Spate · Mixed · Gipuzkoa, País Vasco

Oria

Oria — Lasarto el monto cropped

A central Gipuzkoa trout-and-sea-trout river of solid reputation, flowing through pastoral landscapes with mixed geology and a 6-hour spate response.

Tomorrow · Not the day for it
Czech Nymph
Forecast · Tomorrow
Not the day for it
Not much stacked in your favour today. Worth an hour if you are nearby, not worth the special trip.
45% projected
Today's fly
Czech Nymph
Czech Nymph
Conditions on the water · Tomorrow
Live gauge
Level
Rising
0.53 m
lowspate
Water temp11.2°C
ClarityUnfishable
Weather13°C
WindN 12 km/h
Pressure1011 hPa
Rain · recent17.9 mm
Rain · ahead5.6 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
Ideal
11°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 temperature is working for you, but river flow is the limiting factor today.
Likely species
Gammarids
Hatch timeline · tomorrowPeak at 11am

12pm(now) — Autumn Needle Fly

Stage: Creeping nymphsApproach: Heavy nymphActivity: 30%
Also:Autumn Olive21%
Peak emergence window4 food groups active

Peak activity at 11am — Autumn Needle Fly (Autumn Needle Fly, Peak emergence window)

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 4 guilds as a supporter.

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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
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
Brown Trout fly box
Permits & access
Permit required — see local rules.
  • Gipuzkoa fishing licence required
  • Check the exact named stretch and any coto-style allocation rules before travel; do not import Bidasoa border logic into the Oria.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Urumea
7.0 km
30
Brown trout · Sea trout
Urola
21 km
82
Brown trout
Deba
27 km
80
Brown trout
Deba
27 km
Brown trout
Bidasoa
30 km
80
Brown trout · Sea trout
Gallery · 2
  1. Oria — Lasarto el monto cropped
    Lasarto el monto cropped
  2. Terrain map of the venue
    Terrain map
About this water

The middle sections hold the most productive pools and offer quieter fishing than the better-known Bidasoa or Urumea. In practical terms this is a trout river with some migratory heritage, not a modern salmon-destination row.

Hatches & food

In the steep, often pressured Atlantic rivers of the Basque Country, trout opportunities centre on spring olives and other up-wings when flows and colour briefly line up, with caddis and buzzers helping to sustain sport into early and mid-summer, and terrestrials from grassy, wooded margins adding surface food in quieter, recovering reaches.

  • Mixed
Water quality (WFD)
  • Ecology: Moderate
  • Chemical: Unknown
What this classification means

WFD ecological status Bad → Moderate corrected to EEA WISE 2022 (3rd RBMP) classification for waterbody ES017MSPFES028MAR002662 (was a stale earlier-cycle value). Source: EEA WISE SWB_SurfaceWaterBody (discodata.eea.europa.eu), verified 2026-06-18.

WFD classification · ES017MSPFES028MAR002662

The full read · show the working · for Brown Trout · confidence 75%
How the 71 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow40 × 22%8.8
Clarity75 × 18%13.5
Feeding Time80 × 13%10.4
Pressure80 × 7%5.6
Insect activity43 × 12%5.2
Conditions total= 72
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout third Sunday of March → 31 July

Sea trout: Variable seasonal (2026)

Salmon: Heritage only (2026) — Heritage salmon river. In practical angling terms, salmon are not a target species — focus on trout and sea trout.

Related guides
Pyrenees PlaybookSpanish riversEuro Nymphingsubsurface methods
Booking & contacts
At a glance

Oria is a spate river in Gipuzkoa, País Vasco, Spain. It sits at about 49 m above sea level. The river is described as roughly 80 km long. Species listed for this water: brown trout and sea trout. The trout season is recorded as running from third Sunday of March to 31 July. Best window recorded for anglers: March–July for trout, with sea trout adding some later-season migratory interest. Core methods listed: dry fly; wet fly; euro nymphing. Level and flow data for this water is linked from 1 gauge. Its Water Framework Directive ecological status is recorded as moderate. Nearby waters in our listings include Urumea at 7.0 km, Urola at 21 km and Deba at 27 km.