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.
- Slate
Rules at a glance
- Free fishing
- Fly only
A good day — worth the effort
Low and clear — careful approach country. Small and bright, long leader, careful approach.
75% confidence in this read
Live now
Conditions on the water
Trends shown where the gauge supports them
Level
Dry recently
No gauge reading
Water temp
7.2°C
Estimated
Clarity
Clear
Air temp
10°C
Wind
S 9 km/h
Light breeze
Pressure
1018 hPa
Rain · 48h
1.3 mm
No meaningful rain
Rain · ahead
3.9 mm
Light rain · next 48h
Live readings — water temperature is an estimate where the gauge does not record it.
How to fish · for sea trout
The brief
When · where · method · kit
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
Good conditions. Clarity is favourable (85), Prey activity is weakest (33). ⏰ Sea trout become most active after dark, but this stretch closes at 20:21 — before that window fully opens. Fish hard in the last legal hour: overcast skies and warm evenings can bring fish on early even in fading light.
Hatches & runs
What's on, when
Twelve months at a glance
Through the year
0–3 scale · May 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.
Today's fly · curated pack
Top pattern + the box
6 patterns from this venue's curated pack
Detail · next 12h
Water temperature & rain
The two readings most likely to move the verdict
Water temperature for sea trout
Cool — slow7°C est.ideal 8–15°C
0°14°28°
Evidence
Why today scores what it does
6 factors, signed
- Temperature7728% weight
- Flow8022% weight
- Clarity8518% weight
- Feeding Time5013% weight
- Pressure857% weight
- Prey Activity3312% weight
About this water
Río Masma, end to end
Field guide · contributor-editedRío Masma · about
What this water is
Background · character · contributors
About this water
Río Masma · directions
How to get to the water
Directions
Río Masma · zones
Where the rules change
Seasons · zones · per-species rules
Seasons & zones
- Sea trout1 May → 31 July
- Trout1 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.
Río Masma · permits
Licences, sorteo, the rules
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.
Río Masma
Google Places
North Galician river reaching the sea near Foz.
Species
A good day — worth the effort
Low and clear — careful approach country. Small and bright, long leader, careful approach.
75% confidence in this read
Water temperature for sea trout
Cool — slow7°C est.ideal 8–15°C
0°14°28°
Why this score · for sea trout
- Temperature7728% weight
- Flow8022% weight
- Clarity8518% weight
- Feeding Time5013% weight
- Pressure857% weight
- Prey Activity3312% weight
Conditions
Level
Dry recently
No gauge reading
Water temp
7.2°C
Estimated
Clarity
Clear
Air temp
10°C
Wind
S 9 km/h
Light breeze
Pressure
1018 hPa
Rain · 48h
1.3 mm
No meaningful rain
Rain · ahead
3.9 mm
Light rain · next 48h
Live readings — water temperature is an estimate where the gauge does not record it.
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
Good conditions. Clarity is favourable (85), Prey activity is weakest (33). ⏰ Sea trout become most active after dark, but this stretch closes at 20:21 — before that window fully opens. Fish hard in the last legal hour: overcast skies and warm evenings can bring fish on early even in fading light.
Through the year
0–3 scale · May 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.
Gallery · 1
Terrain map
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.
Directions
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.
- Slate
Seasons & zones
- Sea trout1 May → 31 July
- Trout1 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.
Other water nearby · 5
Booking & contacts