Spate · Slate · Asturias, Spain

Río Negro

Río Negro fishing venue photo
Today · Closed season
Black Gnat
Forecast · Today
Closed season
Out of season. Plenty of other water available now.
75% projected
Today's fly
Black Gnat
Black Gnat
Conditions on the water · Today
Live gauge
Level
Steady
1.18 m
Water temp17.9°C
ClarityClear
Weather19°C
WindN 18 km/h
Pressure1019 hPa
Rain · recent5.3 mm
Rain · ahead0.0 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
18°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 21°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 12pm

12pm(now) — Heather Fly

Stage: Terrestrials on topApproach: Dry flyActivity: 95%
Also:Reed Smut57%Cinnamon Sedge37%Autumn Dun22%
Peak emergence windowWeather boost10 food groups active

Peak activity at 12pm — Heather Fly (Heather Fly, Peak emergence window)

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 3 guilds with Pro.

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Beyond the hatch · worth watchingambient prey(1)

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
Late March BrownHatch
2
3
2
Large Brook DunHatch
2
3
2
Large StoneflyHatch
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
Luarca · 1.1 kmC&R trout
C&R trout stretch — Polideportivo de Luarca to Frente a los Alsas, rampa al río.
Beat detail
Daily permit required, all fish returned
Upstream: Polideportivo de Luarca
Downstream: Frente a los Alsas, rampa al río
Luarca beat map
Permits & access
Free state water
State rod licence required for trout / salmon as applicable.
  • Se requiere licencia de pesca asturiana
  • En 2026 muchas aguas trucheras llegan hasta el 15 de agosto, pero las zonas de salmón, las zonas de montaña, los tramos sin muerte y los tramos fronterizos pueden variar
  • Comprueba las normas locales del coto y del tramo antes de pescar.
What's coming
Plan ahead
5-day outlook
Cooler water nearby · 1
Water here around 21°C — probably warm enough to stress Brown Trout . These are likely cooler.
El Arenero (Coto Intensivo, Tineo)
12 km
~20°C
Brown trout · Rainbow trout
Gallery · 3
  1. In the heart of Luarca
    In the heart of Luarca
  2. In the heart of Luarca
    In the heart of Luarca
  3. Terrain map of the venue
    Terrain map
Water quality (WFD)
  • Ecology: Good
  • Chemical: Good
What this classification means

WFD re-coded 2026-06-18: prior id ES018MSPFES197MAR001750 actually identifies the Navelgas/Bárcena — this river was mis-tagged to a neighbouring water body. Re-mapped to ES018MSPFES159MAR001190. Status: EEA WISE 2022 (3rd RBMP). Confidence: medium — VERIFY Negro River I (001190) vs II (001800). Source: discodata.eea.europa.eu.

WFD classification · ES018MSPFES159MAR001190

The full read · show the working · for Brown Trout · confidence 80%
How the 0 is built — score × weight = contribution
Temperature5 × 28%1.4
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time55 × 13%7.2
Pressure80 × 7%5.6
Insect activity63 × 12%7.6
Limiting factor: Water temperature (21°C) is outside Brown Trout's preferred range (10–16°C)= 57
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.
Directions
Apple MapsGoogle Maps
Seasons & zones

Sea trout: Variable seasonal (2026)

Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts