Caddisflies
Gammarids
- Ecology: Good
- Chemical: Unknown
WFD classification · ES018MSPFES133MAR000640
Rules at a glance
- Public water
- Licence required
Water temperature for Brown Trout
Warm — slow16°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
Poor — water temperature is working for you, but river flow is the limiting factor today.
Likely species
Caddisflies
- Green SedgeMost likelyLower confidenceNearest relative#10–12–14–16 · NymphFree-living green caddis larva; fast stony riffles.
- Net-spinning caddisAlso possibleLower confidenceNearest relative#12–14–16 · PupaWidespread riffle net-spinner; evening emergence.
- CapererAlso possibleLower confidence#10–12 · AdultBig autumn sedge; fish dry at last light.
Hatch timeline · todayPeak at 12 Uhr
12 Uhr(now) — Heather Fly
Stage: Terrestrials on topApproach: Dry flyActivity: 52%
Also:Reed Smut48%Autumn Dun25%Cinnamon Sedge25%
Peak emergence window10 food groups active
Peak activity at 12 Uhr — Heather Fly (Heather Fly, Peak emergence window)
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 4 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 · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
March BrownHatch
2
3
2
Late March BrownHatch
2
3
2
Large Brook DunHatch
2
3
2
Large StoneflyHatch
2
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Fly box · Brown Trout
22-24 · Pattern
Upstream dry, on top
Beats · 2
Rales · 2.4 kmC&R trout
C&R trout stretch — Puente de Rales to Puente de San Martín.
Beat detail
Daily permit required, all fish returned
Upstream: Puente de Rales
Downstream: Puente de San Martín
San Antolín · 1.8 kmTrout permit
Trout permit stretch — Puente de San Martín to Puente viejo de San Antolín.
Beat detail
Daily permit required, keep within bag limits
Upstream: Puente de San Martín
Downstream: Puente viejo de San Antolín
Permits & access
Free state water
State rod licence required for trout / salmon as applicable.
- Asturian fishing licence required
- In 2026 many trout waters run to 15 August, but salmon zones, mountain zones, tramos sin muerte, and border stretches can differ
- Check local coto and tramo rules before fishing.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
Plage de San Antolín à l'embouchure du rio Bedón Terrain map
Water quality (WFD)
The full read · show the working · for Brown Trout · confidence 55%
How the 30 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow15 × 22%3.3
Clarity95 × 18%17.1
Feeding Time45 × 13%5.9
Pressure80 × 7%5.6
Insect activity17 × 12%2.0
Limiting factor: River is stable — Brown Trout prefers medium flow= 62
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
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
Sea trout: Variable seasonal (2026)
Related guides
Booking & contacts
Permits & access
- Pesca Fluvial Asturias — Permisos & Sorteo de CotosPermit information and the annual coto lottery (sorteo anual) for salmon, trout and reo. Run by the Principado de Asturias, not the Federación — the previous entry credited the Federación Asturiana de Pesca and pointed at fedpesca.com, which no longer resolves. The Federación does still exist, at asturianadepesca.com, but it is not the permit-allocation authority.
- Sede Asturias — Permisos de PescaAsturian fishing licence and salmon coto permits (sorteo lottery system)
Clubs & associations
Río Bedón
Water temperature for Brown Trout
Warm — slow16°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
Poor — water temperature is working for you, but river flow is the limiting factor today.
Likely species
Caddisflies
- Green SedgeMost likelyLower confidenceNearest relative#10–12–14–16 · NymphFree-living green caddis larva; fast stony riffles.
- Net-spinning caddisAlso possibleLower confidenceNearest relative#12–14–16 · PupaWidespread riffle net-spinner; evening emergence.
- CapererAlso possibleLower confidence#10–12 · AdultBig autumn sedge; fish dry at last light.
Hatch timeline · todayPeak at 12 Uhr
12 Uhr(now) — Heather Fly
Stage: Terrestrials on topApproach: Dry flyActivity: 52%
Also:Reed Smut48%Autumn Dun25%Cinnamon Sedge25%
Peak emergence window10 food groups active
Peak activity at 12 Uhr — Heather Fly (Heather Fly, Peak emergence window)
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 4 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 · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
March BrownHatch
2
3
2
Late March BrownHatch
2
3
2
Large Brook DunHatch
2
3
2
Large StoneflyHatch
2
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Fly box · Brown Trout
22-24 · Pattern
Upstream dry, on top
Beats · 2
Rales · 2.4 kmC&R trout
C&R trout stretch — Puente de Rales to Puente de San Martín.
Beat detail
Daily permit required, all fish returned
Upstream: Puente de Rales
Downstream: Puente de San Martín
San Antolín · 1.8 kmTrout permit
Trout permit stretch — Puente de San Martín to Puente viejo de San Antolín.
Beat detail
Daily permit required, keep within bag limits
Upstream: Puente de San Martín
Downstream: Puente viejo de San Antolín
Permits & access
Free state water
State rod licence required for trout / salmon as applicable.
- Asturian fishing licence required
- In 2026 many trout waters run to 15 August, but salmon zones, mountain zones, tramos sin muerte, and border stretches can differ
- Check local coto and tramo rules before fishing.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
Plage de San Antolín à l'embouchure du rio Bedón Terrain map
Water quality (WFD)
- Ecology: Good
- Chemical: Unknown
WFD classification · ES018MSPFES133MAR000640
The full read · show the working · for Brown Trout · confidence 55%
How the 30 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow15 × 22%3.3
Clarity95 × 18%17.1
Feeding Time45 × 13%5.9
Pressure80 × 7%5.6
Insect activity17 × 12%2.0
Limiting factor: River is stable — Brown Trout prefers medium flow= 62
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
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
Sea trout: Variable seasonal (2026)
Related guides
Booking & contacts
Permits & access
- Pesca Fluvial Asturias — Permisos & Sorteo de CotosPermit information and the annual coto lottery (sorteo anual) for salmon, trout and reo. Run by the Principado de Asturias, not the Federación — the previous entry credited the Federación Asturiana de Pesca and pointed at fedpesca.com, which no longer resolves. The Federación does still exist, at asturianadepesca.com, but it is not the permit-allocation authority.
- Sede Asturias — Permisos de PescaAsturian fishing licence and salmon coto permits (sorteo lottery system)
Clubs & associations