Spate · Slate · A Mariña, Lugo, Galicia

Río Masma

Río Masma — Río Masma

North Galician river reaching the sea near Foz.

Poor · Brown Trout
Klinkhammer · 14-18
Closed season
Out of season. Plenty of other water available now.
Closed — confidence not applicable today.
What moved it
  • Level0.46 mDropping after lift
  • Water temp19.2°C
  • ClarityVery colouredColouring up
Today's fly
Klinkhammer
Klinkhammer14-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.46 m
Dropping after lift
Water temp19.2°C
ClarityVery coloured
Weather20°C
WindNE 21 km/h
Pressure1018 hPa
Rain · recent0.0 mm
Rain · ahead8.7 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 19.2°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 6pm

Hatch predictions

Today's headline hatch shown — see all 6 active hatches hour by hour with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

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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
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
Permits & access
Permit required — see local rules.
  • Galician fishing licence required
  • Check current Xunta rules, cotos and catch-and-release conditions before travel
  • Heritage salmon status does not mean salmon can be targeted.
What's coming
Plan ahead
5-day outlook
Water here around 19°C. Nothing cooler within range — carry a thermometer.
Gallery · 2
  1. Río Masma — Río Masma
    Río Masma
  2. Terrain map of the venue
    Terrain map
About this water

North Galician river reaching the sea near Foz. Known now mainly for trout and sea trout on a heritage salmon system where salmon stocks are fragile, depleted and out of bounds. Classic A Mariña spate behaviour still shapes the fishing.

Hatches & food

In Galicia's Atlantic trout rivers, resident browns feed through a spring build-up of olives and other up-wings into a long summer of caddis and small buzzers, with frequent spates and cool water keeping fish active; terrestrials from lush banks and meadows become important once levels settle and the banks green up.

  • Slate
The full read · show the working · for Brown Trout · confidence 80%
How the 0 is built — score × weight = contribution
Temperature36 × 28%10.1
Flow80 × 22%17.6
Clarity15 × 18%2.7
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity49 × 12%5.9
Limiting factor: Water is very coloured — too coloured for Brown Trout= 51
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.
A drop and clear would lift the flow and clarity scores.
Directions
Seasons & zones
  • Sea trout 1 May31 July
  • Trout 1 May31 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.

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