Spate · Granite · Galicia (A Coruña

Río Mero

Río Mero — Rio Mero Cambre 6373alhdzwGL

An A Coruña sea-trout river falling east-to-west from the Sierra de Domaio through Abegondo to the Ría de Betanzos.

Poor · Brown Trout
Klinkhammer · 14-18
Poorlive now
Not the day for it
River temperature is the limiting factor today, not the flow. This is not the day to push it. Check the thermal advice above before you head out.
80% confidence
What moved it
  • Level1.03 mLast reading 17h ago
  • Water temp21.3°C
  • ClarityClear
Today's fly
Klinkhammer
Klinkhammer14-18
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
1.03 m
Last reading 17h ago
Water temp21.3°C
ClarityClear
Weather22°C
WindN 17 km/h
Pressure1018 hPa
Rain · recent0.0 mm
Rain · ahead4.4 mm

Live readings — water temperature is an estimate where the gauge does not record it.

Water temperature for Brown Trout
Warm — slow
21°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 21.3°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots.
Sub-surface · on the nymphunder the surface

Hatch predictions

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Beyond the hatch · worth watchingambient prey

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Evidence
Records-basedModerate confidence

Based on species-occurrence records, not local invertebrate surveys.

Through the year
0–3 scale · July 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 licence required
  • Betanzos coto allocation on the lower beats.
What's coming
Plan ahead
5-day outlook
Water here around 21°C. Nothing cooler within range — carry a thermometer.
Gallery · 2
  1. Río Mero — Rio Mero Cambre 6373alhdzwGL
    Rio Mero Cambre 6373alhdzwGL
  2. Terrain map of the venue
    Terrain map
About this water

An A Coruña sea-trout river falling east-to-west from the Sierra de Domaio through Abegondo to the Ría de Betanzos. The Mero is granite freestone water through the middle reaches around Cambre, with the lower river joining the parallel Mendo at Betanzos. Wild brown trout throughout; reo running into the lower river around Cambre and Betanzos from July onwards.

  • Granite
The full read · show the working · for Brown Trout · confidence 80%
How the 19 is built — score × weight = contribution
Temperature11 × 28%3.1
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity45 × 12%5.4
Limiting factor: Water temperature (21.3°C) is outside Brown Trout's preferred range (10–16°C)= 58
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Sea trout1 May → 31 July
  • Trout1 May → 31 July
Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts