ICNF salmonid classification includes the upper Cávado down to the Salamonde backwater. Scenic, trouty water with wild browns in granite bedrock. Spring is prime.
- Granite
Rules at a glance
- Public water
- Licence required
Water temperature for Brown Trout
Cool — slow5°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 · todayQuiet day
Low insect activity predicted today
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 3 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Evidence
Survey-backed · regionalHigh confidence
Backed by regional invertebrate surveys; no sampling on this exact reach yet.
Through the year
0–3 scale · November highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
1
Large Dark OliveHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Autumn OliveHatch
1
2
1
Brown SedgeHatch
1
2
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Brown Trout fly box
A wild brown trout pack for northern and mountain Portugal. River-first, compact, and practical, with nymphs leading and dry flies taking over in the stronger windows.
Permits & access
Permit required — see local rules.
- Licença de Pesca Desportiva (Portuguese fishing license)
- Regional variation; consult local authorities.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
Albufeira da Barragem do Alto Cávado - Portugal Terrain map
About this water
Water quality (WFD)
- Ecology: Good
- Chemical: Unknown
WFD classification · PT02CAV0075
The full read · show the working · for Brown Trout · confidence 40%
How the 0 is built — score × weight = contribution
Temperature28 × 28%7.8
Flow15 × 22%3.3
Clarity0 × 18%0.0
Feeding Time45 × 13%5.9
Pressure80 × 7%5.6
Insect activity50 × 12%6.0
Limiting factor: Water is unfishable — too coloured for Brown Trout= 29
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
Warmer water — toward the 10–16 °C ideal band — would lift the temperature score.
A drop and clear would lift the flow and clarity scores.
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
- Trout 1 March → 31 July
Related guides
Booking & contacts
Cávado (Upper / Gerês)
Upper Cávado flowing through the Gerês mountain area — classic northern mountain trout country.
Water temperature for Brown Trout
Cool — slow5°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 · todayQuiet day
Low insect activity predicted today
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 3 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Evidence
Survey-backed · regionalHigh confidence
Backed by regional invertebrate surveys; no sampling on this exact reach yet.
Through the year
0–3 scale · November highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
1
Large Dark OliveHatch
1
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Autumn OliveHatch
1
2
1
Brown SedgeHatch
1
2
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Brown Trout fly box
A wild brown trout pack for northern and mountain Portugal. River-first, compact, and practical, with nymphs leading and dry flies taking over in the stronger windows.
Permits & access
Permit required — see local rules.
- Licença de Pesca Desportiva (Portuguese fishing license)
- Regional variation; consult local authorities.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
Albufeira da Barragem do Alto Cávado - Portugal Terrain map
About this water
ICNF salmonid classification includes the upper Cávado down to the Salamonde backwater. Scenic, trouty water with wild browns in granite bedrock. Spring is prime.
- Granite
Water quality (WFD)
- Ecology: Good
- Chemical: Unknown
WFD classification · PT02CAV0075
The full read · show the working · for Brown Trout · confidence 40%
How the 0 is built — score × weight = contribution
Temperature28 × 28%7.8
Flow15 × 22%3.3
Clarity0 × 18%0.0
Feeding Time45 × 13%5.9
Pressure80 × 7%5.6
Insect activity50 × 12%6.0
Limiting factor: Water is unfishable — too coloured for Brown Trout= 29
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
Warmer water — toward the 10–16 °C ideal band — would lift the temperature score.
A drop and clear would lift the flow and clarity scores.
The dawn and dusk windows score higher than the midday lull.
Directions
Seasons & zones
- Trout 1 March → 31 July
Related guides
Booking & contacts
At a glance
Cávado (Upper / Gerês) is a freestone river in Norte / Braga / Gerês, Portugal. The catchment geology is recorded as granite, and the water sits at about 670 m above sea level. The species listed for this water is brown trout. The trout season is recorded as running from 1 March to 31 July. Best window recorded for anglers: Spring (March–May) and autumn (September–October); avoid hot summers. Core methods listed: Dry fly; Nymph; Wet fly. Its Water Framework Directive ecological status is recorded as good. Nearby waters in our listings include Venda Nova at 18 km, Alto Rabagão at 24 km and Vez at 27 km.