Spate · Slate · Asturias, Spain

Río Ser

Río Ser venue image

Headwater country — the Ser is the kind of river you find when you've been following a track that stopped looking like a road some time ago.

Poor · Brown Trout
Pardón de Meana · 20-22
Closed season
Out of season. Plenty of other water available now.
Closed — confidence not applicable today.
What moved it
  • Level0.13 mLast reading 10h ago
  • Water temp17.7°C
  • ClarityClear
Today's fly
Pardón de Meana
Pardón de Meana20-22
Upstream dry, on top
Conditions on the water
Live gauge
Level
Steady
0.13 m
lowspate
Water temp17.7°C
ClarityClear
Weather17°C
WindNE 16 km/h
Pressure1018 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Brown Trout
Warm — slow
18°C est.ideal 1016°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 · todayPeak at 6pm

Hatch predictions

Today's headline hatch shown — see all 6 active hatches hour by hour with Pro.

Start free trial

14-day free trial. Cancel anytime.

Sub-surface · on the nymphunder the surface

Hatch predictions

See the full sub-surface read with Pro.

Start free trial

14-day free trial. Cancel anytime.

Beyond the hatch · worth watchingambient prey

Hatch predictions

See what else is on the menu with Pro.

Start free trial

14-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 · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
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
SC
Small Chironomid
22-24 · Pattern
Upstream dry, on top
Permits & access
Free state water
State rod licence required for trout / salmon as applicable.
  • Asturian fishing licence required.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

Headwater country — the Ser is the kind of river you find when you've been following a track that stopped looking like a road some time ago. Wild browns that have seen nothing but natural flies and the occasional heron. The fishing is not complicated. Getting there takes some doing.

Under the surface

The Ser is a smaller slate-fed river in the eastern Asturian system, spate-responsive and amber-toned. The upper reaches are step-pool through Cantabrian slate; the descent is steep and response to rainfall immediate. The Ser maintains its mountain character throughout — responsive, slate-stained, belonging fully to the Cantabrian system. The pools available are brief; the character is descent and response.

Wading: Slick wet slate slabs at step lips

Hatches & food

In the mountain-to-sea trout rivers of Asturias, olives and other mayflies do much of the work in spring whenever levels and colour allow, followed by strong evening caddis and steady buzzer life through early and mid-summer, with terrestrials and mixed surface food from wooded, pastoral banks rounding out the diet whenever flows drop back into safe wading range.

  • Slate
  • Confined
  • Cascade
  • Step pool
The full read · show the working · for Brown Trout · confidence 55%
How the 0 is built — score × weight = contribution
Temperature62 × 28%17.4
Flow15 × 22%3.3
Clarity95 × 18%17.1
Feeding Time75 × 13%9.8
Pressure80 × 7%5.6
Insect activity16 × 12%1.9
Limiting factor: River is stable — Brown Trout prefers medium flow= 55
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
A drop and clear would lift the flow and clarity scores.
Related guides
Booking & contacts