Tributary of the Mondego near Coimbra with wild brown trout in mixed geology water that varies in clarity. Spate-dependent—fishes best after rain when levels are up. Dry fly and nymph work in spring and early summer.
- Mixed
Water temperature for brown trout
Warm — slow17°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
Good — water clarity is right today, though river flow could be better.
Hatch timeline · todayQuiet day
Hatch predictions
Today's headline hatch shown — see all 8 active hatches hour by hour with Pro.
Start free trial14-day free trial. Cancel anytime.
Evidence
ModelledModerate confidence
Modelled from regional ecology — no survey or occurrence data for this water yet.
Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
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.
- Licença de Pesca Desportiva (Portuguese fishing license)
- Regional variation; consult local authorities.
What's coming
Plan ahead
5-day outlook
Other water nearby · 3
Gallery · 1
Terrain map
About this water
Water quality (WFD)
- Ecology: Moderate
- Chemical: Unknown
What this classification means
WFD ecological status Good → Moderate corrected to EEA WISE 2022 (3rd RBMP) classification for waterbody PT04MON0678 (was a stale earlier-cycle value). Source: EEA WISE SWB_SurfaceWaterBody (discodata.eea.europa.eu), verified 2026-06-18.
WFD classification · PT04MON0678
The full read · show the working · for brown trout · confidence 90%
How the 71 is built — score × weight = contribution
Temperature68 × 28%19.0
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity61 × 12%7.3
Conditions total= 71
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
Seasons & zones
- Trout1 March → 31 July
Related guides
Booking & contacts
Ceira
Google Places
Tributary of the Mondego near Coimbra with wild brown trout in mixed geology water that varies in clarity.
Water temperature for brown trout
Warm — slow17°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
Good — water clarity is right today, though river flow could be better.
Hatch timeline · todayQuiet day
Hatch predictions
Today's headline hatch shown — see all 8 active hatches hour by hour with Pro.
Start free trial14-day free trial. Cancel anytime.
Evidence
ModelledModerate confidence
Modelled from regional ecology — no survey or occurrence data for this water yet.
Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
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.
- Licença de Pesca Desportiva (Portuguese fishing license)
- Regional variation; consult local authorities.
What's coming
Plan ahead
5-day outlook
Other water nearby · 3
Gallery · 1
Terrain map
About this water
Tributary of the Mondego near Coimbra with wild brown trout in mixed geology water that varies in clarity. Spate-dependent—fishes best after rain when levels are up. Dry fly and nymph work in spring and early summer.
- Mixed
Water quality (WFD)
- Ecology: Moderate
- Chemical: Unknown
What this classification means
WFD ecological status Good → Moderate corrected to EEA WISE 2022 (3rd RBMP) classification for waterbody PT04MON0678 (was a stale earlier-cycle value). Source: EEA WISE SWB_SurfaceWaterBody (discodata.eea.europa.eu), verified 2026-06-18.
WFD classification · PT04MON0678
The full read · show the working · for brown trout · confidence 90%
How the 71 is built — score × weight = contribution
Temperature68 × 28%19.0
Flow60 × 22%13.2
Clarity95 × 18%17.1
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity61 × 12%7.3
Conditions total= 71
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
Seasons & zones
- Trout1 March → 31 July
Related guides
Booking & contacts