Spate · Slate · A Mariña, Lugo, Galicia

Río Masma

Río Masma — Río Masma
Today · Closed season
Black Gnat
Forecast · Today
Closed season
Out of season. Plenty of other water available now.
80% projected
Today's fly
Black Gnat
Black Gnat
Conditions on the water · Today
Live gauge
Level
Rising
0.48 m
Lifting fast
Water temp18.3°C
ClarityUnfishable
Weather19°C
WindN 26 km/h
Pressure1018 hPa
Rain · recent5.0 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.
Hatch timeline · todayPeak at 12pm

12pm(now) — Heather Fly

Stage: Terrestrials on topApproach: Dry flyActivity: 63%
Also:Daddy Long Legs23%
Peak emergence windowWeather boost5 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
Sea trout runRun
1
2
1
Trout seasonSeason
1
2
1
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
Permits & access
Permit required — see local rules.
  • Se requiere licencia de pesca gallega
  • Consulta las normas vigentes de la Xunta, los cotos y las condiciones de captura y suelta antes de desplazarte
  • El estatus histórico de salmón no significa que pueda ser pescado como objetivo.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Río Suarón
24 km
0
Brown trout
Río Eo
29 km
0
Brown trout · Sea trout · Salmon
Río Ouro
10 km
Brown trout
Río Landro
31 km
Brown trout · Sea trout
Río Porcía
41 km
Brown trout · Sea trout
Gallery · 2
  1. Río Masma — Río Masma
    Río Masma
  2. Terrain map of the venue
    Terrain map
The full read · show the working · for Brown Trout · confidence 75%
How the 0 is built — score × weight = contribution
Temperature59 × 28%16.5
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time50 × 13%6.5
Pressure80 × 7%5.6
Insect activity61 × 12%7.3
Conditions total= 71
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 1 May → 31 July
  • Trout 1 May → 31 July

Sea trout: Variable seasonal (2026) — Río Masma — small Galician river. Reo present in lower reaches; salmon prohibited 2026. Sea trout fishing is opportunistic and condition-dependent on this small system.

Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts