Spate · Slate · Asturias, Spain

Río Negro

Río Negro fishing venue photo
Poor · Sea Trout
Black & Silver Tube · 1-2 inch
Poorlive now
Slow going — better windows ahead
River temperature is the limiting factor today, not the flow. The thermal advice above stands. Rest this water for the species today.
80% confidence
What moved it
  • Level1.18 mLast reading 5h ago
  • Water temp18.3°C
  • ClarityClear
Today's fly
BS
Black & Silver Tube1-2 inch
In deep pools and dark water, silhouette and contrast do the work colour cannot. A fly that reads as black against depth is enough. Fish it broadside, hold the swing, let it hang at the dangle — that is when the best fish take.
Conditions on the water
Live gauge
Level
Steady
1.18 m
Last reading 5h ago
Water temp18.3°C
ClarityClear
Weather18°C
WindNE 8 km/h
Pressure1020 hPa
Rain · recent0.0 mm
Rain · ahead6.6 mm

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

Water temperature for Sea Trout
Warm — slow
18°C est.ideal 8–15°C
0°14°28°
How to fish it · for Sea Trout
When
From dusk into the first half of the night.
Where
Deeper pools and slower glides · hold water and current seams.
Method
Fish dark patterns on a sink-tip or lightly sunk line, especially near structure.
Kit
10 ft #6/7 rod, floating line with a sink-tip option, 8–10 lb fluoro tippet for the swing.
Why this works
Water at 18.3°C — above the sea 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 5 active hatches hour by hour with Pro.

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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

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
Sea Trout fly box
BS
Black & Silver TubeTop
1-2 inch · Tube
In deep pools and dark water, silhouette and contrast do the work colour cannot. A fly that reads as black against depth is enough. Fish it broadside, hold the swing, let it hang at the dangle — that is when the best fish take.
SF
Snake Fly (Black)
2-4 inch · Streamer
A mobile eel-like profile that undulates through deep pools — effective when sea trout are lying deep and not responding to conventional wets.
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.
  • Asturian fishing licence required
  • In 2026 many trout waters run to 15 August, but salmon zones, mountain zones, tramos sin muerte, and border stretches can differ
  • Check local coto and tramo rules before fishing.
What's coming
Plan ahead
5-day outlook
Water here around 18°C. Nothing cooler within range — carry a thermometer.
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

Why this score · for Sea Trout
  • Temperature1228% weight
  • Flow8022% weight
  • Clarity8518% weight
  • Feeding Time5013% weight
  • Pressure857% weight
  • Insect activity5612% weight
Directions
Apple MapsGoogle Maps
Seasons & zones

Sea trout: Variable seasonal (2026)

Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts