Spate · Mixed · Asturias, Spain

Río Nonaya

Río Nonaya — Río Nonaya, Salas, Asturias

The Nonaya meets the Narcea near Cornellana, smaller and quieter than the famous river it joins.

Poor · Brown Trout
Ignita CDC · 16-20
Closed season
Out of season. Plenty of other water available now.
Closed — confidence not applicable today.
What moved it
  • Level0.49 m
  • Water temp18.7°C
  • ClarityClear
Today's fly
IC
Ignita CDC16-20
Upstream dry, on top
Conditions on the water
Live gauge
Level
Steady
0.49 m
lowspate
Water temp18.7°C
ClarityClear
Weather19°C
WindNE 6 km/h
Pressure1019 hPa
Rain · recent0.0 mm
Rain · ahead6.2 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Brown Trout
Warm — slow
19°C est.ideal 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 18.7°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots.
Hatch timeline · todayPeak at 6am

Hatch predictions

Today's headline hatch shown — see all 2 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

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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
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.

Ranked for today
Brown Trout fly box
Beats · 1
Cornellana · 1.7 kmC&R trout
C&R trout stretch — Curva del Corro del Charco to Río Narcea.
Beat detail
Daily permit required, all fish returned
Upstream: Curva del Corro del Charco
Downstream: Río Narcea
Cornellana beat map
Permits & access
Free state water
State rod licence required for trout / salmon as applicable.
  • Asturian fishing licence required
  • Proximity to Narcea salmon cotos — check beat boundaries.
What's coming
Plan ahead
5-day outlook
Water here around 19°C. Nothing cooler within range — carry a thermometer.
Gallery · 2
  1. Río Nonaya — Río Nonaya, Salas, Asturias
    Río Nonaya, Salas, Asturias
  2. Terrain map of the venue
    Terrain map
About this water

The Nonaya meets the Narcea near Cornellana, smaller and quieter than the famous river it joins. Fishing it feels like stepping off a busy road into a field — the same countryside, a different pace. Wild browns in clear water, the kind of tributary that the Narcea angler passes on the way to their beat and occasionally wishes they'd stopped at instead.

Under the surface

The Nonaya is a smaller tributary in the Nalón system, slate-fed and spate-responsive. The upper reaches show pure slate character in step-pool confines; the descent is rapid. The water remains amber-toned throughout. The Nonaya maintains its steep spate character throughout its reach. The available pools are secondary to the river's responsive descent. The wading demands respect throughout.

Wading: Wet quartzite slabs in gorge reaches

Hatches & food

In the mountain-to-sea trout rivers of Asturias, olives and other mayflies do much of the work in spring whenever levels and colour allow, followed by strong evening caddis and steady buzzer life through early and mid-summer, with terrestrials and mixed surface food from wooded, pastoral banks rounding out the diet whenever flows drop back into safe wading range.

  • Mixed
  • Step pool
  • Plane bed
The full read · show the working · for Brown Trout · confidence 80%
How the 0 is built — score × weight = contribution
Temperature44 × 28%12.3
Flow40 × 22%8.8
Clarity95 × 18%17.1
Feeding Time40 × 13%5.2
Pressure80 × 7%5.6
Insect activity41 × 12%4.9
Conditions total= 54
Can you trust it?
Water temperatureair-to-water estimateestimated
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
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