Upper Mondego rising in the Serra da Estrela flows through mountain water with wild brown trout. The upper basin above Nelas has the best fly fishing. Spring and early summer are the working months before heat arrives.
- Granite
Rules at a glance
- Free fishing
- Fly only
A side-water session, not the main event
Low and clear — careful approach country. Long leader, small flies, slower casts.
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
7.8°C
Estimated
Clarity
Clear
Air temp
9°C
Wind
S 9 km/h
Light breeze
Pressure
1019 hPa
Rain · 48h
0.0 mm
No meaningful rain
Rain · ahead
0.6 mm
No meaningful rain · next 48h
Live readings — water temperature is an estimate where the gauge does not record it.
How to fish · for brown trout
The brief
When · where · method · kit
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
Good conditions. Clarity is favourable (95), Prey activity is weakest (31).
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
Trout seasonSeason
1
2
2
2
1
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Today's fly · curated pack
Top pattern + the box
4 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 brown trout
Cool — slow8°C est.ideal 10–16°C
0°14°28°
Evidence
Why today scores what it does
6 factors, signed
- Temperature6228% weight
- Flow6022% weight
- Clarity9518% weight
- Feeding Time4513% weight
- Pressure807% weight
- Prey Activity3112% weight
About this water
Mondego (Upper Basin), end to end
Field guide · contributor-editedMondego (Upper Basin) · about
What this water is
Background · character · contributors
About this water
Mondego (Upper Basin) · directions
How to get to the water
Directions
Mondego (Upper Basin) · zones
Where the rules change
Seasons · zones · per-species rules
Seasons & zones
- Trout1 March → 31 July
Mondego (Upper Basin) · permits
Licences, sorteo, the rules
Permits & access
Permit required — see local rules.
- Licença de Pesca Desportiva (Portuguese fishing license)
- Regional variation; consult local authorities.
Mondego (Upper Basin)
Terrain map
Upper Mondego rising in the Serra da Estrela flows through mountain water with wild brown trout.
Species
A side-water session, not the main event
Low and clear — careful approach country. Long leader, small flies, slower casts.
75% confidence in this read
Water temperature for brown trout
Cool — slow8°C est.ideal 10–16°C
0°14°28°
Why this score · for brown trout
- Temperature6228% weight
- Flow6022% weight
- Clarity9518% weight
- Feeding Time4513% weight
- Pressure807% weight
- Prey Activity3112% weight
Conditions
Level
Dry recently
No gauge reading
Water temp
7.8°C
Estimated
Clarity
Clear
Air temp
9°C
Wind
S 9 km/h
Light breeze
Pressure
1019 hPa
Rain · 48h
0.0 mm
No meaningful rain
Rain · ahead
0.6 mm
No meaningful rain · next 48h
Live readings — water temperature is an estimate where the gauge does not record it.
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
Good conditions. Clarity is favourable (95), Prey activity is weakest (31).
Through the year
0–3 scale · May highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
1
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Permits & access
Permit required — see local rules.
- Licença de Pesca Desportiva (Portuguese fishing license)
- Regional variation; consult local authorities.
Directions
About this water
Upper Mondego rising in the Serra da Estrela flows through mountain water with wild brown trout. The upper basin above Nelas has the best fly fishing. Spring and early summer are the working months before heat arrives.
- Granite
Seasons & zones
- Trout1 March → 31 July
Other water nearby · 3
Booking & contacts