW
Small wet fly (Ke-He style)
10-14 · Small wet fly
Proven pattern for this period
Permits & access
Permit required — see local rules.
  • Fisketegn + local association permit
  • Check current sea-trout protection rules in the Gudenå system carefully — parts of the system upstream of Lilleåen are currently closed to sea-trout fishing.
What's coming
Plan ahead
5-day outlook
Cooler water nearby · 2
Water here around 19°C — probably warm enough to stress brown trout. These are likely cooler.
Simested Å
54 km
~14°C
Brown trout · Sea trout
Gudenå
34 km
~18°C
Brown trout · Salmon · Sea trout
About this water

A Gudenå tributary singled out by Riverfisher as the place for really big sea trout in the system. Not a famous headline river in its own right, but it matters precisely because the Gudenå sea-trout story points here. Small-scale water — intimate, manageable, and with the potential for a genuinely large migratory fish. Access is association-managed. Current protection rules for sea trout in parts of the Gudenå system upstream of Lilleåen mean rules must be checked carefully before fishing.

  • Mixed
The full read · show the working · for brown trout · confidence 80%
How the 36 is built — score × weight = contribution
Temperature44 × 28%12.3
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time65 × 13%8.5
Pressure80 × 7%5.6
Insect activity58 × 12%7.0
Conditions total= 68
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
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.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Sea trout1 March → 30 November
  • Trout1 March → 30 November
Related guides
Euro Nymphingsubsurface methods
Booking & contacts